Reducing the metabolic rate of walking and running with a versatile, portable exosuit. Jinsoo Kim et al. Science Aug 16 2019: Vol. 365, Issue 6454, pp. 668-672. DOI: 10.1126/science.aav7536
Lowering locomotion's metabolic cost
Walking and running require different gaits, with each type of motion putting a greater bias on different muscles and joints. Kim et al. developed a soft, fully portable, lightweight exosuit that is able to reduce the metabolic rate for both running and walking by assisting each motion via the hip extension (see the Perspective by Pons). A waist belt holds most of the mass, thus reducing the cost of carrying the suit. By tracking the motion of the user, the suit is able to switch modes between the two types of motion automatically.
Abstract: Walking and running have fundamentally different biomechanics, which makes developing devices that assist both gaits challenging. We show that a portable exosuit that assists hip extension can reduce the metabolic rate of treadmill walking at 1.5 meters per second by 9.3% and that of running at 2.5 meters per second by 4.0% compared with locomotion without the exosuit. These reduction magnitudes are comparable to the effects of taking off 7.4 and 5.7 kilograms during walking and running, respectively, and are in a range that has shown meaningful athletic performance changes. The exosuit automatically switches between actuation profiles for both gaits, on the basis of estimated potential energy fluctuations of the wearer’s center of mass. Single-participant experiments show that it is possible to reduce metabolic rates of different running speeds and uphill walking, further demonstrating the exosuit’s versatility.
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Humans can walk and run to attain a wider speed range. At low speeds, the metabolic rate of walking is lower than that of running, but this tendency is reversed at higher speeds, such that at high speeds the metabolic rate of running is lower than that of walking. The ability to switch between walking and running allows humans to adopt the gait with the lowest metabolic rate at each speed (fig. S1A) (1, 2). Development of robotic assistive devices that can provide benefits for both walking and running is challenging because of the fundamentally different biomechanics of these gaits (3). In walking, the legs function like inverted pendulums to move the center of mass (CoM), and the gravitational potential energy and kinetic energy fluctuate out of phase (4). Running, meanwhile, can be modeled as a spring–mass system (5–7) with in-phase gravitational potential and kinetic energy fluctuations (4). In walking, the greatest internal joint moments occur at the ankle, and the hip and ankle perform approximately the same amount of positive work. In running, the greatest internal joint moments occur at the knee and ankle, and the ankle performs the largest amount of positive work, followed by the hip (8, 9).
Because of these differences, most research laboratories have developed separate assistive devices for walking (10–12) and running (3, 13–15). Robotic assistive devices have been shown to reduce the metabolic rate of walking below normal biological levels by 7 to 21% by assisting the ankle joint and/or the hip joint (11, 12, 16, 17). Early efforts at reducing the metabolic rate of running have shown increases of 27 to 58% compared with running without an exoskeleton (13, 14). These increases occur in part because the metabolic cost of carrying mass (e.g., a robotic assistive device) during running (18) is greater than that during walking (19, 20), and the penalty for carrying mass on the limbs is further amplified due to increased limb acceleration (21, 22). Nasiri et al. developed an unpowered exoskeleton that reduced the metabolic rate of running by 8% by applying an elastic torque at the hip as a function of interthigh angle (23). However, those authors noted that this design may not be effective during walking because it could disrupt the swing phase.
We hypothesize that assisting walking and running requires customized actuation profiles via an interface with low distal mass and minimal restriction of motion during the unassisted portions of the gait cycle. To achieve these design criteria, we use functional apparel to attach the device to the wearer, with cables that generate moments in concert with the combined moment that results from different biological muscles. We previously developed such an exosuit that reduces the metabolic rate of walking by 14.9% by assisting the ankle and hip (16). In the current study, we aimed to develop and test a lightweight, portable exosuit that assists with hip extension and can switch automatically between actuation profiles for walking and running. We chose to assist hip extension because it is important for both gaits (8, 9, 24) and does not require added mass to distal leg segments.
The textile components of the device consist of a waist belt and two thigh wraps (Fig. 1A, fig. S2, and data S1). Subjective testing of the maximum range of motion shows that the exosuit does not restrict the movements required for walking and running (Fig. 1B). Two electrical motors connected to cables via pulleys apply a tensile force between the waist belt and the thigh wraps to generate an external extension moment around the hip joint (movie S1 and data S2) (3). The entire exosuit weighs 5.0 kg, with 91% of the total system mass carried at the waist (table S1). This design approach minimizes the additional metabolic rate penalty when mass is added distally during walking (25) and running (22) (Fig. 1C). We programmed two separate actuation force profiles for walking and running. The timings of the walking profile and the running profile were selected on the basis of the profiles with the highest reduction in metabolic rate for walking (26) and running (27) in prior studies that used nonportable, tethered hip exosuits. The profile from the walking study was originally designed to approximate the biological hip extension moment, whereas the profile from the running study was designed to approximate the optimal profile from a muscle-driven simulation (24). Using these profiles as starting points, they were then slightly tailored to improve controller robustness and comfort through pilot tests. To allow the wearer to switch seamlessly between walking and running, we used an online classification algorithm that functions on the basis of potential energy fluctuations measured by inertial measurement units (IMUs) (Fig. 2, movie S1, and data S3) (3, 28).
[full text, graphs, references at the link above]
Friday, August 16, 2019
First indication that dog caretakers may transfer their racial biases onto their pet dogs; or that the caretakers projected their racial biases & perceived dog stereotypes onto their dogs
Dhont, Kristof and Hodson, Gordon and Loughnan, Steve and Amiot, Catherine E. (2019) Rethinking Human-Animal Relations: The Critical Role of Social Psychology. Group Processes & IntergroupRelations. (In press). https://kar.kent.ac.uk/75493
Abstract: People deeply value theirsocial bonds with companion animals, yet routinely devalue other animals, considering them mere commodities to satisfy human interests and desires. Despite the inherently social and intergroup nature of these complexities, social psychology is long overdue in integrating human-animal relations in its theoretical frameworks. The present body of workbrings together social psychological research advancing ourunderstanding of: 1) the factors shaping our perceptionsand thinkingabout animals as social groups, 2) the complexities involved in valuing (caring) and devaluing (exploiting) animals, and 3) the implications and importance of human-animal relationsfor human intergroup relations. In this article, we surveythe diversity of research paradigms and theoretical frameworks developed within the intergroup relations literature that are relevant, perchance critical,to the study of human-animal relations. Furthermore, we highlight how understanding and rethinking human-animal relations will eventually lead to a more comprehensive understanding of many human intergroup phenomena.
Keywords: human-animal relations; speciesism; prejudice; meat consumption; social identity; social dominance; dehumanization; cognitive dissonance
Abstract: People deeply value theirsocial bonds with companion animals, yet routinely devalue other animals, considering them mere commodities to satisfy human interests and desires. Despite the inherently social and intergroup nature of these complexities, social psychology is long overdue in integrating human-animal relations in its theoretical frameworks. The present body of workbrings together social psychological research advancing ourunderstanding of: 1) the factors shaping our perceptionsand thinkingabout animals as social groups, 2) the complexities involved in valuing (caring) and devaluing (exploiting) animals, and 3) the implications and importance of human-animal relationsfor human intergroup relations. In this article, we surveythe diversity of research paradigms and theoretical frameworks developed within the intergroup relations literature that are relevant, perchance critical,to the study of human-animal relations. Furthermore, we highlight how understanding and rethinking human-animal relations will eventually lead to a more comprehensive understanding of many human intergroup phenomena.
Keywords: human-animal relations; speciesism; prejudice; meat consumption; social identity; social dominance; dehumanization; cognitive dissonance
The results offer further evidence that psychosocial influences in the development of adolescent sexual orientation are weak or non‐existent
A longitudinal birth cohort study of early life conditions, psychosocial factors, and emerging adolescent sexual orientation. Yin Xu, Sam Norton, Qazi Rahman. Developmental Psychobiology, August 4 2019. https://doi.org/10.1002/dev.21894
Abstract: This study tested whether previously reported associations between early life factors and later adolescent sexual orientation could be replicated in another prospective birth cohort, the UK Millennium Cohort Study (MCS). We used data on 9,795 youth from the MCS. Emerging sexual orientation was assessed using measures of sexual attraction to males and females in separate items at 14 years. Factors including birthweight, breastfeeding, sibling composition, parental ages, maternal psychopathology, parent‐child relationship, and contextual risks were separated into three developmental periods: prenatal (n = 5 factors), before 7 years (n = 6 factors), and after 7 years (n = 5 factors). We controlled for handedness as a putative marker of prenatal androgen exposure and the possibility of mischievous responding statistically. Girls with greater maternal psychological distress since age 7 and greater pubertal body mass index were more likely to be nonheterosexual but the effect sizes were very small. Among boys there were no significant associations between any early life conditions and later sexual orientation. However, focusing on effect sizes rather than significance levels, there were small associations between preterm birth and nonheterosexuality. The results offer further evidence that psychosocial influences in the development of adolescent sexual orientation are weak or non‐existent.
Abstract: This study tested whether previously reported associations between early life factors and later adolescent sexual orientation could be replicated in another prospective birth cohort, the UK Millennium Cohort Study (MCS). We used data on 9,795 youth from the MCS. Emerging sexual orientation was assessed using measures of sexual attraction to males and females in separate items at 14 years. Factors including birthweight, breastfeeding, sibling composition, parental ages, maternal psychopathology, parent‐child relationship, and contextual risks were separated into three developmental periods: prenatal (n = 5 factors), before 7 years (n = 6 factors), and after 7 years (n = 5 factors). We controlled for handedness as a putative marker of prenatal androgen exposure and the possibility of mischievous responding statistically. Girls with greater maternal psychological distress since age 7 and greater pubertal body mass index were more likely to be nonheterosexual but the effect sizes were very small. Among boys there were no significant associations between any early life conditions and later sexual orientation. However, focusing on effect sizes rather than significance levels, there were small associations between preterm birth and nonheterosexuality. The results offer further evidence that psychosocial influences in the development of adolescent sexual orientation are weak or non‐existent.
Gamification as it is currently operationalized in empirical studies is an effective method for instruction, although factors contributing to successful gamification are still somewhat unresolved, especially for cognitive learning
The Gamification of Learning: a Meta-analysis. Michael Sailer, Lisa Homner. Educational Psychology Review, August 15 2019, https://link.springer.com/article/10.1007/s10648-019-09498-w
Abstract: Ths meta-analysis was conducted to systematically synthesize research findings on effects of gamification on cognitive, motivational, and behavioral learning outcomes. Results from random effects models showed significant small effects of gamification on cognitive (g = .49, 95% CI [0.30, 0.69], k = 19, N = 1686), motivational (g = .36, 95% CI [0.18, 0.54], k = 16, N = 2246), and behavioral learning outcomes (g = .25, 95% CI [0.04, 0.46], k = 9, N = 951). Whereas the effect of gamification on cognitive learning outcomes was stable in a subsplit analysis of studies employing high methodological rigor, effects on motivational and behavioral outcomes were less stable. Given the heterogeneity of effect sizes, moderator analyses were conducted to examine inclusion of game fiction, social interaction, learning arrangement of the comparison group, as well as situational, contextual, and methodological moderators, namely, period of time, research context, randomization, design, and instruments. Inclusion of game fiction and social interaction were significant moderators of the effect of gamification on behavioral learning outcomes. Inclusion of game fiction and combining competition with collaboration were particularly effective within gamification for fostering behavioral learning outcomes. Results of the subsplit analysis indicated that effects of competition augmented with collaboration might also be valid for motivational learning outcomes. The results suggest that gamification as it is currently operationalized in empirical studies is an effective method for instruction, even though factors contributing to successful gamification are still somewhat unresolved, especially for cognitive learning outcomes.
Keywords: Gamification Learning Gamified learning Meta-analysis Cognition Motivation Behavior
Abstract: Ths meta-analysis was conducted to systematically synthesize research findings on effects of gamification on cognitive, motivational, and behavioral learning outcomes. Results from random effects models showed significant small effects of gamification on cognitive (g = .49, 95% CI [0.30, 0.69], k = 19, N = 1686), motivational (g = .36, 95% CI [0.18, 0.54], k = 16, N = 2246), and behavioral learning outcomes (g = .25, 95% CI [0.04, 0.46], k = 9, N = 951). Whereas the effect of gamification on cognitive learning outcomes was stable in a subsplit analysis of studies employing high methodological rigor, effects on motivational and behavioral outcomes were less stable. Given the heterogeneity of effect sizes, moderator analyses were conducted to examine inclusion of game fiction, social interaction, learning arrangement of the comparison group, as well as situational, contextual, and methodological moderators, namely, period of time, research context, randomization, design, and instruments. Inclusion of game fiction and social interaction were significant moderators of the effect of gamification on behavioral learning outcomes. Inclusion of game fiction and combining competition with collaboration were particularly effective within gamification for fostering behavioral learning outcomes. Results of the subsplit analysis indicated that effects of competition augmented with collaboration might also be valid for motivational learning outcomes. The results suggest that gamification as it is currently operationalized in empirical studies is an effective method for instruction, even though factors contributing to successful gamification are still somewhat unresolved, especially for cognitive learning outcomes.
Keywords: Gamification Learning Gamified learning Meta-analysis Cognition Motivation Behavior
Thursday, August 15, 2019
Empirical evidence for a statistically significant 4% gender wage gap among workers, at the project level; female workers propose lower wage bills and are more likely to win the competition for contracts, get higher revenues overall
Gomez Herrera, Estrella and Mueller-Langer, Frank, Is There a Gender Wage Gap in Online Labor Markets? Evidence from Over 250,000 Projects and 2.5 Million Wage Bill Proposals (July 9, 2019). Max Planck Institute for Innovation & Competition Research Paper No. 19-07. SSRN: http://dx.doi.org/10.2139/ssrn.3427012
Abstract: We explore whether there is a gender wage gap in one of the largest EU online labor markets, PeoplePerHour. Our unique dataset consists of 257,111 digitally tradeable tasks of 55,824 hiring employers from 188 countries and 65,010 workers from 173 countries that made more than 2.5 million wage bill proposals in the competition for contracts. Our data allows us to track the complete hiring process from the employers' design of proposed contracts to the competition among workers and the final agreement between employers and successful candidates. Using Heckman and OLS estimation methods we provide empirical evidence for a statistically significant 4% gender wage gap among workers, at the project level. We also find that female workers propose lower wage bills and are more likely to win the competition for contracts. Once we include workers’ wage bill proposals in the regressions, the gender wage gap virtually disappears, i.e., it is statistically insignificant and very small in magnitude (0.3%). Our results also suggest that female workers’ higher winning probabilities associated with lower wage bill proposals lead to higher expected revenues overall. We provide empirical evidence for heterogeneity of the gender wage gap in some of the job categories, all job difficulty levels and some of the worker countries. Finally, for some subsamples we find a statistically significant but very small "reverse" gender wage gap.
Keywords: Gender wage gap, online labor markets, digitally performable projects
JEL Classification: D40; J40
Abstract: We explore whether there is a gender wage gap in one of the largest EU online labor markets, PeoplePerHour. Our unique dataset consists of 257,111 digitally tradeable tasks of 55,824 hiring employers from 188 countries and 65,010 workers from 173 countries that made more than 2.5 million wage bill proposals in the competition for contracts. Our data allows us to track the complete hiring process from the employers' design of proposed contracts to the competition among workers and the final agreement between employers and successful candidates. Using Heckman and OLS estimation methods we provide empirical evidence for a statistically significant 4% gender wage gap among workers, at the project level. We also find that female workers propose lower wage bills and are more likely to win the competition for contracts. Once we include workers’ wage bill proposals in the regressions, the gender wage gap virtually disappears, i.e., it is statistically insignificant and very small in magnitude (0.3%). Our results also suggest that female workers’ higher winning probabilities associated with lower wage bill proposals lead to higher expected revenues overall. We provide empirical evidence for heterogeneity of the gender wage gap in some of the job categories, all job difficulty levels and some of the worker countries. Finally, for some subsamples we find a statistically significant but very small "reverse" gender wage gap.
Keywords: Gender wage gap, online labor markets, digitally performable projects
JEL Classification: D40; J40
The “unmotivated bias” of overprecision causes partisan hostility; prior literature has focused on motivated reasoning and social identity theory;overprecision increases hostility directly and indirectly
“Unmotivated bias” and partisan hostility: Empirical evidence. Daniel F. Stone. Journal of Behavioral and Experimental Economics, Volume 79, April 2019, Pages 12-26. https://doi.org/10.1016/j.socec.2018.12.009
Highlights
• I argue that the “unmotivated bias” of overprecision causes partisan hostility.
• Prior literature has focused on motivated reasoning and social identity theory.
• I present evidence that overprecision increases hostility directly and indirectly.
• The direct effects hold fixed ideology, partisanship, and motivated reasoning.
• The indirect effects are via increasing strength of partisanship.
Abstract: Extreme partisan animosity has been on the rise in the US and is prevalent around the world. This hostility is typically attributed to social group identity, motivated reasoning, or a combination thereof. In this paper, I empirically examine a novel contributing factor: the “unmotivated” cognitive bias of overprecision (overconfidence in precision of beliefs). Overprecision could cause partisan hostility indirectly via inflated confidence in one’s own ideology, partisan identity, or perceptions of social distance between the parties. Overprecision could also cause this hostility directly by causing excessively strong inferences from observed information that is either skewed against the out-party or simply misunderstood. Using a nationally representative sample, I find consistent support for direct effects of overprecision and mixed support for indirect effects. The point estimates imply a one standard deviation increase in a respondent’s overprecision predicts as much as a 0.71 standard deviation decline in relative out-party favorability.
Highlights
• I argue that the “unmotivated bias” of overprecision causes partisan hostility.
• Prior literature has focused on motivated reasoning and social identity theory.
• I present evidence that overprecision increases hostility directly and indirectly.
• The direct effects hold fixed ideology, partisanship, and motivated reasoning.
• The indirect effects are via increasing strength of partisanship.
Abstract: Extreme partisan animosity has been on the rise in the US and is prevalent around the world. This hostility is typically attributed to social group identity, motivated reasoning, or a combination thereof. In this paper, I empirically examine a novel contributing factor: the “unmotivated” cognitive bias of overprecision (overconfidence in precision of beliefs). Overprecision could cause partisan hostility indirectly via inflated confidence in one’s own ideology, partisan identity, or perceptions of social distance between the parties. Overprecision could also cause this hostility directly by causing excessively strong inferences from observed information that is either skewed against the out-party or simply misunderstood. Using a nationally representative sample, I find consistent support for direct effects of overprecision and mixed support for indirect effects. The point estimates imply a one standard deviation increase in a respondent’s overprecision predicts as much as a 0.71 standard deviation decline in relative out-party favorability.
Dollars do not determine detection: Monetary value associated with unexpected objects does not affect the likelihood of inattentional blindness
Dollars do not determine detection: Monetary value associated with unexpected objects does not affect the likelihood of inattentional blindness. Dennis Redlich et al. Quarterly Journal of Experimental Psychology, March 18, 2019. https://doi.org/10.1177/1747021819835148
Abstract: Conscious perception often fails when an object appears unexpectedly and our attention is focused elsewhere (inattentional blindness). Although various factors have been identified that modulate the likelihood of this failure of awareness, it is not clear whether the monetary reward value associated with an object can affect whether or not this object is detected under conditions of inattention. We hypothesised that unexpectedly appearing objects that contain a feature linked to high value, as established via reward learning in a previous task, would subsequently be detected more frequently than objects containing a feature linked to low value. A total of 537 participants first learned the association between a perceptual feature (colour) and subsequent reward values (high, low, or none reward). Afterwards, participants were randomly assigned to a static (Experiment 1) or dynamic (Experiment 2) inattentional blindness task including an unexpected object associated with high, low, or none reward. However, no significant effect of the previously learned value on the subsequent likelihood of detection was observed. We speculate that artificial monetary value, which is known to affect attentional capture, is not strong enough to determine whether or not an object is consciously perceived.
Keywords: Failure of awareness, value-driven attention, inattentional blindness
Abstract: Conscious perception often fails when an object appears unexpectedly and our attention is focused elsewhere (inattentional blindness). Although various factors have been identified that modulate the likelihood of this failure of awareness, it is not clear whether the monetary reward value associated with an object can affect whether or not this object is detected under conditions of inattention. We hypothesised that unexpectedly appearing objects that contain a feature linked to high value, as established via reward learning in a previous task, would subsequently be detected more frequently than objects containing a feature linked to low value. A total of 537 participants first learned the association between a perceptual feature (colour) and subsequent reward values (high, low, or none reward). Afterwards, participants were randomly assigned to a static (Experiment 1) or dynamic (Experiment 2) inattentional blindness task including an unexpected object associated with high, low, or none reward. However, no significant effect of the previously learned value on the subsequent likelihood of detection was observed. We speculate that artificial monetary value, which is known to affect attentional capture, is not strong enough to determine whether or not an object is consciously perceived.
Keywords: Failure of awareness, value-driven attention, inattentional blindness
Assessing the effects of vegetable consumption on the psychological health of healthy adults: a systematic review of prospective research
Assessing the effects of vegetable consumption on the psychological
health of healthy adults: a systematic review of prospective research. Nicola-Jayne Tuck, Claire Farrow, Jason M Thomas. The American Journal of Clinical Nutrition, Volume 110, Issue 1, July 2019, Pages 196–211, June 1 2019, https://doi.org/10.1093/ajcn/nqz080
ABSTRACT
Background: To alleviate the immense health and economic burden of mental illness, modifiable targets to promote psychological health are required. Emerging evidence suggests that both fruit and vegetable (F&V) consumption may play an important role. However, the precise contribution of vegetable consumption, which may represent a more potent target than the consumption of fruit, has received little attention.
Objectives: This review aimed to synthesize and evaluate research investigating the effects of vegetable consumption on mental health and psychological well-being in nonclinical, healthy adult populations. We aimed to provide insight into the causal relation between vegetable consumption and these outcomes.
Methods: Only studies with prospective or experimental data were included. The survey of the literature was last implemented on 1 February, 2019.
Results: Ten eligible studies were identified, with a total sample size of n = 33,645, that measured vegetable intake separately from fruit, or combined this with fruit intake. Where studies explored the independent effects of fruit and vegetable consumption on psychological health (n = 3), 2 reported a preferential effect of vegetables (compared with fruit) on psychological well-being, whereas 1 reported a superior effect of fruit intake on odds reduction of symptoms of depression. More broadly, there was evidence that consuming the recommended amount of F&V (and exceeding this) was associated with increased psychological well-being. However, the effects of F&V consumption on mental health symptoms were inconsistent.
Conclusions: Increased F&V consumption has a positive effect on psychological well-being and there appears to be a preferential effect of vegetables (compared with fruit) from the limited data examined. The effect of F&V intake on mental health is less clear and, at present, there are no clear data to support a preferential effect of vegetable intake on mental health outcomes. Hence, additional research is warranted to investigate the influence of vegetables, compared with fruit, on psychological health in order to inform nutrition-based interventions. This review was registered at www.crd.york.ac.uk/prospero as CRD42017072880.
Keywords: systematic review, vegetables, fruit, mental health, psychological well-being
ABSTRACT
Background: To alleviate the immense health and economic burden of mental illness, modifiable targets to promote psychological health are required. Emerging evidence suggests that both fruit and vegetable (F&V) consumption may play an important role. However, the precise contribution of vegetable consumption, which may represent a more potent target than the consumption of fruit, has received little attention.
Objectives: This review aimed to synthesize and evaluate research investigating the effects of vegetable consumption on mental health and psychological well-being in nonclinical, healthy adult populations. We aimed to provide insight into the causal relation between vegetable consumption and these outcomes.
Methods: Only studies with prospective or experimental data were included. The survey of the literature was last implemented on 1 February, 2019.
Results: Ten eligible studies were identified, with a total sample size of n = 33,645, that measured vegetable intake separately from fruit, or combined this with fruit intake. Where studies explored the independent effects of fruit and vegetable consumption on psychological health (n = 3), 2 reported a preferential effect of vegetables (compared with fruit) on psychological well-being, whereas 1 reported a superior effect of fruit intake on odds reduction of symptoms of depression. More broadly, there was evidence that consuming the recommended amount of F&V (and exceeding this) was associated with increased psychological well-being. However, the effects of F&V consumption on mental health symptoms were inconsistent.
Conclusions: Increased F&V consumption has a positive effect on psychological well-being and there appears to be a preferential effect of vegetables (compared with fruit) from the limited data examined. The effect of F&V intake on mental health is less clear and, at present, there are no clear data to support a preferential effect of vegetable intake on mental health outcomes. Hence, additional research is warranted to investigate the influence of vegetables, compared with fruit, on psychological health in order to inform nutrition-based interventions. This review was registered at www.crd.york.ac.uk/prospero as CRD42017072880.
Keywords: systematic review, vegetables, fruit, mental health, psychological well-being
Will Healthy Eating Make You Happier? A Research Synthesis Using an Online Findings Archive
Will Healthy Eating Make You Happier? A Research Synthesis Using an Online Findings Archive. Ruut Veenhoven. Applied Research in Quality of Life, August 14 2019. https://link.springer.com/article/10.1007/s11482-019-09748-7
Abstract: Healthy eating adds to health and thereby contributes to a longer life, but will it also add to a happier life? Some people do not like healthy food, and since we spend a considerable amount of our life eating, healthy eating could make their life less enjoyable. Is there such a trade-off between healthy eating and happiness? Or instead a trade-on, healthy eating adding to happiness? Or do the positive and negative effects balance? If there is an effect of healthy eating on happiness, is that effect similar for everybody? If not, what kind of people profit from healthy eating happiness wise and what kind of people do not? If healthy eating does add to happiness, does it add linearly or is there some optimum for healthy ingredients in one’s diet? I considered the results published in 20 research reports on the relation between nutrition and happiness, which together yielded 47 findings. I reviewed these findings, using a new technique. The findings were entered in an online ‘findings archive’, the World Database of Happiness, each described in a standardized format on a separate ‘findings page’ with a unique internet address. In this paper, I use links to these finding pages and this allows us to summarize the main trends in the findings in a few tabular schemes. Together, the findings provide strong evidence of a causal effect of healthy eating on happiness. Surprisingly, this effect is not fully mediated by better health. This pattern seems to be universal, the available studies show only minor variations across people, times and places. More than three portions of fruits and vegetables per day goes with the most happiness, how many more for what kind of persons is not yet established.
Keywords: Happiness Health behaviour Diet Research synthesis
Abstract: Healthy eating adds to health and thereby contributes to a longer life, but will it also add to a happier life? Some people do not like healthy food, and since we spend a considerable amount of our life eating, healthy eating could make their life less enjoyable. Is there such a trade-off between healthy eating and happiness? Or instead a trade-on, healthy eating adding to happiness? Or do the positive and negative effects balance? If there is an effect of healthy eating on happiness, is that effect similar for everybody? If not, what kind of people profit from healthy eating happiness wise and what kind of people do not? If healthy eating does add to happiness, does it add linearly or is there some optimum for healthy ingredients in one’s diet? I considered the results published in 20 research reports on the relation between nutrition and happiness, which together yielded 47 findings. I reviewed these findings, using a new technique. The findings were entered in an online ‘findings archive’, the World Database of Happiness, each described in a standardized format on a separate ‘findings page’ with a unique internet address. In this paper, I use links to these finding pages and this allows us to summarize the main trends in the findings in a few tabular schemes. Together, the findings provide strong evidence of a causal effect of healthy eating on happiness. Surprisingly, this effect is not fully mediated by better health. This pattern seems to be universal, the available studies show only minor variations across people, times and places. More than three portions of fruits and vegetables per day goes with the most happiness, how many more for what kind of persons is not yet established.
Keywords: Happiness Health behaviour Diet Research synthesis
The Pot Rush: Is Legalized Marijuana A Positive Local Amenity?
The Pot Rush: Is Legalized Marijuana A Positive Local Amenity? Diego Zambiasi Steven Stillman. Economic Inquiry, August 14 2019. https://doi.org/10.1111/ecin.12832
Abstract: This paper examines the amenity value of legalized marijuana by analyzing the impact of marijuana legalization on migration to Colorado. Colorado is the pioneering state in this area having legalized medical marijuana in 2000 and recreational marijuana in 2012. We test whether potential migrants to Colorado view legalized marijuana as a positive or negative local amenity. We use the synthetic control methodology to examine in‐ and out‐migration to/from Colorado versus migration to/from counterfactual versions of Colorado that have not legalized marijuana. We find strong evidence that potential migrants view legalized marijuana as a positive amenity with in‐migration significantly higher in Colorado compared with synthetic‐Colorado after the writing of the Ogden memo in 2009 that effectively allowed state laws already in place to be activated, and additionally after marijuana was legalized in 2013 for recreational use. When we employ permutation methods to assess the statistical likelihood of our results given our sample, we find that Colorado is a clear and significant outlier. We find no evidence for changes in out‐migration from Colorado suggesting that marijuana legalization did not change the equilibrium for individuals already living in the state.
Extraversion: The most important trait in sexual behavior (number of lifetime sexual partners, involvement in casual sex, marital infidelity, condom use, sexual coercion, & sexual harassment)
The Role of Personality in Sexual and Reproductive Health. Mark S. Allen. Current Directions in Psychological Science, August 14, 2019. https://doi.org/10.1177/0963721419862293
Abstract: Strong evidence suggests that sexual behavior and reproductive success can be predicted by personality traits. Here, I review new studies that have contributed to the understanding of these associations and outline potential avenues for further research. Findings show that extraversion is the most important personality trait in sexual behavior (number of lifetime sexual partners, involvement in casual sex, marital infidelity, condom use, male and female sexual dysfunction, sexual coercion, and sexual harassment) and that neuroticism, agreeableness, and conscientiousness are also associated with these outcomes. Extraversion has emerged as the most important personality trait for fertility in men but appears relatively unimportant for fertility in women. Findings for other personality traits are somewhat mixed, probably because of variations in research design, and further prospective studies are recommended to address potential bidirectional associations. Further research is also needed in adolescent samples, in understudied topic areas (e.g., sexually transmitted infections, biomarkers of fertility), and on personality similarity between sexual partners in samples from both poor and developed nations.
Keywords: five-factor model, fecundity, infertility, sexuality, sexually transmitted infections
Abstract: Strong evidence suggests that sexual behavior and reproductive success can be predicted by personality traits. Here, I review new studies that have contributed to the understanding of these associations and outline potential avenues for further research. Findings show that extraversion is the most important personality trait in sexual behavior (number of lifetime sexual partners, involvement in casual sex, marital infidelity, condom use, male and female sexual dysfunction, sexual coercion, and sexual harassment) and that neuroticism, agreeableness, and conscientiousness are also associated with these outcomes. Extraversion has emerged as the most important personality trait for fertility in men but appears relatively unimportant for fertility in women. Findings for other personality traits are somewhat mixed, probably because of variations in research design, and further prospective studies are recommended to address potential bidirectional associations. Further research is also needed in adolescent samples, in understudied topic areas (e.g., sexually transmitted infections, biomarkers of fertility), and on personality similarity between sexual partners in samples from both poor and developed nations.
Keywords: five-factor model, fecundity, infertility, sexuality, sexually transmitted infections
After having used a catalyst (flipping a coin) to make a decision, we experience a stronger feeling of suddenly knowing what we want, even when discarding the suggestion of the decision aid
Jaffé ME, Reutner L, Greifeneder R (2019) Catalyzing decisions: How a coin flip strengthens affective reactions. PLoS One 14(8): e0220736, August 14, 2019. https://doi.org/10.1371/journal.pone.0220736
Abstract: When individuals are undecided between options, they may flip a coin or use other aids that produce random outcomes to support decision-making. Such aids lead to clear suggestions, which, interestingly, individuals do not necessarily follow. Instead when looking at the outcome, individuals sometimes appear to like or dislike the suggestion, and then decide according to this feeling. In this manuscript we argue that such a decision aid can function as a catalyst. As it points to one option over the other, individuals focus on obtaining this option and engage in a more vivid representation of the same. By imagining obtaining the option, feelings related to the option become stronger, which then drive feelings of satisfaction or dissatisfaction with the outcome of the decision aid. We provide support for this phenomenon throughout two studies. Study 1 indicates that using a catalyst leads to stronger feelings. Study 2 replicates this finding using a different catalyst, and rules out alternative explanations. Here, participants report that after having used a catalyst, they experienced a stronger feeling of suddenly knowing what they want compared to the control group that did not use a catalyst. Implications of these results for research and practice are discussed.
Abstract: When individuals are undecided between options, they may flip a coin or use other aids that produce random outcomes to support decision-making. Such aids lead to clear suggestions, which, interestingly, individuals do not necessarily follow. Instead when looking at the outcome, individuals sometimes appear to like or dislike the suggestion, and then decide according to this feeling. In this manuscript we argue that such a decision aid can function as a catalyst. As it points to one option over the other, individuals focus on obtaining this option and engage in a more vivid representation of the same. By imagining obtaining the option, feelings related to the option become stronger, which then drive feelings of satisfaction or dissatisfaction with the outcome of the decision aid. We provide support for this phenomenon throughout two studies. Study 1 indicates that using a catalyst leads to stronger feelings. Study 2 replicates this finding using a different catalyst, and rules out alternative explanations. Here, participants report that after having used a catalyst, they experienced a stronger feeling of suddenly knowing what they want compared to the control group that did not use a catalyst. Implications of these results for research and practice are discussed.
Wednesday, August 14, 2019
Comedians: Both amateurs and professionals showed higher openness-to-experience, extraversion, & lower conscientiousness; professionals also evidenced greater neuroticism
Comedians’ Mean Level and Stage Personalities: Evidence for Goal-Directed Personality Adaptation. Paul Irwing et al. Personality and Social Psychology Bulletin, August 13, 2019. https://doi.org/10.1177/0146167219867963
Abstract: Recent findings have shown that both mean levels of personality and situational variability in its expression are of importance. So here, the Big Five personality traits of 77 professional and 125 amateur stand-up comedians were compared with two large matched samples (N > 100,000). The comedians were also observed while performing, which enabled a comparison of their stage personalities with situational requirements on 10 selected NEO-PIR facets. Both amateurs and professionals showed higher openness-to-experience, extraversion, and lower conscientiousness than their norm samples, while professionals also evidenced greater neuroticism. Irrespective of trait standing, with regard to most NEO-PIR facets, professionals expressed the appropriate on-stage persona and were better able to regulate their personality to conform to situational requirements than amateurs. This is consistent with research showing that individuals regulate their personality to conform to situational and goal requirements, and adds the finding that successful comedians demonstrate enhanced adaptability compared with amateurs.
Keywords: organizational behavior, personality, whole trait theory, comedians, invariance
Abstract: Recent findings have shown that both mean levels of personality and situational variability in its expression are of importance. So here, the Big Five personality traits of 77 professional and 125 amateur stand-up comedians were compared with two large matched samples (N > 100,000). The comedians were also observed while performing, which enabled a comparison of their stage personalities with situational requirements on 10 selected NEO-PIR facets. Both amateurs and professionals showed higher openness-to-experience, extraversion, and lower conscientiousness than their norm samples, while professionals also evidenced greater neuroticism. Irrespective of trait standing, with regard to most NEO-PIR facets, professionals expressed the appropriate on-stage persona and were better able to regulate their personality to conform to situational requirements than amateurs. This is consistent with research showing that individuals regulate their personality to conform to situational and goal requirements, and adds the finding that successful comedians demonstrate enhanced adaptability compared with amateurs.
Keywords: organizational behavior, personality, whole trait theory, comedians, invariance
Being in a romantic relationship, interacting & investing time with one’s partner predicted greater well-being; low-quality & not-so-great romantic relationships yield lower well-being than being unpartnered
The Highs and Lows of Love: Romantic Relationship Quality Moderates Whether Spending Time With One’s Partner Predicts Gains or Losses in Well-Being. Nathan W. Hudson, Richard E. Lucas, M. Brent Donnellan. Personality and Social Psychology Bulletin, August 13, 2019. https://doi.org/10.1177/0146167219867960
Abstract: Previous research suggests both relationship status and relationship quality correlate with well-being. The present study extended these findings in three ways. First, we benchmarked individuals with various-quality relationships against uncoupled people to determine whether even low-quality relationships are associated with greater well-being than being unpartnered. Second, research suggests global well-being (e.g., life satisfaction) and experiential well-being (e.g., momentary affect) oftentimes have different predictors. Thus, we tested whether individuals report greater experiential well-being while with their partners. Finally, we examined whether daily time invested into one’s relationship predicted well-being. Results indicated that being in a romantic relationship, interacting with one’s partner, and investing greater time into the relationship all predicted greater well-being. However, these effects were moderated by relationship quality, such that being in even relatively neutral relationships and interacting therein were associated with lower well-being than being unpartnered.
Keywords: subjective well-being, life satisfaction, positive affect, negative affect, close relationships, romantic relationships, relationship quality, day reconstruction method
Abstract: Previous research suggests both relationship status and relationship quality correlate with well-being. The present study extended these findings in three ways. First, we benchmarked individuals with various-quality relationships against uncoupled people to determine whether even low-quality relationships are associated with greater well-being than being unpartnered. Second, research suggests global well-being (e.g., life satisfaction) and experiential well-being (e.g., momentary affect) oftentimes have different predictors. Thus, we tested whether individuals report greater experiential well-being while with their partners. Finally, we examined whether daily time invested into one’s relationship predicted well-being. Results indicated that being in a romantic relationship, interacting with one’s partner, and investing greater time into the relationship all predicted greater well-being. However, these effects were moderated by relationship quality, such that being in even relatively neutral relationships and interacting therein were associated with lower well-being than being unpartnered.
Keywords: subjective well-being, life satisfaction, positive affect, negative affect, close relationships, romantic relationships, relationship quality, day reconstruction method
Tuesday, August 13, 2019
The microaggression research program: Excessively fuzzy boundaries of the microaggression construct + psychometric hazards of relying exclusively on subjective reports when detecting microaggressions
Microaggression Research and Application: Clarifications, Corrections, and Common Ground. Scott O. Lilienfeld. Perspectives on Psychological Science, August 13, 2019. https://doi.org/10.1177/1745691619867117
Abstract: In this issue, Williams (p. ♦♦♦) responds to my 2017 critique in this journal of the scientific status of the microaggression research program (MRP). In some cases, she presents helpful data that partially address several of my recommendations for enhancing the MRP’s rigor. Nevertheless, because she appears to misconstrue many of my arguments regarding the MRP, many of her rebuttals are not relevant to my criticisms. Furthermore, her assertions notwithstanding, Williams does not effectively address my concerns regarding the (a) excessively fuzzy boundaries of the microaggression construct, (b) psychometric hazards of relying exclusively on subjective reports when detecting microaggressions, and (c) hypothesized causal impact of microaggressions on mental health. In other cases, Williams appears to draw causal inferences from correlational data and conflate within-group with between-group differences. Although several of Williams’s recommendations for MRP research are worth considering, I contend that some others are unlikely to be conducive to a scientific approach to microaggressions. The MRP remains a promising but provisional research program that would benefit from greater openness to outside criticism. I conclude with a discussion of areas of potential common ground in microaggression research and application.
Keywords: Microaggressions, prejudice, racism, aggression, neuroticism
Abstract: In this issue, Williams (p. ♦♦♦) responds to my 2017 critique in this journal of the scientific status of the microaggression research program (MRP). In some cases, she presents helpful data that partially address several of my recommendations for enhancing the MRP’s rigor. Nevertheless, because she appears to misconstrue many of my arguments regarding the MRP, many of her rebuttals are not relevant to my criticisms. Furthermore, her assertions notwithstanding, Williams does not effectively address my concerns regarding the (a) excessively fuzzy boundaries of the microaggression construct, (b) psychometric hazards of relying exclusively on subjective reports when detecting microaggressions, and (c) hypothesized causal impact of microaggressions on mental health. In other cases, Williams appears to draw causal inferences from correlational data and conflate within-group with between-group differences. Although several of Williams’s recommendations for MRP research are worth considering, I contend that some others are unlikely to be conducive to a scientific approach to microaggressions. The MRP remains a promising but provisional research program that would benefit from greater openness to outside criticism. I conclude with a discussion of areas of potential common ground in microaggression research and application.
Keywords: Microaggressions, prejudice, racism, aggression, neuroticism
It's only funny if we say it: Disparagement humor is better received if it originates from a member of the group being disparaged
It's only funny if we say it: Disparagement humor is better received if it originates from a member of the group being disparaged. Michael Thai, Alex M.Borgella, Melanie S. Sanchez. Journal of Experimental Social Psychology, Volume 85, November 2019, 103838. https://doi.org/10.1016/j.jesp.2019.103838
Abstract: Three studies investigated whether disparagement humor would be received more positively if the source of the humor is part of the group being disparaged than if they are not a member of the disparaged group. In Study 1, participants examined a straight or gay source making either a disparaging joke targeting gay people or a control joke not disparaging gay people. In Study 2, participants examined a White, Black, or Asian source making a disparaging joke targeting Asian people. In Study 3, participants evaluated how generally acceptable it was for members of different social groups to make certain disparaging jokes. In all three studies, participants evaluated disparagement humor more favorably if the source belonged to the group being disparaged than if they did not. These findings uncover a conventional wisdom in the domain of disparagement humor – it is more permissible for people to make disparaging jokes about their own social groups.
Abstract: Three studies investigated whether disparagement humor would be received more positively if the source of the humor is part of the group being disparaged than if they are not a member of the disparaged group. In Study 1, participants examined a straight or gay source making either a disparaging joke targeting gay people or a control joke not disparaging gay people. In Study 2, participants examined a White, Black, or Asian source making a disparaging joke targeting Asian people. In Study 3, participants evaluated how generally acceptable it was for members of different social groups to make certain disparaging jokes. In all three studies, participants evaluated disparagement humor more favorably if the source belonged to the group being disparaged than if they did not. These findings uncover a conventional wisdom in the domain of disparagement humor – it is more permissible for people to make disparaging jokes about their own social groups.
Fellow travellers in cognitive evolution: Co-evolution of working memory and mental time travel? Mental time travel is not a privilege of the mammalian brain
Fellow travellers in cognitive evolution: Co-evolution of working memory and mental time travel? Dorothea Dere, Armin Zlomuzica, Ekrem Dere. Neuroscience & Biobehavioral Reviews, Volume 105, October 2019, Pages 94-105. https://doi.org/10.1016/j.neubiorev.2019.07.016
Highlights
• Co-evolution of working memory and mental time travel.
• Complex working memory function is a prerequisite for higher cognition.
• Mental time travel is not a privilege of the mammalian brain.
Abstract: Humans spend the lion’s share of their mental life either in their personal past or an anticipated or imagined future. This type of mental state is known as mental time travel. It is perhaps the most sophisticated and fitness-promoting cognition that has evolved in humans and with some reservation in animals. We have proposed that working memory capacity and the complexity of executive functions within working memory might limit the authenticity with which past events are reconstructed and anticipated or imagined future scenarios are constructed. In the present article, we discuss the possibility of a co-evolution between working memory capacity, complexity of executive functions available in the working memory workspace, and mental time travel abilities across species. We further assume that a complex working memory system can be constructed with quite different brains and conclude that the advanced cognitive function of thinking about the past and the future might not be a privilege of the mammalian brain.
Keywords: Mental time travelWorking memoryEpisodic-like memoryFellow traveller hypothesisTheory of mindAnimal cognitionWhat, where and when object memorySense of subjective timeAutonoetic consciousness
Highlights
• Co-evolution of working memory and mental time travel.
• Complex working memory function is a prerequisite for higher cognition.
• Mental time travel is not a privilege of the mammalian brain.
Abstract: Humans spend the lion’s share of their mental life either in their personal past or an anticipated or imagined future. This type of mental state is known as mental time travel. It is perhaps the most sophisticated and fitness-promoting cognition that has evolved in humans and with some reservation in animals. We have proposed that working memory capacity and the complexity of executive functions within working memory might limit the authenticity with which past events are reconstructed and anticipated or imagined future scenarios are constructed. In the present article, we discuss the possibility of a co-evolution between working memory capacity, complexity of executive functions available in the working memory workspace, and mental time travel abilities across species. We further assume that a complex working memory system can be constructed with quite different brains and conclude that the advanced cognitive function of thinking about the past and the future might not be a privilege of the mammalian brain.
Keywords: Mental time travelWorking memoryEpisodic-like memoryFellow traveller hypothesisTheory of mindAnimal cognitionWhat, where and when object memorySense of subjective timeAutonoetic consciousness
Political conservatism was associated with lower pro‐environmental attitudes, but also with greater concern for the future generations
Politics, concern for future generations, and the environment: Generativity mediates political conservatism and environmental attitudes. Michael D. Barnett William P. Archuleta Christina Cantu. Journal of Applied Social Psychology, August 10 2019. https://doi.org/10.1111/jasp.12624
Abstract: Climate change and pollution impact those alive today as well as future generations, suggesting that attitudes toward future generations may be linked with environmental attitudes. Despite the widespread impact of the environmental on human lives, there is considerable partisan divide in the United States with regards to environmental issues. We investigated relationships between political conservatism, generativity, and environmental attitudes in two studies (N = 429 and N = 618). Political conservatism was associated with lower pro‐environmental attitudes; however, political conservatism was also associated with higher generativity and had a positive indirect effect on pro‐environmental attitudes through higher generativity. More politically conservative individuals may have greater concern for future life and thereby have more pro‐environmental attitudes even while having lower pro‐environmental attitudes overall. These results likely reflect partisan polarization with regard to environmental issues. Pro‐environmental messages may be more persuasive for conservatives if they are linked to concerns about future generations.
Abstract: Climate change and pollution impact those alive today as well as future generations, suggesting that attitudes toward future generations may be linked with environmental attitudes. Despite the widespread impact of the environmental on human lives, there is considerable partisan divide in the United States with regards to environmental issues. We investigated relationships between political conservatism, generativity, and environmental attitudes in two studies (N = 429 and N = 618). Political conservatism was associated with lower pro‐environmental attitudes; however, political conservatism was also associated with higher generativity and had a positive indirect effect on pro‐environmental attitudes through higher generativity. More politically conservative individuals may have greater concern for future life and thereby have more pro‐environmental attitudes even while having lower pro‐environmental attitudes overall. These results likely reflect partisan polarization with regard to environmental issues. Pro‐environmental messages may be more persuasive for conservatives if they are linked to concerns about future generations.
From an evolutionary perspective, sexual stimuli are highly salient & are assumed to be processed with high priority, but impact is less than expected; men are higher propensity to distraction/interference
Attentional bias towards and distractibility by sexual cues: A meta-analytic integration. J. Strahler, A. M. Baranowski, B. Walter, N. Huebner, R. Stark. Neuroscience & Biobehavioral Reviews, August 12 2019. https://doi.org/10.1016/j.neubiorev.2019.07.015
Highlights
• Sexual cues bias and divert attention but the actual extent remains unclear.
• Greater attentional bias for sexual cues is assumed in men.
• 32 studies provided 41 effects sizes with 13 studies examining gender differences.
• Attentional bias to and distractibility by sexual cues was less than expected (gz = 0.43).
• Results implicated higher attentional bias/interference in men (gs = 0.29).
Abstract: From an evolutionary perspective, sexual stimuli are highly salient and are assumed to be processed with high priority. Hence, attentional processing of sexual cues is expected to not only bias attention but to also distract from other cognitive (foreground) tasks. It is, however, unclear to what extent these stimuli capture attention and whether there are differences between men and women. This meta-analysis combined the results of 32 studies employing experiments of attentional bias towards and distraction by sexual stimuli. From these, 13 studies provided data to examine gender differences. Overall, attentional bias and distractibility was lower than anticipated (gz = 0.43, p < .001) and there was support for the assumption of higher attention bias/interference in men (gs = 0.29, p = 0.031). Importantly, there was evidence for the presence of publication bias. With this in mind, findings are discussed in the context of stimulus features, the impact of provoked sexual arousal and motivational state, and gender-specific and -nonspecific neural processing of sexual stimuli which influence attention towards them.
Highlights
• Sexual cues bias and divert attention but the actual extent remains unclear.
• Greater attentional bias for sexual cues is assumed in men.
• 32 studies provided 41 effects sizes with 13 studies examining gender differences.
• Attentional bias to and distractibility by sexual cues was less than expected (gz = 0.43).
• Results implicated higher attentional bias/interference in men (gs = 0.29).
Abstract: From an evolutionary perspective, sexual stimuli are highly salient and are assumed to be processed with high priority. Hence, attentional processing of sexual cues is expected to not only bias attention but to also distract from other cognitive (foreground) tasks. It is, however, unclear to what extent these stimuli capture attention and whether there are differences between men and women. This meta-analysis combined the results of 32 studies employing experiments of attentional bias towards and distraction by sexual stimuli. From these, 13 studies provided data to examine gender differences. Overall, attentional bias and distractibility was lower than anticipated (gz = 0.43, p < .001) and there was support for the assumption of higher attention bias/interference in men (gs = 0.29, p = 0.031). Importantly, there was evidence for the presence of publication bias. With this in mind, findings are discussed in the context of stimulus features, the impact of provoked sexual arousal and motivational state, and gender-specific and -nonspecific neural processing of sexual stimuli which influence attention towards them.
Childhood obesity has grown from 5% in 1978 to 18.5% in 2016; the rate of increase in childhood obesity has slowed from 2004 to 2016
Understanding recent trends in childhood obesity in the United States. Patricia M. Anderson, Kristin F. Butcher, Diane Whitmore Schanzenbach. Economics & Human Biology, Volume 34, August 2019, Pages 16-25. https://doi.org/10.1016/j.ehb.2019.02.002
Highlights
• Childhood obesity has grown from 5% in 1978 to 18.5% in 2016.
• The rate of increase in childhood obesity has slowed from 2004 to 2016.
• Cohort-level obesity increases through age 10 and is steady through age 18.
• 5 year olds in 2010 were 2 percentage points more likely to be obese than in 1997.
• The rate of obesity growth from kindergarten to 3rd grade has recently declined.
Abstract: The prevalence of childhood obesity in the United States has more than tripled over the last four decades from 5 percent in 1978 to 18.5 percent in 2016. There is evidence for a break in trend in recent years: after growing from 0.4 to 0.7 percentage point per year between 1978 and 2004, the rate of increase has slowed to 0.1 percentage point per year from 2004 to 2016. To better understand these trends, in this paper we analyze a range of datasets that collect information on childhood obesity. We analyze the data overall, across the age distribution, across birth cohorts, and for subgroups of interest. We find steady increases in cohort-level obesity prevalence through approximately age 10, with levels unchanged thereafter, suggesting a need for additional interventions at early ages. We find that the prevalence of obesity has diverged by race and gender in recent years, especially among children entering kindergarten. Compared with 5-year-olds in 1997, 5-year-olds in 2010 were 2 percentage points more likely to be obese overall. Black and Hispanic 5-year-olds were 5 and 3 percentage points more likely to be obese, respectively, while whites had a 1 percentage point increase in obesity. However, overall and among all subgroups the rate of growth in obesity from kindergarten through 3rd grade has declined in recent years. Together, these findings can inform a future research literature that aims to target obesity interventions where they will be most impactful.
Highlights
• Childhood obesity has grown from 5% in 1978 to 18.5% in 2016.
• The rate of increase in childhood obesity has slowed from 2004 to 2016.
• Cohort-level obesity increases through age 10 and is steady through age 18.
• 5 year olds in 2010 were 2 percentage points more likely to be obese than in 1997.
• The rate of obesity growth from kindergarten to 3rd grade has recently declined.
Abstract: The prevalence of childhood obesity in the United States has more than tripled over the last four decades from 5 percent in 1978 to 18.5 percent in 2016. There is evidence for a break in trend in recent years: after growing from 0.4 to 0.7 percentage point per year between 1978 and 2004, the rate of increase has slowed to 0.1 percentage point per year from 2004 to 2016. To better understand these trends, in this paper we analyze a range of datasets that collect information on childhood obesity. We analyze the data overall, across the age distribution, across birth cohorts, and for subgroups of interest. We find steady increases in cohort-level obesity prevalence through approximately age 10, with levels unchanged thereafter, suggesting a need for additional interventions at early ages. We find that the prevalence of obesity has diverged by race and gender in recent years, especially among children entering kindergarten. Compared with 5-year-olds in 1997, 5-year-olds in 2010 were 2 percentage points more likely to be obese overall. Black and Hispanic 5-year-olds were 5 and 3 percentage points more likely to be obese, respectively, while whites had a 1 percentage point increase in obesity. However, overall and among all subgroups the rate of growth in obesity from kindergarten through 3rd grade has declined in recent years. Together, these findings can inform a future research literature that aims to target obesity interventions where they will be most impactful.
Individuals scoring high on dark personality exhibited a preference for inner-city, relative to suburban or rural living; no relationships between dark personality & the population densities of where participants had lived
Fido, Dean, Alice Rees, Philip Clarke, Dominic Petronzi, and Miles Richardson. 2019. “Examining the Connection Between Nature Connectedness and Dark Personality.” PsyArXiv. August 6. doi:10.31234/osf.io/shd7v
Abstract: The psychological construct of nature connectedness - the depth of an individual’s relationship with the natural world - has not only been associated with benefits for mental well-being but has also shown relationships with personality traits relevant to the dark personality literature. These include agreeableness, cognitive and affective empathy, and callous and uncaring traits. Across two independently-sampled studies we delineate relationships between explicit and implicit indices of nature connectedness and dark personality. In Study 1 (N = 304), psychopathy (and Machiavellianism) was associated with self-reported, but not implicitly-measured, nature connectedness. Moreover, individuals scoring high on dark personality exhibited a preference for inner-city, relative to suburban or rural living. In Study 2 (N = 209), we replicated the findings of Study 1 in relation to explicit measures of nature connectedness but did not find further relationships between dark personality and the population densities of where participants had previously lived. Limitations of implicit and pseudo indices of nature connectedness are outlined, and the results are discussed in relation to future research and the potential role of nature connectedness interventions in forensic populations. Pre-registration information: [https://osf.io/2bpwy]. Data, syntax, and manuscript pre-print: [https://osf.io/3mg5d/?view_only=b5c7749d4a7945c5a161f0915a2d0259].
Abstract: The psychological construct of nature connectedness - the depth of an individual’s relationship with the natural world - has not only been associated with benefits for mental well-being but has also shown relationships with personality traits relevant to the dark personality literature. These include agreeableness, cognitive and affective empathy, and callous and uncaring traits. Across two independently-sampled studies we delineate relationships between explicit and implicit indices of nature connectedness and dark personality. In Study 1 (N = 304), psychopathy (and Machiavellianism) was associated with self-reported, but not implicitly-measured, nature connectedness. Moreover, individuals scoring high on dark personality exhibited a preference for inner-city, relative to suburban or rural living. In Study 2 (N = 209), we replicated the findings of Study 1 in relation to explicit measures of nature connectedness but did not find further relationships between dark personality and the population densities of where participants had previously lived. Limitations of implicit and pseudo indices of nature connectedness are outlined, and the results are discussed in relation to future research and the potential role of nature connectedness interventions in forensic populations. Pre-registration information: [https://osf.io/2bpwy]. Data, syntax, and manuscript pre-print: [https://osf.io/3mg5d/?view_only=b5c7749d4a7945c5a161f0915a2d0259].
Homophily and minority-group size explain perception biases in social networks
Homophily and minority-group size explain perception biases in social networks. Eun Lee, Fariba Karimi, Claudia Wagner, Hang-Hyun Jo, Markus Strohmaier & Mirta Galesic. Nature Human Behaviour, August 12 2019, https://www.nature.com/articles/s41562-019-0677-4
Abstract: People’s perceptions about the size of minority groups in social networks can be biased, often showing systematic over- or underestimation. These social perception biases are often attributed to biased cognitive or motivational processes. Here we show that both over- and underestimation of the size of a minority group can emerge solely from structural properties of social networks. Using a generative network model, we show that these biases depend on the level of homophily, its asymmetric nature and on the size of the minority group. Our model predictions correspond well with empirical data from a cross-cultural survey and with numerical calculations from six real-world networks. We also identify circumstances under which individuals can reduce their biases by relying on perceptions of their neighbours. This work advances our understanding of the impact of network structure on social perception biases and offers a quantitative approach for addressing related issues in society.
Abstract: People’s perceptions about the size of minority groups in social networks can be biased, often showing systematic over- or underestimation. These social perception biases are often attributed to biased cognitive or motivational processes. Here we show that both over- and underestimation of the size of a minority group can emerge solely from structural properties of social networks. Using a generative network model, we show that these biases depend on the level of homophily, its asymmetric nature and on the size of the minority group. Our model predictions correspond well with empirical data from a cross-cultural survey and with numerical calculations from six real-world networks. We also identify circumstances under which individuals can reduce their biases by relying on perceptions of their neighbours. This work advances our understanding of the impact of network structure on social perception biases and offers a quantitative approach for addressing related issues in society.
Somatic perception of floor inclination
Somatic perception of floor inclination. Atsuki Higashiyama, Tadashi Yamazaki. Acta Psychologica, Volume 199, August 2019, 102896. https://doi.org/10.1016/j.actpsy.2019.102896
Abstract: We investigated somatically perceived inclination of a floor on which an observer was. In the first three experiments, using blindfolded observers, we determined the point of subjective equality (PSE) and the difference limen (DL) for horizontal floor. Orientation of the lying body relative to the axis around which the floor was rotated, distance of the lying body from the rotation axis, posture (standing, sitting, and lying), and age were varied. In the fourth experiment, effects of seeing the floor were examined. The mean PSEs were accurate within ±0.25° in all experiments. The mean DLs varied with condition: 1) The largest DLs were obtained for the blindfolded observers lying orthogonally or obliquely to the rotation axis, 2) the second largest DLs for the blindfolded observers lying parallel to the rotation axis, 3) medium DLs for the blindfolded observers sitting or standing, and 4) the smallest DLs for the standing observers with visual exposure to surroundings. In the last experiment, we determined a scale for inclination from verbally estimating apparent inclination with or without a blindfold. We concluded that the ratio of shear force to normal force was used for estimation of inclination. We discussed synergy of somatic inputs and visual inputs.
Abstract: We investigated somatically perceived inclination of a floor on which an observer was. In the first three experiments, using blindfolded observers, we determined the point of subjective equality (PSE) and the difference limen (DL) for horizontal floor. Orientation of the lying body relative to the axis around which the floor was rotated, distance of the lying body from the rotation axis, posture (standing, sitting, and lying), and age were varied. In the fourth experiment, effects of seeing the floor were examined. The mean PSEs were accurate within ±0.25° in all experiments. The mean DLs varied with condition: 1) The largest DLs were obtained for the blindfolded observers lying orthogonally or obliquely to the rotation axis, 2) the second largest DLs for the blindfolded observers lying parallel to the rotation axis, 3) medium DLs for the blindfolded observers sitting or standing, and 4) the smallest DLs for the standing observers with visual exposure to surroundings. In the last experiment, we determined a scale for inclination from verbally estimating apparent inclination with or without a blindfold. We concluded that the ratio of shear force to normal force was used for estimation of inclination. We discussed synergy of somatic inputs and visual inputs.
Socially excluded people indicate higher levels of darkness in perceptual judgments, & desire more brightness in a compensatory response; this coupling is not mediated by mood or needs but seems to exist more directly
Out of the dark, into the light: The impact of social exclusion on judgments of darkness and brightness. Michaela Pfundmair, Sarah K. Danböck, Maria Agthe. Acta Psychologica, Volume 199, August 2019, 102901. https://doi.org/10.1016/j.actpsy.2019.102901
Highlights
• Socially excluded people indicate higher levels of darkness in perceptual judgments.
• Socially excluded people desire more brightness in a compensatory response.
• This coupling is not mediated by mood or needs but seems to exist more directly.
Abstract: Based on theories of grounded cognition, we assumed that the experience of social exclusion is grounded in a concept of darkness. Specifically, we hypothesized that social exclusion causes perceptual judgments of darkness and a preference for brightness as a compensatory response. To investigate these hypotheses, we conducted four studies using different manipulations and measurements. In Studies 1a and 1b, excluded participants judged a picturized room as darker and drew more attention to its brightest part than included participants. In Study 2, excluded participants judged a surface as darker and decided for brighter clothing than included participants. In Study 3, excluded participants judged their lab room as darker and expressed a higher preference for brightness than included participants. Providing consistent support for our hypotheses, these findings confirm the idea that the experience of social exclusion is grounded in multiple ways that share a common representational system.
Highlights
• Socially excluded people indicate higher levels of darkness in perceptual judgments.
• Socially excluded people desire more brightness in a compensatory response.
• This coupling is not mediated by mood or needs but seems to exist more directly.
Abstract: Based on theories of grounded cognition, we assumed that the experience of social exclusion is grounded in a concept of darkness. Specifically, we hypothesized that social exclusion causes perceptual judgments of darkness and a preference for brightness as a compensatory response. To investigate these hypotheses, we conducted four studies using different manipulations and measurements. In Studies 1a and 1b, excluded participants judged a picturized room as darker and drew more attention to its brightest part than included participants. In Study 2, excluded participants judged a surface as darker and decided for brighter clothing than included participants. In Study 3, excluded participants judged their lab room as darker and expressed a higher preference for brightness than included participants. Providing consistent support for our hypotheses, these findings confirm the idea that the experience of social exclusion is grounded in multiple ways that share a common representational system.
Aversion to organs donated by suicide victims: The role of psychological essentialism
Aversion to organs donated by suicide victims: The role of psychological essentialism. Evan R. Balkcom et al. Cognition, Volume 192, November 2019, 104037. https://doi.org/10.1016/j.cognition.2019.104037
Abstract: People are known to be susceptible to psychological essentialism when reasoning about organ transplantation, believing that the mental characteristics of the donor will transfer to the recipient. Because psychological essentialism is exacerbated in negative social contexts (i.e., moral contagion bias), the effect may be especially apparent when people consider the impact of receiving organs from donors who died by stigmatized causes, such as suicide and homicide. In a forced-choice paradigm, participants overwhelmingly ranked a suicide victim as their least preferred donor, with accident victims being the most preferred donors and homicide victims the most common second choice. In a follow-up study, we investigated the psychological mechanisms underlying this unease about suicide donors. Compared to those who imagined receiving a heart from homicide or accident victims, participants who imagined a suicide donor expressed greater unease about the source of their transplant. The effect could not be explained by participants’ rumination about the source of the transplant, or by the explicitly perceived stigma of suicide, but did depend on their essentialist beliefs. Those who believed that negative or neutral (but not positive) traits of the donor could transfer to them were more hesitant about receiving a heart from a suicide relative to other donors. These data suggest that the bias against suicide organ donors is moderated by socially relevant essentialist beliefs.
Abstract: People are known to be susceptible to psychological essentialism when reasoning about organ transplantation, believing that the mental characteristics of the donor will transfer to the recipient. Because psychological essentialism is exacerbated in negative social contexts (i.e., moral contagion bias), the effect may be especially apparent when people consider the impact of receiving organs from donors who died by stigmatized causes, such as suicide and homicide. In a forced-choice paradigm, participants overwhelmingly ranked a suicide victim as their least preferred donor, with accident victims being the most preferred donors and homicide victims the most common second choice. In a follow-up study, we investigated the psychological mechanisms underlying this unease about suicide donors. Compared to those who imagined receiving a heart from homicide or accident victims, participants who imagined a suicide donor expressed greater unease about the source of their transplant. The effect could not be explained by participants’ rumination about the source of the transplant, or by the explicitly perceived stigma of suicide, but did depend on their essentialist beliefs. Those who believed that negative or neutral (but not positive) traits of the donor could transfer to them were more hesitant about receiving a heart from a suicide relative to other donors. These data suggest that the bias against suicide organ donors is moderated by socially relevant essentialist beliefs.
Informing and persuading conversational partners are still main functions of everyday conversations on mass media; we do rarely criticize mass media references of our conversational partners or introduce alternative media content
The role of mass media in everyday conversations: A comparison of two covert field observations. Nicole Podschuweit, Publizistik, August 2019, Volume 64, Issue 3, pp 303–327. https://link.springer.com/article/10.1007/s11616-019-00506-1
Abstract
This field study offers direct insights into how people deal with mass media content in their everyday communication on a broad empirical basis. It was inspired by a covert field observation Hans Mathias Kepplinger and Verena Martin conducted in the late 1970s. Back then, the authors concluded that interpersonal communication primarily reinforces mass media effects because interlocutors aim at informing and persuading their conversational partners by referring to mass media in most instances. During the last decades, many researchers in the field of media-stimulated interpersonal communication referred to their findings. However, this study is the first successful replication attempt. Furthermore, it represents a theoretical as well as a methodological extension of the pioneering study. The purpose of this elaborate and costly undertaking was to put the authors’ thesis of the mediating role of interpersonal communication to the empirical test.
The theoretical starting point are two basic assumptions: First, how strongly interpersonal communication intervenes in the process of mass media effects depends on how salient mass media content is in people’s everyday conversations. Second, whether interpersonal communication intervenes in the process of mass media effects as a mediator or a moderator depends on the consonance or dissonance of mass media’s presentation and interpersonal perception: If interlocutors pass mass media content on to others, interpersonal communication is supposed to reinforce mass media effects. However, if they strongly modify the mass media content they refer to, interpersonal communication is rather supposed to weaken or hinder mass media effects. Functions of media references for the group are supposed to be an important predictor for the role of interpersonal communication in the process of mass media effects. Reinforcing effects of interpersonal communication are especially likely when the interlocutors use mass media as “opportune witnesses” to inform others on facts or to convince them of a certain opinion. In view of the strong differentiation of today’s media scene, it was assumed that mass media content is now more often the subject of conversation than in the late 1970s; that media-stimulated interpersonal communication is increasingly fulfilling the function of affective processing of mass media content; that other interlocutors are more likely to respond with criticism or references to alternative media content.
To (re)define the role of interpersonal communication in the process of mass media effects, the study by Kepplinger and Martin (1986) was compared to a current covert field observation of everyday conversations. The current field study was conducted in spring 2016 in two medium-sized German cities. In both studies, small groups with two up to five members were observed in four different environments: (1) restaurants; (2) on the street, in public places and public transport; (3) at the university as well as (4) in private homes. Public conversations were captured in real time using a highly standardized coding scheme. Private conversations were first recorded and coded afterwards. In public, the observed interlocutors were debriefed. In the private sphere, interlocutors were additionally asked for their informed consents several days before the observation was conducted. The empirical analyses are based on 180 everyday conversations with 480 participants observed in 1979 as well as 1537 everyday conversations with 3961 participants captured in 2016.
Three key findings of the comparison between the two studies are: First, against the theoretical assumptions, mass media and their content are less salient in current everyday conversations than in times when media use focused on regional newspapers and public service broadcasting in Germany. An obvious explanation is that interpersonal intersection of media repertoires has become smaller in many conversational contexts. According to this study, it is largest in the private sphere, where people use mass media together most frequently and thus also talk about mass media most frequently. In public, the interlocutors usually generate a common meeting ground by focusing on private topics.
Second, television continues to play an important role in media-stimulated conversations. However, content of online mass media is at least as relevant for interpersonal communication today. While conversations on television are driven by a need for affective processing in the first instance, conversations on online mass media content primarily fulfill an informative function. From a methodological point of view, it is important to mention that the exact frequency of television and Internet references cannot by determined on the sole basis of an observational study. This is due to the fact that types of mass media can no longer be clearly differentiated by outside observers in the age of the Internet. Against this background, survey studies are a reasonable supplement.
Third, informing and persuading conversational partners are still main functions of everyday conversations on mass media. Although people can rely on a huge range of information today, they do still rarely criticize mass media references of their conversational partners or introduce alternative media content. Actually, the observed interlocutors mostly agreed with the mass media contents others referred to. The findings therefore suggest that interpersonal communication still mediates and thus strengthens mass media effects in the current mass media scene. With this study it has to be added, however, that mass media are often supposed to fulfill further functions for interpersonal communication, e.g., affective processing of mass media content.
Keywords: Interpersonal communication Mass communication Media-stimulated communication Covert field observation
Abstract
This field study offers direct insights into how people deal with mass media content in their everyday communication on a broad empirical basis. It was inspired by a covert field observation Hans Mathias Kepplinger and Verena Martin conducted in the late 1970s. Back then, the authors concluded that interpersonal communication primarily reinforces mass media effects because interlocutors aim at informing and persuading their conversational partners by referring to mass media in most instances. During the last decades, many researchers in the field of media-stimulated interpersonal communication referred to their findings. However, this study is the first successful replication attempt. Furthermore, it represents a theoretical as well as a methodological extension of the pioneering study. The purpose of this elaborate and costly undertaking was to put the authors’ thesis of the mediating role of interpersonal communication to the empirical test.
The theoretical starting point are two basic assumptions: First, how strongly interpersonal communication intervenes in the process of mass media effects depends on how salient mass media content is in people’s everyday conversations. Second, whether interpersonal communication intervenes in the process of mass media effects as a mediator or a moderator depends on the consonance or dissonance of mass media’s presentation and interpersonal perception: If interlocutors pass mass media content on to others, interpersonal communication is supposed to reinforce mass media effects. However, if they strongly modify the mass media content they refer to, interpersonal communication is rather supposed to weaken or hinder mass media effects. Functions of media references for the group are supposed to be an important predictor for the role of interpersonal communication in the process of mass media effects. Reinforcing effects of interpersonal communication are especially likely when the interlocutors use mass media as “opportune witnesses” to inform others on facts or to convince them of a certain opinion. In view of the strong differentiation of today’s media scene, it was assumed that mass media content is now more often the subject of conversation than in the late 1970s; that media-stimulated interpersonal communication is increasingly fulfilling the function of affective processing of mass media content; that other interlocutors are more likely to respond with criticism or references to alternative media content.
To (re)define the role of interpersonal communication in the process of mass media effects, the study by Kepplinger and Martin (1986) was compared to a current covert field observation of everyday conversations. The current field study was conducted in spring 2016 in two medium-sized German cities. In both studies, small groups with two up to five members were observed in four different environments: (1) restaurants; (2) on the street, in public places and public transport; (3) at the university as well as (4) in private homes. Public conversations were captured in real time using a highly standardized coding scheme. Private conversations were first recorded and coded afterwards. In public, the observed interlocutors were debriefed. In the private sphere, interlocutors were additionally asked for their informed consents several days before the observation was conducted. The empirical analyses are based on 180 everyday conversations with 480 participants observed in 1979 as well as 1537 everyday conversations with 3961 participants captured in 2016.
Three key findings of the comparison between the two studies are: First, against the theoretical assumptions, mass media and their content are less salient in current everyday conversations than in times when media use focused on regional newspapers and public service broadcasting in Germany. An obvious explanation is that interpersonal intersection of media repertoires has become smaller in many conversational contexts. According to this study, it is largest in the private sphere, where people use mass media together most frequently and thus also talk about mass media most frequently. In public, the interlocutors usually generate a common meeting ground by focusing on private topics.
Second, television continues to play an important role in media-stimulated conversations. However, content of online mass media is at least as relevant for interpersonal communication today. While conversations on television are driven by a need for affective processing in the first instance, conversations on online mass media content primarily fulfill an informative function. From a methodological point of view, it is important to mention that the exact frequency of television and Internet references cannot by determined on the sole basis of an observational study. This is due to the fact that types of mass media can no longer be clearly differentiated by outside observers in the age of the Internet. Against this background, survey studies are a reasonable supplement.
Third, informing and persuading conversational partners are still main functions of everyday conversations on mass media. Although people can rely on a huge range of information today, they do still rarely criticize mass media references of their conversational partners or introduce alternative media content. Actually, the observed interlocutors mostly agreed with the mass media contents others referred to. The findings therefore suggest that interpersonal communication still mediates and thus strengthens mass media effects in the current mass media scene. With this study it has to be added, however, that mass media are often supposed to fulfill further functions for interpersonal communication, e.g., affective processing of mass media content.
Keywords: Interpersonal communication Mass communication Media-stimulated communication Covert field observation
Sexual fantasies: More gender similarities than differences; when men and women differed, it was in specific sexual fantasies and interests rather than sexual experiences
More
than one flavour: University students’ specific sexual fantasies,
interests, and experiences. Pari-Gole Noorishad et al. The Canadian
Journal of Human Sexuality, Volume 28 Issue 2, August 2019, pp. 143-158.
https://doi.org/10.3138/cjhs.2019-0024
Abstract: Sexual fantasies, interests, and experiences are three important aspects of human sexual expression that likely are related yet distinct. Updated and comprehensive information on patterns in these three areas of sexual expression is important for developing knowledge on the extent to which fantasies are distinct from interests and experiences as well as whether social sexual norms are changing. Thus, the overall goal of this study was to explore patterns in university students’ sexual expression. Participants (N = 236; 65 men, 171 women) completed a background questionnaire and a measure of 43 specific sexual fantasies, interests, and experiences. We used Joyal, Cossette, and Lapierre’s (2015) categories to determine which specific fantasies, interests, and experiences were typical, common, uncommon, unusual, and rare. The results suggested that typical and common fantasies, interests, and experiences are those that fit with sexual norms and evolutionary pressures. However, some activities that fall outside of social norms, or evolutionary benefits, may be common or uncommon, rather than unusual or rare. For the most part, the prevalence and diversity of sexual fantasies aligned closely with sexual interests. We found more gender similarities than differences; when men and women differed, it was in specific sexual fantasies and interests rather than sexual experiences. Our findings suggest that young men and women fantasize about, are interested in, and engage in diverse sexual activities that are somewhat guided by social norms and evolutionary pressures. These findings provide novel, contemporary information on social norms, gender similarities, and diversity in young adults’ sexual expression.
KEY WORDS: Gender, sexual diversity, sexual experiences, sexual fantasies, sexual interests
Abstract: Sexual fantasies, interests, and experiences are three important aspects of human sexual expression that likely are related yet distinct. Updated and comprehensive information on patterns in these three areas of sexual expression is important for developing knowledge on the extent to which fantasies are distinct from interests and experiences as well as whether social sexual norms are changing. Thus, the overall goal of this study was to explore patterns in university students’ sexual expression. Participants (N = 236; 65 men, 171 women) completed a background questionnaire and a measure of 43 specific sexual fantasies, interests, and experiences. We used Joyal, Cossette, and Lapierre’s (2015) categories to determine which specific fantasies, interests, and experiences were typical, common, uncommon, unusual, and rare. The results suggested that typical and common fantasies, interests, and experiences are those that fit with sexual norms and evolutionary pressures. However, some activities that fall outside of social norms, or evolutionary benefits, may be common or uncommon, rather than unusual or rare. For the most part, the prevalence and diversity of sexual fantasies aligned closely with sexual interests. We found more gender similarities than differences; when men and women differed, it was in specific sexual fantasies and interests rather than sexual experiences. Our findings suggest that young men and women fantasize about, are interested in, and engage in diverse sexual activities that are somewhat guided by social norms and evolutionary pressures. These findings provide novel, contemporary information on social norms, gender similarities, and diversity in young adults’ sexual expression.
KEY WORDS: Gender, sexual diversity, sexual experiences, sexual fantasies, sexual interests
Sex dreams: Gender, erotophilia, and sociosexuality as predictors of content, valence, and frequency
Sex dreams: Gender, erotophilia, and sociosexuality as predictors of content, valence, and frequency. Amira Hmidan. The Canadian Journal of Human Sexuality, Volume 28 Issue 2, August 2019, pp. 177-189. https://doi.org/10.3138/cjhs.2019-0022
Abstract: The continuity hypothesis suggests that dream content is directly related to waking life experiences, personality traits, and gender; however, little is known about sexual dreaming. To address this gap, the current study examined how gender, sociosexuality (one’s willingness to engage in sexual relations outside of committed relationships) and erotophilia (a learned disposition to respond positively to sexual stimuli) related to the content, frequency, and valence of sexual dreams. Participants (n = 482) completed an online survey assessing their sex dream experiences, sociosexuality, and erotophilia and were asked to describe their most recent sexual dream. Men scored higher on sociosexuality and sex dream valence than women, but there were no gender differences in erotophilia or sex dream frequency. Individuals who scored higher on sociosexuality and erotophilia reported experiencing more frequent sex dreams and evaluated them more positively. Hierarchical regression analysis demonstrated that erotophilia and sociosexuality significantly predicted sex dream valence, accounting for 24.3% of the variance. The addition of gender at step 2 was significant, but only accounted for an additional 1.9% of the variance. Participants’ descriptions of their most recent sex dream were analyzed for common themes related to variables such as the partner(s) involved (most common: current partner), location (most common: house/apartment), and types of sexual behaviors involved (most common: kissing). Exploratory analyses, limitations, and future directions are discussed.
KEY WORDS: Dreaming, erotophilia, gender differences, sex dreams, sociosexuality
Abstract: The continuity hypothesis suggests that dream content is directly related to waking life experiences, personality traits, and gender; however, little is known about sexual dreaming. To address this gap, the current study examined how gender, sociosexuality (one’s willingness to engage in sexual relations outside of committed relationships) and erotophilia (a learned disposition to respond positively to sexual stimuli) related to the content, frequency, and valence of sexual dreams. Participants (n = 482) completed an online survey assessing their sex dream experiences, sociosexuality, and erotophilia and were asked to describe their most recent sexual dream. Men scored higher on sociosexuality and sex dream valence than women, but there were no gender differences in erotophilia or sex dream frequency. Individuals who scored higher on sociosexuality and erotophilia reported experiencing more frequent sex dreams and evaluated them more positively. Hierarchical regression analysis demonstrated that erotophilia and sociosexuality significantly predicted sex dream valence, accounting for 24.3% of the variance. The addition of gender at step 2 was significant, but only accounted for an additional 1.9% of the variance. Participants’ descriptions of their most recent sex dream were analyzed for common themes related to variables such as the partner(s) involved (most common: current partner), location (most common: house/apartment), and types of sexual behaviors involved (most common: kissing). Exploratory analyses, limitations, and future directions are discussed.
KEY WORDS: Dreaming, erotophilia, gender differences, sex dreams, sociosexuality
From 2018... When Intimate Partner Violence Meets Same Sex Couples: A Review of Same Sex Intimate Partner Violence
From 2018... When Intimate Partner Violence Meets Same Sex Couples: A Review of Same Sex Intimate Partner Violence. Luca Rollè, Giulia Giardina, Angela M. Caldarera, Eva Gerino and Piera Brustia. Front. Psychol., August 21 2018, https://doi.org/10.3389/fpsyg.2018.01506. Corrigendum: https://www.frontiersin.org/articles/10.3389/fpsyg.2019.01706/full
Abstract: Over the past few decades, the causes of and intervention for intimate partner violence (IPV) have been approached and studied. This paper presents a narrative review on IPV occurring in same sex couples, that is, same sex IPV (SSIPV). Despite the myth that IPV is exclusively an issue in heterosexual relationships, many studies have revealed the existence of IPV among lesbian and gay couples, and its incidence is comparable to (Turell, 2000) or higher than that among heterosexual couples (Messinger, 2011; Kelley et al., 2012). While similarities between heterosexual and lesbian, gay, and bisexual (LGB) IPV were found, unique features and dynamics were present in LGB IPV. Such features are mainly related to identification and treatment of SSIPV in the community and to the need of taking into consideration the role of sexual minority stressors. Our findings show there is a lack of studies that address LGB individuals involved in IPV; this is mostly due to the silence that has historically existed around violence in the LGB community, a silence built on fears and myths that have obstructed a public discussion on the phenomenon. We identified the main themes discussed in the published studies that we have reviewed here. The reviews lead us to the conclusion that it is essential to create a place where this subject can be freely discussed and approached, both by LGB and heterosexual people.
Abstract: Over the past few decades, the causes of and intervention for intimate partner violence (IPV) have been approached and studied. This paper presents a narrative review on IPV occurring in same sex couples, that is, same sex IPV (SSIPV). Despite the myth that IPV is exclusively an issue in heterosexual relationships, many studies have revealed the existence of IPV among lesbian and gay couples, and its incidence is comparable to (Turell, 2000) or higher than that among heterosexual couples (Messinger, 2011; Kelley et al., 2012). While similarities between heterosexual and lesbian, gay, and bisexual (LGB) IPV were found, unique features and dynamics were present in LGB IPV. Such features are mainly related to identification and treatment of SSIPV in the community and to the need of taking into consideration the role of sexual minority stressors. Our findings show there is a lack of studies that address LGB individuals involved in IPV; this is mostly due to the silence that has historically existed around violence in the LGB community, a silence built on fears and myths that have obstructed a public discussion on the phenomenon. We identified the main themes discussed in the published studies that we have reviewed here. The reviews lead us to the conclusion that it is essential to create a place where this subject can be freely discussed and approached, both by LGB and heterosexual people.
Monday, August 12, 2019
Peer Status Position within School-Based Hierarchies and Excessive Fat Accumulation in Adulthood—A 30 Year Follow up of a Stockholm Cohort
Rojas, Y.; Almquist, Y.B. Peer Status Position within School-Based Hierarchies and Excessive Fat Accumulation in Adulthood—A 30 Year Follow up of a Stockholm Cohort. Behav. Sci. 2019, 9, 85. August 9 2019. https://doi.org/10.3390/bs9080085
Abstract: Disadvantaged socioeconomic status is arguably the one exposure that has most consistently been linked to obesity, even more strongly so than diet and physical inactivity, which are the two main perceived root causes of weight gain. However, we still know very little about the relationship between having a disadvantaged social position and excessive fat accumulation, particularly when it comes to whether the relationship in question can also be seen as a long-term one, i.e., spanning from childhood to adulthood. By making use of the unique Stockholm Birth Cohort Multigenerational Study, the present study uses generalized ordered logistic regressions to examine the association between sociometrically assessed peer status position in school at age 13 and excessive fat accumulation at age 32. The results suggest that the odds of having excessive fat accumulation are about 0.5 times lower among popular and accepted children (ORs = 0.52 and 0.56, respectively), compared to those with a marginalized peer status position, independent of other obesogenic risk factors measured both prior and subsequent to peer status position. Our results give support to the notion that improved weight status may be another positive consequence of policies aiming to increase social inclusion within schools.
Keywords: body mass index (BMI); peer status; school; overweight; obesity; Sweden
Lizards prefer to defecate on the largest rock in the territory
Where to do number two: Lizards prefer to defecate on the largest rock in the territory. Simon Baeckens et al. Behavioural Processes, August 7 2019, 103937. https://doi.org/10.1016/j.beproc.2019.103937
Highlights
• In the lab, we examined defecation behaviour of wild-caught Dalmatian wall lizards
• Lizards preferred to defecate on the largest rock around
• Defecation site preference did not differ between sexes and among populations
• Faecal pellets deposited on large rocks may increase visual detectability of faeces
Abstract: Many animals use their excrements to communicate with others. In order to increase signal efficacy, animals often behaviourally select for specific defecation sites that maximize the detectability of their faecal deposits, such as the tip of rocks by some lizard species. However, the field conditions in which these observations are made make it difficult to reject alternative explanations of defecation site preference; rock tips may also provide better opportunities for thermoregulation, foraging, or escaping predators, and not solely for increasing the detectability of excrements. In addition, we still know little on whether lizard defecation behaviour varies within-species. In this laboratory study, we take an experimental approach to test defecation site preference of Podarcis melisellensis lizards in a standardized setting, and assess whether preferences differ between sexes, and among populations. Our findings show that in an environment where all stones provide equal thermoregulatory advantage, prey availability, and predator pressure, lizards still select for the largest stone in their territory as preferred defecation site. Moreover, we demonstrate that lizards’ defecation preference is a strong conservative behaviour, showing no significant intraspecific variation. Together, these findings corroborate the idea that lizards may defecate on prominent rocky substrates in order to increase (visual) detectability of the deposited faecal pellets.
Highlights
• In the lab, we examined defecation behaviour of wild-caught Dalmatian wall lizards
• Lizards preferred to defecate on the largest rock around
• Defecation site preference did not differ between sexes and among populations
• Faecal pellets deposited on large rocks may increase visual detectability of faeces
Abstract: Many animals use their excrements to communicate with others. In order to increase signal efficacy, animals often behaviourally select for specific defecation sites that maximize the detectability of their faecal deposits, such as the tip of rocks by some lizard species. However, the field conditions in which these observations are made make it difficult to reject alternative explanations of defecation site preference; rock tips may also provide better opportunities for thermoregulation, foraging, or escaping predators, and not solely for increasing the detectability of excrements. In addition, we still know little on whether lizard defecation behaviour varies within-species. In this laboratory study, we take an experimental approach to test defecation site preference of Podarcis melisellensis lizards in a standardized setting, and assess whether preferences differ between sexes, and among populations. Our findings show that in an environment where all stones provide equal thermoregulatory advantage, prey availability, and predator pressure, lizards still select for the largest stone in their territory as preferred defecation site. Moreover, we demonstrate that lizards’ defecation preference is a strong conservative behaviour, showing no significant intraspecific variation. Together, these findings corroborate the idea that lizards may defecate on prominent rocky substrates in order to increase (visual) detectability of the deposited faecal pellets.
Despite being frequently classified as a “basic” emotion, full-fledged disgust develops considerably later than all other basic emotions; being disgusting is heavily contingent upon cultural learning
Developing Disgust: Theory, Measurement, and Application. Joshua Rottman, Jasmine DeJesus, Heather Greenebaum. Handbook of Emotional Development pp 283-309, July 5 2019. https://link.springer.com/chapter/10.1007/978-3-030-17332-6_12
Abstract: Disgust is a complex and uncharacteristic emotion. Despite being frequently classified as a “basic” emotion, disgust has a wide range of elicitors, many competing functional theories, and a protracted developmental trajectory. This chapter first reviews several ultimate explanations of disgust, highlighting how scholars historically privileged symbolic explanations, while most contemporary researchers believe disgust to be an adaptive pathogen avoidance mechanism. After a brief discussion of techniques for measuring disgust, we describe the current knowledge of the development of disgust, with special attention to the ways in which disgust influences food choice and contributes to contamination sensitivity. While certain aspects of disgust may be universal, its emergence is largely enculturated and its expression is highly variable. We conclude by discussing the ways in which the study of disgust carries practical implications for the diagnosis and treatment of psychopathologies, for nutrition, and for the implementation of public health initiatives. Although scholarly interest in disgust has greatly increased during recent years, there is still much room for further exploration of this enigmatic emotion.
Keywords: Disgust Development Childhood Avoidance Disease Emotion Food
Abstract: Disgust is a complex and uncharacteristic emotion. Despite being frequently classified as a “basic” emotion, disgust has a wide range of elicitors, many competing functional theories, and a protracted developmental trajectory. This chapter first reviews several ultimate explanations of disgust, highlighting how scholars historically privileged symbolic explanations, while most contemporary researchers believe disgust to be an adaptive pathogen avoidance mechanism. After a brief discussion of techniques for measuring disgust, we describe the current knowledge of the development of disgust, with special attention to the ways in which disgust influences food choice and contributes to contamination sensitivity. While certain aspects of disgust may be universal, its emergence is largely enculturated and its expression is highly variable. We conclude by discussing the ways in which the study of disgust carries practical implications for the diagnosis and treatment of psychopathologies, for nutrition, and for the implementation of public health initiatives. Although scholarly interest in disgust has greatly increased during recent years, there is still much room for further exploration of this enigmatic emotion.
Keywords: Disgust Development Childhood Avoidance Disease Emotion Food
Sunday, August 11, 2019
How different type of comments (emotional/factual content, supportive/contradicting content, low/high number of likes) could influence the credibility of the associated information? Seems that nothing at all
Martončik, Marcel, and Matus Adamkovic. 2019. “Comments' Influence on Message Credibility.” PsyArXiv. July 31. doi:10.31234/osf.io/euj9m
Abstract: In the present era full of hoaxes, conspiracies, and fake news, the credibility of information is a necessary and important attribute that internet media, and especially news publishers, strive to achieve. It is natural that readers evaluate the trustworthiness of information they read. According to the previous research, such an evaluation could be influenced by many cues, for example, the presence of discussion comments, likes or shares. In the present article, we examine how different type of comments (emotional/factual content, supportive/contradicting content, low/high number of likes) could influence the credibility of the associated information. The research sample consisted of 924 participants from Slovakia. Using a path analysis and MANCOVA, none of the experimental conditions had a substantial effect on the perceived message credibility. The obtained results contradict the existing empirical evidence. One of the explanations of the null results might dwell in the underpowered design of the existing studies. Many of them have low sensitivity to detect even medium effects or are absenting any form of corrections of the family-wise error rate.
Abstract: In the present era full of hoaxes, conspiracies, and fake news, the credibility of information is a necessary and important attribute that internet media, and especially news publishers, strive to achieve. It is natural that readers evaluate the trustworthiness of information they read. According to the previous research, such an evaluation could be influenced by many cues, for example, the presence of discussion comments, likes or shares. In the present article, we examine how different type of comments (emotional/factual content, supportive/contradicting content, low/high number of likes) could influence the credibility of the associated information. The research sample consisted of 924 participants from Slovakia. Using a path analysis and MANCOVA, none of the experimental conditions had a substantial effect on the perceived message credibility. The obtained results contradict the existing empirical evidence. One of the explanations of the null results might dwell in the underpowered design of the existing studies. Many of them have low sensitivity to detect even medium effects or are absenting any form of corrections of the family-wise error rate.
Spider monkeys are more sensitive to the taste of ethanol than rats and humans, and they prefer ecologically relevant suprathreshold concentrations of ethanol over water
Taste responsiveness of spider monkeys to dietary ethanol. Daniel Dausch Ibañez, Laura Teresa Hernandez Salazar, Matthias Laska. Chemical Senses, August 11 2019, bjz049, https://doi.org/10.1093/chemse/bjz049
Abstract: Recent studies suggest that frugivorous primates might display a preference for the ethanol produced by microbia in overripe, fermenting fruit as an additional source of calories. We therefore assessed the taste responsiveness of eight spider monkeys (Ateles geoffroyi) to the range of ethanol concentrations found in overripe, fermenting fruit (0.05-3.0%) and determined taste preference thresholds as well as relative taste preferences for ethanol presented in sucrose solutions and in fruit matrices, respectively. Using a two-bottle preference test of short duration (1 min) we found that spider monkeys are able to detect ethanol concentrations as low as 0.5%, that they prefer ethanol concentrations up to 3% over water, and that they prefer sucrose solutions and pureed fruit spiked with ethanol over equimolar sucrose solutions and pureed fruit without ethanol. However, when presented with an ethanol-spiked sucrose solution and a higher-concentrated sucrose solution without ethanol the animals clearly preferred the latter, even when the sucrose-ethanol mixture contained three times more calories. These results demonstrate that spider monkeys are more sensitive to the taste of ethanol than rats and humans, and that they prefer ecologically relevant suprathreshold concentrations of ethanol over water. Tests with sucrose solutions and pureed fruits that were either spiked with ethanol or not suggest that sweetness may be more important for the preferences displayed by the spider monkeys than the calories provided by ethanol. The present results therefore do not support the notion that dietary ethanol might be used by frugivorous primates as a supplemental source of calories.
Keywords: dietary ethanol, taste preference threshold, relative taste preference, spider monkeys, Ateles geoffroyi
Abstract: Recent studies suggest that frugivorous primates might display a preference for the ethanol produced by microbia in overripe, fermenting fruit as an additional source of calories. We therefore assessed the taste responsiveness of eight spider monkeys (Ateles geoffroyi) to the range of ethanol concentrations found in overripe, fermenting fruit (0.05-3.0%) and determined taste preference thresholds as well as relative taste preferences for ethanol presented in sucrose solutions and in fruit matrices, respectively. Using a two-bottle preference test of short duration (1 min) we found that spider monkeys are able to detect ethanol concentrations as low as 0.5%, that they prefer ethanol concentrations up to 3% over water, and that they prefer sucrose solutions and pureed fruit spiked with ethanol over equimolar sucrose solutions and pureed fruit without ethanol. However, when presented with an ethanol-spiked sucrose solution and a higher-concentrated sucrose solution without ethanol the animals clearly preferred the latter, even when the sucrose-ethanol mixture contained three times more calories. These results demonstrate that spider monkeys are more sensitive to the taste of ethanol than rats and humans, and that they prefer ecologically relevant suprathreshold concentrations of ethanol over water. Tests with sucrose solutions and pureed fruits that were either spiked with ethanol or not suggest that sweetness may be more important for the preferences displayed by the spider monkeys than the calories provided by ethanol. The present results therefore do not support the notion that dietary ethanol might be used by frugivorous primates as a supplemental source of calories.
Keywords: dietary ethanol, taste preference threshold, relative taste preference, spider monkeys, Ateles geoffroyi
Orgasm, gender, and responses to heterosexual casual sex
Orgasm, gender, and responses to heterosexual casual sex. Jennifer L. Piemonte, Terri D. Conley, Staci Gusakova. Personality and Individual Differences, Volume 151, 1 December 2019, 109487. https://doi.org/10.1016/j.paid.2019.06.030
Abstract: There is a persistent gender difference in how positively young adults react to casual sex, with men reporting slightly more positive responses than women. Multiple factors have been studied as possible explanations for the gender difference, but nothing has completely accounted the variance between women and men's responses to casual sex. Although prior research identifies sexual pleasure as a primary factor associated with positive responses, women and men may understand or report on this construct differently due to gendered socialization, making it difficult to compare responses across groups. One measure that is less subject to subjective interpretation or response bias may be whether a person orgasms during a given casual sex encounter. In the present research, we test the relationships between gender, orgasm, and reactions following most recent casual sex encounter across three samples of young adults. Results indicate that orgasm mediates the gender difference in how positively participants respond to casual sex. Specifically, men are more likely to orgasm during casual sex, and people who orgasm during casual sex are more likely to experience positive reactions afterwards. Therefore, while gender may be one way to describe the discrepancy in how positive people feel following casual sex, orgasm explains it.
Keywords: Casual sexGender differencesEmotional reactionsOrgasmEmerging adults
Abstract: There is a persistent gender difference in how positively young adults react to casual sex, with men reporting slightly more positive responses than women. Multiple factors have been studied as possible explanations for the gender difference, but nothing has completely accounted the variance between women and men's responses to casual sex. Although prior research identifies sexual pleasure as a primary factor associated with positive responses, women and men may understand or report on this construct differently due to gendered socialization, making it difficult to compare responses across groups. One measure that is less subject to subjective interpretation or response bias may be whether a person orgasms during a given casual sex encounter. In the present research, we test the relationships between gender, orgasm, and reactions following most recent casual sex encounter across three samples of young adults. Results indicate that orgasm mediates the gender difference in how positively participants respond to casual sex. Specifically, men are more likely to orgasm during casual sex, and people who orgasm during casual sex are more likely to experience positive reactions afterwards. Therefore, while gender may be one way to describe the discrepancy in how positive people feel following casual sex, orgasm explains it.
Keywords: Casual sexGender differencesEmotional reactionsOrgasmEmerging adults
Parrots Voluntarily Help Each Other to Obtain Food Rewards
Brucks, Désirée and von Bayern, Auguste, Parrots Voluntarily Help Each Other to Obtain Food Rewards (July 26, 2019). CURRENT-BIOLOGY-D-19-01163. SSRN: http://dx.doi.org/10.2139/ssrn.3427278
Abstract: Helping others to obtain benefits, even at a cost to oneself (altruism), poses an evolutionary puzzle (Clutton-Brock 2009). While kin selection explains such ‘selfless’ acts amongst relatives, only reciprocity (paying back received favours) entails fitness benefits for unrelated individuals (Taborsky et al. 2016). So far, experimental evidence for both altruistic helping and reciprocal altruism has been reported in a few mammals but no avian species (Massen et al. 2015). In order to gain insights into the evolutionary origin of altruistic helping and reciprocity, the capacity for altruism of non-mammalian species needs to be investigated. We tested two parrot species in an instrumental helping paradigm involving ‘token transfer’. Here, actors could provide tokens to their neighbour, who could exchange them with an experimenter for food. To verify whether the parrots understood the task’s contingencies, we systematically varied the presence of a partner and the possibility for exchange. We found that African grey parrots voluntarily and spontaneously transferred tokens to conspecific partners, whereas significantly fewer transfers occurred in the control conditions. Additionally, transfers were affected by the strength of the dyads’ affiliation and partially by the receivers’ attention-getting behaviours. Furthermore, the birds reciprocated the help once the roles were reversed. Blue-headed macaws, in contrast, transferred hardly any tokens. Species differences in social tolerance might explain this discrepancy. These findings show that altruistic helping based on a prosocial attitude, accompanied but not necessarily sustained by reciprocity, is present in parrots, suggesting that this capacity evolved convergently in this avian group and mammals.
Keywords: altruism, altruistic helping, prosociality, parrots, reciprocity, social tolerance
Abstract: Helping others to obtain benefits, even at a cost to oneself (altruism), poses an evolutionary puzzle (Clutton-Brock 2009). While kin selection explains such ‘selfless’ acts amongst relatives, only reciprocity (paying back received favours) entails fitness benefits for unrelated individuals (Taborsky et al. 2016). So far, experimental evidence for both altruistic helping and reciprocal altruism has been reported in a few mammals but no avian species (Massen et al. 2015). In order to gain insights into the evolutionary origin of altruistic helping and reciprocity, the capacity for altruism of non-mammalian species needs to be investigated. We tested two parrot species in an instrumental helping paradigm involving ‘token transfer’. Here, actors could provide tokens to their neighbour, who could exchange them with an experimenter for food. To verify whether the parrots understood the task’s contingencies, we systematically varied the presence of a partner and the possibility for exchange. We found that African grey parrots voluntarily and spontaneously transferred tokens to conspecific partners, whereas significantly fewer transfers occurred in the control conditions. Additionally, transfers were affected by the strength of the dyads’ affiliation and partially by the receivers’ attention-getting behaviours. Furthermore, the birds reciprocated the help once the roles were reversed. Blue-headed macaws, in contrast, transferred hardly any tokens. Species differences in social tolerance might explain this discrepancy. These findings show that altruistic helping based on a prosocial attitude, accompanied but not necessarily sustained by reciprocity, is present in parrots, suggesting that this capacity evolved convergently in this avian group and mammals.
Keywords: altruism, altruistic helping, prosociality, parrots, reciprocity, social tolerance
School Enjoyment at Age 6 Predicts Later Educational Achievement as Strongly as Socioeconomic Background and Gender
Morris, Tim, Danny Dorling, Neil M. Davies, and George D. Smith. 2019. “School Enjoyment at Age 6 Predicts Later Educational Achievement as Strongly as Socioeconomic Background and Gender.” SocArXiv. August 10. doi:10.31235/osf.io/e6c37
Abstract: Education is influenced by a broad range of factors including socioeconomic background, cognitive ability, and the school environment. However, there has been limited research into the role that school enjoyment, particularly at the start of schooling, plays in the development of pupil’s education and their final attainment. In this study we used data from a UK cohort, the Avon Longitudinal Study of Parents and Children to answer three related research questions. Is school enjoyment patterned by gender, socioeconomic background of cognitive ability? How well does school enjoyment explain later educational attainment? Does early school enjoyment at age 6 explain social or gender differences in later educational attainment at age 16? Our results show that school enjoyment measured at age 6 associates with gender and cognitive ability, but not with family socioeconomic background. For example, girls were over two and half times more likely to report enjoying school than boys (OR: 2.62; 95% Confidence Interval: 2.11, 3.24). School enjoyment and later attainment were also associated, whereby pupils who reported enjoying school at both ages scored on average 29.9 (20.2, 39.6) more points, equivalent to a 5-grade increase across all GCSE’s, and were 72% more likely to obtain 5+ A*-C GCSE’s including Maths and English (OR: 1.69; 95% CI: 1.38, 2.08) than those who did not enjoy school. Differences in school enjoyment helped to statistically explain the gender attainment gap, with boys’ GCSE attainment more strongly linked to school enjoyment than girls. These results highlight the importance of school enjoyment for educational attainment. As a potentially more modifiable factor than socioeconomic background, cognitive ability or gender, school enjoyment may represent a promising intervention target for reducing educational inequalities and future experimental designs are required to test causation.
Abstract: Education is influenced by a broad range of factors including socioeconomic background, cognitive ability, and the school environment. However, there has been limited research into the role that school enjoyment, particularly at the start of schooling, plays in the development of pupil’s education and their final attainment. In this study we used data from a UK cohort, the Avon Longitudinal Study of Parents and Children to answer three related research questions. Is school enjoyment patterned by gender, socioeconomic background of cognitive ability? How well does school enjoyment explain later educational attainment? Does early school enjoyment at age 6 explain social or gender differences in later educational attainment at age 16? Our results show that school enjoyment measured at age 6 associates with gender and cognitive ability, but not with family socioeconomic background. For example, girls were over two and half times more likely to report enjoying school than boys (OR: 2.62; 95% Confidence Interval: 2.11, 3.24). School enjoyment and later attainment were also associated, whereby pupils who reported enjoying school at both ages scored on average 29.9 (20.2, 39.6) more points, equivalent to a 5-grade increase across all GCSE’s, and were 72% more likely to obtain 5+ A*-C GCSE’s including Maths and English (OR: 1.69; 95% CI: 1.38, 2.08) than those who did not enjoy school. Differences in school enjoyment helped to statistically explain the gender attainment gap, with boys’ GCSE attainment more strongly linked to school enjoyment than girls. These results highlight the importance of school enjoyment for educational attainment. As a potentially more modifiable factor than socioeconomic background, cognitive ability or gender, school enjoyment may represent a promising intervention target for reducing educational inequalities and future experimental designs are required to test causation.
Neural Responses to Sexual Stimuli in Heterosexual and Homosexual Men and Women: Men’s Responses Are More Specific
Neural Responses to Sexual Stimuli in Heterosexual and Homosexual Men and Women: Men’s Responses Are More Specific. Adam Safron et al. August 9 2019. https://link.springer.com/article/10.1007/s10508-019-01521-z
Abstract: Patterns of genital arousal in response to gendered sexual stimuli (i.e., sexual stimuli presenting members of only one sex at a time) are more predictive of men’s than of women’s sexual orientations. Additional lines of evidence may shed light on the nature of these differences. We measured neural activation in homosexual and heterosexual men and women using fMRI while they viewed three kinds of gendered sexual stimuli: pictures of nude individuals, pictures of same-sex couples interacting, and videos of individuals self-stimulating. The primary neural region of interest was the ventral striatum (VS), an area of central importance for reward processing. For all three kinds of stimuli and for both VS activation and self-report, men’s responses were more closely related to their sexual orientations compared with women’s. Furthermore, men showed a much greater tendency to respond more positively to stimuli featuring one sex than to stimuli featuring the other sex, leading to higher correlations among men’s responses as well as higher correlations between men’s responses and their sexual orientations. Whole-brain analyses identified several other regions showing a similar pattern to the VS, and none showed an opposite pattern. Because fMRI is measured identically in men and women, our results provide the most direct evidence to date that men’s sexual arousal patterns are more gender specific than women’s.
Keywords: Sexual orientation Sexual arousal fMRI Sex differences Ventral striatum Reward Category specificity
Abstract: Patterns of genital arousal in response to gendered sexual stimuli (i.e., sexual stimuli presenting members of only one sex at a time) are more predictive of men’s than of women’s sexual orientations. Additional lines of evidence may shed light on the nature of these differences. We measured neural activation in homosexual and heterosexual men and women using fMRI while they viewed three kinds of gendered sexual stimuli: pictures of nude individuals, pictures of same-sex couples interacting, and videos of individuals self-stimulating. The primary neural region of interest was the ventral striatum (VS), an area of central importance for reward processing. For all three kinds of stimuli and for both VS activation and self-report, men’s responses were more closely related to their sexual orientations compared with women’s. Furthermore, men showed a much greater tendency to respond more positively to stimuli featuring one sex than to stimuli featuring the other sex, leading to higher correlations among men’s responses as well as higher correlations between men’s responses and their sexual orientations. Whole-brain analyses identified several other regions showing a similar pattern to the VS, and none showed an opposite pattern. Because fMRI is measured identically in men and women, our results provide the most direct evidence to date that men’s sexual arousal patterns are more gender specific than women’s.
Keywords: Sexual orientation Sexual arousal fMRI Sex differences Ventral striatum Reward Category specificity
Singles of both sexes expedite reproduction: Shifts in sexual-timing strategies before and after the typical age of female menopause
Singles of both sexes expedite reproduction: Shifts in sexual-timing strategies before and after the typical age of female menopause. Samantha E. Cohen et al. Evolution and Human Behavior, August 10 2019. https://doi.org/10.1016/j.evolhumbehav.2019.08.001
Abstract: How do singles' strategies for engaging in sexual activity with a new partner vary across the adult lifespan? Using three large and independent demographically representative cross-sectional samples of heterosexual single adults in the U.S., we found that females approaching the typical age of menopause became less likely to establish relationship exclusivity prior to sexual activity with a new partner. However, after the typical age of menopausal onset, females returned to earlier levels of commitment choosiness. These changes in commitment choosiness surrounding the age of menopause were consistent across two studies (including a larger dataset combining two samples). Findings suggest that single females approaching menopause—a major life history milestone—alter their behavior to achieve reproductively relevant partnering goals but abandon this mating strategy once the typical reproductive period has ended. Males exhibited similar, though attenuated, changes in expected relationship commitment before sexual activity during midlife as well. Age-related changes in commitment corresponded with the amount of stress expressed regarding one's “biological clock”. However, reduced commitment choosiness did not vary with frequency of sexual thoughts, frequency of sexual behaviors, or external pressures to find a romantic partner. Results are discussed in terms of life history theory and sex differences in sexuality.
Keywords: Reproduction expeditingLife history theorySexual behaviorSexual timingMating strategiesMenopause
Saturday, August 10, 2019
Mate choice is generally regarded as an independent event; there is a growing evidence that it can be influenced by social information provided by conspecifics, including to copy mate choice or rejection
Factors that affect non-independent mate choice. Ryan C Scauzillo, Michael H Ferkin
Biological Journal of the Linnean Society, blz112, August 6 2019, https://doi.org/10.1093/biolinnean/blz112
Abstract: Mate choice is generally regarded as an independent event, but a growing body of evidence indicates that it can be influenced by social information provided by conspecifics. This is known as non-independent mate choice. Individuals use information gathered by observing interactions between conspecifics to copy or not copy the mate choice of these conspecifics. In this review, we examine the factors that affect non-independent mate choice and mate choice copying and how it is influenced by social and environmental information that is available to the subject or focal individual. Specifically, we discuss how non-independent mate choice and whether individuals copy the choices of conspecifics can be influenced by factors such as habitat and differences in ecology, mating system and parental care. We focus on the social information provided to the focal animal, the model and the audience. Nearly all studies of non-independent mate choice and mate copying have focused on individuals in species that use visual cues as the source of social information. Nevertheless, we highlight studies that indicate that individuals in some species may use chemical cues and signals as sources of social information that may affect non-independent mate choice and mate copying.
Keywords: audience effect context, focal individuals, mate choice copying, non-independent mate choice, social information
Biological Journal of the Linnean Society, blz112, August 6 2019, https://doi.org/10.1093/biolinnean/blz112
Abstract: Mate choice is generally regarded as an independent event, but a growing body of evidence indicates that it can be influenced by social information provided by conspecifics. This is known as non-independent mate choice. Individuals use information gathered by observing interactions between conspecifics to copy or not copy the mate choice of these conspecifics. In this review, we examine the factors that affect non-independent mate choice and mate choice copying and how it is influenced by social and environmental information that is available to the subject or focal individual. Specifically, we discuss how non-independent mate choice and whether individuals copy the choices of conspecifics can be influenced by factors such as habitat and differences in ecology, mating system and parental care. We focus on the social information provided to the focal animal, the model and the audience. Nearly all studies of non-independent mate choice and mate copying have focused on individuals in species that use visual cues as the source of social information. Nevertheless, we highlight studies that indicate that individuals in some species may use chemical cues and signals as sources of social information that may affect non-independent mate choice and mate copying.
Keywords: audience effect context, focal individuals, mate choice copying, non-independent mate choice, social information
Religiosity significantly correlated with self-report measures of prosociality (r = .15), but among samples using a behavioral measure of prosociality, the effect was only marginally significant (r = .04)
A meta-analysis of religious prosociality. Kelly, John Michael. Thesis, Univ of California at Irvine, 2019. https://escholarship.org/uc/item/74r7n99q
Abstract: This meta-analysis explores the longstanding and heavily debated question of whether religiosity is associated with prosocial and antisocial behavior. In an analysis of 179 effects across 89 samples, encompassing 167,508 participants, a significant relationship of r = .10 was found between religiosity and prosociality. However, substantial heterogeneity of methods was identified, and several potential moderators of this relationship were explored. The effect was most powerfully moderated by the type of measurement used to assess prosocial or antisocial behavior. Religiosity significantly correlated with self-report measures of prosociality at r = .15, but among samples using a behavioral measure of prosociality, the effect was only a marginally significant r = .04. Three possible explanations of this moderation are discussed, namely that 1) lab-based methods do not accurately capture religious prosociality; 2) the self-report effect is explained by religious self-enhancement; or 3) both religiosity and self-reported prosociality are explained by self-enhancement. Recommendations for future research are discussed that may help resolve these possible explanations. Other potential moderators are analyzed, including whether religiosity is differently related to prosocial and antisocial behavior.
Abstract: This meta-analysis explores the longstanding and heavily debated question of whether religiosity is associated with prosocial and antisocial behavior. In an analysis of 179 effects across 89 samples, encompassing 167,508 participants, a significant relationship of r = .10 was found between religiosity and prosociality. However, substantial heterogeneity of methods was identified, and several potential moderators of this relationship were explored. The effect was most powerfully moderated by the type of measurement used to assess prosocial or antisocial behavior. Religiosity significantly correlated with self-report measures of prosociality at r = .15, but among samples using a behavioral measure of prosociality, the effect was only a marginally significant r = .04. Three possible explanations of this moderation are discussed, namely that 1) lab-based methods do not accurately capture religious prosociality; 2) the self-report effect is explained by religious self-enhancement; or 3) both religiosity and self-reported prosociality are explained by self-enhancement. Recommendations for future research are discussed that may help resolve these possible explanations. Other potential moderators are analyzed, including whether religiosity is differently related to prosocial and antisocial behavior.
Users seek to maintain favorable impressions by balancing personal vs public information, maintaining a sense of authenticity; resending inspirational news seems to threaten that in Twitter
Spreading the Good News: Analyzing Socially Shared Inspirational News Content. Qihao Ji et al. Journalism & Mass Communication Quarterly, December 11, 2018. https://doi.org/10.1177/1077699018813096
Abstract: Past research indicates that people often share awe-inspiring news online. However, little is known about the content of those stories. In this study, more broadly defined “inspirational” articles shared through The New York Times website over a 6-month period were analyzed, with the goals of describing the content and identifying characteristics that might predict inspirationality and measures of retransmission. The results provided a snapshot of content found within inspirational news stories; they also revealed that self-transcendent language use predicted the inspirationality of a news story, as well as how long an article appeared on a most shared list.
Keywords: self-transcendent media experiences, inspirational media, news sharing, news retransmission, content analysis
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Twitter was the least likely platform for inspirational news retransmission [...] users generally seek to maintain favorable impressions by balancing the disclosure of personal versus public information, avoiding certain topics of discussion, and maintaining a sense of authenticity. Many inspirational stories might challenge that balance, perhaps being viewed as “too personal” for broadcasting platforms by some users. Such concerns would seemingly be minimized—or perhaps virtually nonexistent—when private or narrowcast communication means (like email) are used to share such content with specific individuals. Additional studies empirically testing these propositions are encouraged.
Abstract: Past research indicates that people often share awe-inspiring news online. However, little is known about the content of those stories. In this study, more broadly defined “inspirational” articles shared through The New York Times website over a 6-month period were analyzed, with the goals of describing the content and identifying characteristics that might predict inspirationality and measures of retransmission. The results provided a snapshot of content found within inspirational news stories; they also revealed that self-transcendent language use predicted the inspirationality of a news story, as well as how long an article appeared on a most shared list.
Keywords: self-transcendent media experiences, inspirational media, news sharing, news retransmission, content analysis
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Twitter was the least likely platform for inspirational news retransmission [...] users generally seek to maintain favorable impressions by balancing the disclosure of personal versus public information, avoiding certain topics of discussion, and maintaining a sense of authenticity. Many inspirational stories might challenge that balance, perhaps being viewed as “too personal” for broadcasting platforms by some users. Such concerns would seemingly be minimized—or perhaps virtually nonexistent—when private or narrowcast communication means (like email) are used to share such content with specific individuals. Additional studies empirically testing these propositions are encouraged.
Why We Verify a News Report? Lower intent to verify when we believe the headline is not true (because of low trust in the source or because it goes against our politics); we verify to win debates
When Do Audiences Verify? How Perceptions About Message and Source Influence Audience Verification of News Headlines. Stephanie Edgerly et al. Journalism & Mass Communication Quarterly, August 5, 2019. https://doi.org/10.1177/1077699019864680
Abstract: In today’s media landscape, people are encouraged to verify the news and information they encounter. Using an online experiment, this study explores audience’s intent to verify a news headline by manipulating whether the headline is true or false, from a source that varies in credibility, and perceived to be congruent or incongruent with participants’ partisanship. Results show that participants exhibit a higher intent to verify when they believe the headline is true, which is predicted by perceived congruency with preexisting ideological leanings. We discuss these findings in terms of the normative limitations of audience verification.
Keywords: audience verification, partisanship, news evaluations, motivated reasoning
Abstract: In today’s media landscape, people are encouraged to verify the news and information they encounter. Using an online experiment, this study explores audience’s intent to verify a news headline by manipulating whether the headline is true or false, from a source that varies in credibility, and perceived to be congruent or incongruent with participants’ partisanship. Results show that participants exhibit a higher intent to verify when they believe the headline is true, which is predicted by perceived congruency with preexisting ideological leanings. We discuss these findings in terms of the normative limitations of audience verification.
Keywords: audience verification, partisanship, news evaluations, motivated reasoning
Côté et al. argue that societies with a higher level of inequality foster a sense of entitlement in high-income individuals, which in turn leads them to be less generous; this last is not reproducible
Does economic inequality moderate the effect of class on prosocial behavior? A large-scale test of a recent hypothesis by Côté et al. Hagen von Hermanni, Andreas Tutić. PLOS, August 9, 2019. https://doi.org/10.1371/journal.pone.0220723
Abstract: Empirical research has provided mixed evidence regarding the question of whether higher social class promotes prosocial behavior. Recently, Côté et al. [1] hypothesized that these conflicting evidences might result from a hitherto neglected interaction between the individual’s level of income and the degree of inequality in one’s society. They argue that societies with a higher level of inequality foster a sense of entitlement in high-income individuals, which in turn leads them to be less generous. We put this reasoning to a large-scale test using observational data from the European Social Survey (ESS) and push the scope of our investigation towards a broader conception of social class, using next to income two additional measures of class. First, we examine whether high-class individuals in societies with high levels of inequality do in fact feel more entitled than their counterparts in more equal societies. While we find that an individual’s class and the disposition towards entitlement are strongly correlated, our results show a negative interaction with inequality, i.e. the effect of class on the personal sense of entitlement is weaker in societies with high levels of inequality. Second, we test whether the effect of class on prosocial behavior is moderated by economic inequality with respect to two real-life acts of prosocial behavior, namely engaging in volunteer work and donating money to a humanitarian organization. Our results indicate a substantial positive effect of class on prosocial behavior throughout, as well as a moderate, yet positive, interaction effect of class and inequality.
Abstract: Empirical research has provided mixed evidence regarding the question of whether higher social class promotes prosocial behavior. Recently, Côté et al. [1] hypothesized that these conflicting evidences might result from a hitherto neglected interaction between the individual’s level of income and the degree of inequality in one’s society. They argue that societies with a higher level of inequality foster a sense of entitlement in high-income individuals, which in turn leads them to be less generous. We put this reasoning to a large-scale test using observational data from the European Social Survey (ESS) and push the scope of our investigation towards a broader conception of social class, using next to income two additional measures of class. First, we examine whether high-class individuals in societies with high levels of inequality do in fact feel more entitled than their counterparts in more equal societies. While we find that an individual’s class and the disposition towards entitlement are strongly correlated, our results show a negative interaction with inequality, i.e. the effect of class on the personal sense of entitlement is weaker in societies with high levels of inequality. Second, we test whether the effect of class on prosocial behavior is moderated by economic inequality with respect to two real-life acts of prosocial behavior, namely engaging in volunteer work and donating money to a humanitarian organization. Our results indicate a substantial positive effect of class on prosocial behavior throughout, as well as a moderate, yet positive, interaction effect of class and inequality.
One proposed function of imagery is to make thoughts more emotionally evocative through sensory simulations; novel test of this theory utilizing a special population with no visual imagery: Aphantasia
The critical role of mental imagery in human emotion: insights from Aphantasia. Marcus Wicken, Rebecca Keogh, Joel Pearson. bioRxiv, Aug 6 2019. https://doi.org/10.1101/726844
Abstract: One proposed function of imagery is to make thoughts more emotionally evocative through sensory simulations. Here we report a novel test of this theory utilizing a special population with no visual imagery: Aphantasia. After using multi-method verification of aphantasia, we show that this condition, but not the general population, is associated with a flat-line physiological response to frightening written, but not perceptual scenarios, supporting imagery’s critical role in emotion.
Abstract: One proposed function of imagery is to make thoughts more emotionally evocative through sensory simulations. Here we report a novel test of this theory utilizing a special population with no visual imagery: Aphantasia. After using multi-method verification of aphantasia, we show that this condition, but not the general population, is associated with a flat-line physiological response to frightening written, but not perceptual scenarios, supporting imagery’s critical role in emotion.
Intelligence is a well-studied construct that has correlations with many educational, employment, & health outcomes; there is a lack of education in the area, & so incorrect beliefs about intelligence are widespread
Warne, Russell T., and Jared Z. Burton. 2019. “The Neglected Intelligence Course: Needs and Suggested Solutions.” PsyArXiv. January 8. doi:10.31234/osf.io/epu2s (https://psyarxiv.com/epu2s/)
Abstract: Intelligence is a well-studied construct in psychology that has correlational relationships with many educational, employment, and health outcomes. However, prior research indicates that incorrect beliefs about intelligence are widespread. In an effort to discern the degree to which the psychology curriculum is responsible for these inaccuracies, we collected course descriptions and catalog information from 303 American colleges and universities. We found that college courses dedicated to mainstream intelligence science are rare. Because the lack of intelligence education within psychology is a plausible contributor to incorrect beliefs about intelligence, we present an outline for a college-level course on intelligence. We also provide advice for implementing a course, including course readings and advice for handling controversies.
Abstract: Intelligence is a well-studied construct in psychology that has correlational relationships with many educational, employment, and health outcomes. However, prior research indicates that incorrect beliefs about intelligence are widespread. In an effort to discern the degree to which the psychology curriculum is responsible for these inaccuracies, we collected course descriptions and catalog information from 303 American colleges and universities. We found that college courses dedicated to mainstream intelligence science are rare. Because the lack of intelligence education within psychology is a plausible contributor to incorrect beliefs about intelligence, we present an outline for a college-level course on intelligence. We also provide advice for implementing a course, including course readings and advice for handling controversies.
The human imagination: the cognitive neuroscience of visual mental imagery
The human imagination: the cognitive neuroscience of visual mental imagery. Joel Pearson.
Nature Reviews Neuroscience (2019). August 5 2019. https://www.nature.com/articles/s41583-019-0202-9
Abstract: Mental imagery can be advantageous, unnecessary and even clinically disruptive. With methodological constraints now overcome, research has shown that visual imagery involves a network of brain areas from the frontal cortex to sensory areas, overlapping with the default mode network, and can function much like a weak version of afferent perception. Imagery vividness and strength range from completely absent (aphantasia) to photo-like (hyperphantasia). Both the anatomy and function of the primary visual cortex are related to visual imagery. The use of imagery as a tool has been linked to many compound cognitive processes and imagery plays both symptomatic and mechanistic roles in neurological and mental disorders and treatments.
Nature Reviews Neuroscience (2019). August 5 2019. https://www.nature.com/articles/s41583-019-0202-9
Abstract: Mental imagery can be advantageous, unnecessary and even clinically disruptive. With methodological constraints now overcome, research has shown that visual imagery involves a network of brain areas from the frontal cortex to sensory areas, overlapping with the default mode network, and can function much like a weak version of afferent perception. Imagery vividness and strength range from completely absent (aphantasia) to photo-like (hyperphantasia). Both the anatomy and function of the primary visual cortex are related to visual imagery. The use of imagery as a tool has been linked to many compound cognitive processes and imagery plays both symptomatic and mechanistic roles in neurological and mental disorders and treatments.
Friday, August 9, 2019
Among tens of thousands of camgirls (seen 35+ mn times per day), competition is won by those clothed with their face fully shown; it seems men prefer some slow-building 'courtship'
Laura Johnsen, Isaac Cormier, Maryanne L. Fisher (2019). An Ethological Study of Camgirls: Plentiful, Sexually Available Virtual Women for Hire. Human Ethology, 34(Suppl.), HES39, Aug 2019. https:// doi.org/10.22330/he/34/suppl
ABSTRACT: Camgirls are defined as “young women that operate their own webcams to communicate with a broad audience online, often engaging in explicit behaviour in real-time in return for financial compensation” (Bleakley, 2014, p. 893). The number of camgirls is staggering; LiveJasmin.com reported over 2000 models at any given moment, with 35-40 million daily visitors in 2017. The unfettered access to live-action explicit performances can be overwhelming for viewers, and given that there are numerous websites, and therefore tens of thousands of camgirls, there is competition amongst the performers to solicit interest from viewers. We examined the various behaviours camgirls use to obtain viewers and explore whether their appearance and behaviors reflect evolutionary themes regarding mate preferences. Data were collected from the models featured on the homepage of a popular live streaming adult webcam platform. Over seven days, we took screenshots of the first 15 camgirls on the homepage of the site twice a day. We coded their behaviors (ranging from clothed with no stimulation to fully nude with stimulation), facial appearance (e.g., full face shown, partial face shown, face not shown), and body type. Number of views per show were also recorded. Preliminary analysis suggests that camgirls that are clothed and have their face fully shown have a higher number of viewers than those with full nudity or partial face covering. This may indicate that an appealing aspect of camgirls is related to the viewer engaging in a slow-building ‘courtship’ that ends with a sexual interaction as opposed to viewing the camgirls in mid-performance for a brief sexual release.
ABSTRACT: Camgirls are defined as “young women that operate their own webcams to communicate with a broad audience online, often engaging in explicit behaviour in real-time in return for financial compensation” (Bleakley, 2014, p. 893). The number of camgirls is staggering; LiveJasmin.com reported over 2000 models at any given moment, with 35-40 million daily visitors in 2017. The unfettered access to live-action explicit performances can be overwhelming for viewers, and given that there are numerous websites, and therefore tens of thousands of camgirls, there is competition amongst the performers to solicit interest from viewers. We examined the various behaviours camgirls use to obtain viewers and explore whether their appearance and behaviors reflect evolutionary themes regarding mate preferences. Data were collected from the models featured on the homepage of a popular live streaming adult webcam platform. Over seven days, we took screenshots of the first 15 camgirls on the homepage of the site twice a day. We coded their behaviors (ranging from clothed with no stimulation to fully nude with stimulation), facial appearance (e.g., full face shown, partial face shown, face not shown), and body type. Number of views per show were also recorded. Preliminary analysis suggests that camgirls that are clothed and have their face fully shown have a higher number of viewers than those with full nudity or partial face covering. This may indicate that an appealing aspect of camgirls is related to the viewer engaging in a slow-building ‘courtship’ that ends with a sexual interaction as opposed to viewing the camgirls in mid-performance for a brief sexual release.
Is the global prevalence rate of adult mental illness increasing? Systematic review and meta‐analysis says no.
Is the global prevalence rate of adult mental illness increasing? Systematic review and meta‐analysis. Dirk Richter, Abbie Wall, Ashley Bruen, Richard Whittington. Acta Psychiatrica Scandinavica, August 8 2019. https://doi.org/10.1111/acps.13083
Abstract
Objectives: The question whether mental illness prevalence rates are increasing is a controversially debated topic. Epidemiological articles and review publications that look into this research issue are often compromised by methodological problems. The present study aimed at using a meta‐analysis technique that is usually applied for the analysis of intervention studies to achieve more transparency and statistical precision.
Objectives: The question whether mental illness prevalence rates are increasing is a controversially debated topic. Epidemiological articles and review publications that look into this research issue are often compromised by methodological problems. The present study aimed at using a meta‐analysis technique that is usually applied for the analysis of intervention studies to achieve more transparency and statistical precision.
Methods: We searched Pubmed, PsycInfo, CINAHL, Google Scholar and reference lists for repeated cross‐sectional population studies on prevalence rates of adult mental illness based on ICD‐ or DSM‐based diagnoses, symptom scales and distress scales that used the same methodological approach at least twice in the same geographical region. The study is registered with PROSPERO (CRD42018090959).
Results: We included 44 samples from 42 publications, representing 1,035,697 primary observations for the first time point and 783,897 primary observations for the second and last time point. Studies were conducted between 1978 and 2015. Controlling for a hierarchical data structure, we found an overall global prevalence increase odds ratio of 1.179 (95%‐CI: 1.065 – 1.305). A multivariate meta‐regression suggested relevant associations with methodological characteristics of included studies.
Conclusions: We conclude that the prevalence increase of adult mental illness is small and we assume that this increase is mainly related to demographic changes.
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