Conroy-Beam, D., & Buss, D. M. (2019). Why is age so important in human mating? Evolved age preferences and their influences on multiple mating behaviors. Evolutionary Behavioral Sciences, 13(2), 127-157. http://dx.doi.org/10.1037/ebs0000127
Abstract: Evolutionary theorizing suggests that chronological age, because it is so strongly linked with key reproductive qualities like fertility, should be an exceptionally consequential variable in mate selection. We review voluminous evidence for mate preferences for age and the substantial and varied behavioral sequelae of those preferences. These include (a) in actual marriage decisions, men choose younger wives, and women choose older husbands, on average in all of the dozens of cultures studied; (b) in personal advertisements, men and women seek partners consistent with their expressed age preferences; (c) chronological age determines number of “hits” received in online dating services; (d) the age of potential bride influences the amount of money spent on premarriage customs; (e) men’s mate retention effort, including commitment manipulation, resource provisioning, and intrasexual threats, is significantly predicted by the wife’s age; and (f) chronological age is an important sex-linked cause of divorce. The far-reaching ramifications of age also extend to (g) tactics of intrasexual competition, (h) predictors of mate value discrepancies, (i) victims of sex crimes, and (j) prostitution patterns. Finally, chronological age predicts (k) probability of remarriage, and (l) the age gap between grooms and brides upon remarriage. We synthesize evidence from diverse methods, across different cultures, and over time spans of centuries. Massive converging evidence provides a powerful, yet complex, understanding of the evolutionary importance of age in multiple mating outcomes over the human life span.
Popular version: What We Know About Age Gaps in Dating, Love, and Marriage. Theresa E DiDonato. Psychology Today, Apr 10, 2019. https://www.psychologytoday.com/ca/blog/meet-catch-and-keep/201904/what-we-know-about-age-gaps-in-dating-love-and-marriage
Wednesday, April 10, 2019
Those with posttraumatic stress disorder frequently experience unwanted memories of their traumas, even when making explicit efforts to avoid them, while healthy individuals can suppress those memories
Behavioral and neural correlates of memory suppression in PTSD. Danielle R. Sullivan et al. Journal of Psychiatric Research, Volume 112, May 2019, Pages 30-37. https://doi.org/10.1016/j.jpsychires.2019.02.015
Highlights
• Trauma exposure is associated with behavioral difficulties in memory suppression.
• Right middle frontal gyrus activity is reduced during memory suppression after trauma exposure.
• Trait suppression is negatively correlated with reduced right middle frontal gyrus activity.
Abstract: Previous work has shown that healthy individuals can actively suppress emotional memories through recruitment of the lateral prefrontal cortex. By contrast, individuals with posttraumatic stress disorder (PTSD) frequently experience unwanted memories of their traumatic experiences, even when making explicit efforts to avoid them. However, little is known regarding the behavioral and neural effects of memory suppression among individuals with PTSD. We examined memory suppression associated with PTSD using the Think-No-Think paradigm in an event-related functional magnetic resonance imaging (fMRI) study. We studied three groups: PTSD (n = 16), trauma exposure without PTSD (n = 19), and controls (i.e., no trauma exposure or PTSD; n = 13). There was a main effect of memory suppression such that participants remembered fewer face-picture pairs during the suppress condition than the remember condition. However, trauma-exposed participants (regardless of PTSD status) were less likely to successfully suppress memory than non-trauma-exposed controls. Neuroimaging data revealed that trauma-exposed individuals showed reduced activation in the right middle frontal gyrus during memory suppression. These results suggest that trauma exposure is associated with neural and behavioral disruptions in memory suppression and point to the possibility that difficulty in active suppression of memories may be just one of several likely factors contributing to the development of PTSD.
Highlights
• Trauma exposure is associated with behavioral difficulties in memory suppression.
• Right middle frontal gyrus activity is reduced during memory suppression after trauma exposure.
• Trait suppression is negatively correlated with reduced right middle frontal gyrus activity.
Abstract: Previous work has shown that healthy individuals can actively suppress emotional memories through recruitment of the lateral prefrontal cortex. By contrast, individuals with posttraumatic stress disorder (PTSD) frequently experience unwanted memories of their traumatic experiences, even when making explicit efforts to avoid them. However, little is known regarding the behavioral and neural effects of memory suppression among individuals with PTSD. We examined memory suppression associated with PTSD using the Think-No-Think paradigm in an event-related functional magnetic resonance imaging (fMRI) study. We studied three groups: PTSD (n = 16), trauma exposure without PTSD (n = 19), and controls (i.e., no trauma exposure or PTSD; n = 13). There was a main effect of memory suppression such that participants remembered fewer face-picture pairs during the suppress condition than the remember condition. However, trauma-exposed participants (regardless of PTSD status) were less likely to successfully suppress memory than non-trauma-exposed controls. Neuroimaging data revealed that trauma-exposed individuals showed reduced activation in the right middle frontal gyrus during memory suppression. These results suggest that trauma exposure is associated with neural and behavioral disruptions in memory suppression and point to the possibility that difficulty in active suppression of memories may be just one of several likely factors contributing to the development of PTSD.
We see evidence of an evolutionary design supportive of attachment as well as reproductive exigencies of procreative well-being; there is an ethological case to be made for considering pornography use as a public health risk
Procreative well-being and pornography – analyzing the script. Public health implications revealed through an ethological lens. Mark H. Butler.Marriage & Family Review, Apr 9 2019. https://doi.org/10.1080/01494929.2019.1588187
Abstract: An ethological model of human procreative well-being is proposed and the goodness-of-fit of pornography’s script to that model is considered. Deducing an evolutionary template for procreative well-being from an ethological analysis links attachment dynamics to procreative success. Alongside parent–child attachment, pair-bond attachment in the procreative couple looms large as an element of optimal procreative relationship structure and quality. Key elements of pair-bond attachment are documented. Turning next to an empirical examination of the sexual behavioral system in humans, we see evidence of an evolutionary design supportive of attachment as well as reproductive exigencies of procreative well-being. Sexual system mechanisms promoting both reproduction and attachment are evident in the evolutionary design. We next employ script theory to identify key elements of the sexual script promulgated by pornography. Joining these two analyses, we compare the evolutionary, attachment-based template for procreative success in juxtaposition to pornography’s sexual script to evaluate the goodness-of-fit of pornography use to attachment success and, by extension, procreative well-being. We conclude that there is an ethological case to be made for considering pornography use as a public health risk. Implications of the model of procreative well-being for the practice of couple therapy are given mention.
Keywords: attachment, ethology, family, marriage, pornography, procreative well-being, sexual behavioral system, sociobiology
Abstract: An ethological model of human procreative well-being is proposed and the goodness-of-fit of pornography’s script to that model is considered. Deducing an evolutionary template for procreative well-being from an ethological analysis links attachment dynamics to procreative success. Alongside parent–child attachment, pair-bond attachment in the procreative couple looms large as an element of optimal procreative relationship structure and quality. Key elements of pair-bond attachment are documented. Turning next to an empirical examination of the sexual behavioral system in humans, we see evidence of an evolutionary design supportive of attachment as well as reproductive exigencies of procreative well-being. Sexual system mechanisms promoting both reproduction and attachment are evident in the evolutionary design. We next employ script theory to identify key elements of the sexual script promulgated by pornography. Joining these two analyses, we compare the evolutionary, attachment-based template for procreative success in juxtaposition to pornography’s sexual script to evaluate the goodness-of-fit of pornography use to attachment success and, by extension, procreative well-being. We conclude that there is an ethological case to be made for considering pornography use as a public health risk. Implications of the model of procreative well-being for the practice of couple therapy are given mention.
Keywords: attachment, ethology, family, marriage, pornography, procreative well-being, sexual behavioral system, sociobiology
Long-term benefit of Microbiota Transfer Therapy on autism symptoms and gut/fecal microbiota
Long-term benefit of Microbiota Transfer Therapy on autism symptoms and gut microbiota. Dae-Wook Kang, James B. Adams, Devon M. Coleman, Elena L. Pollard, Juan Maldonado, Sharon McDonough-Means, J. Gregory Caporaso & Rosa Krajmalnik-Brown. Scientific Reports, volume 9, Article number: 5821 (2019). Apr 9. https://www.nature.com/articles/s41598-019-42183-0
Abstract: Many studies have reported abnormal gut microbiota in individuals with Autism Spectrum Disorders (ASD), suggesting a link between gut microbiome and autism-like behaviors. Modifying the gut microbiome is a potential route to improve gastrointestinal (GI) and behavioral symptoms in children with ASD, and fecal microbiota transplant could transform the dysbiotic gut microbiome toward a healthy one by delivering a large number of commensal microbes from a healthy donor. We previously performed an open-label trial of Microbiota Transfer Therapy (MTT) that combined antibiotics, a bowel cleanse, a stomach-acid suppressant, and fecal microbiota transplant, and observed significant improvements in GI symptoms, autism-related symptoms, and gut microbiota. Here, we report on a follow-up with the same 18 participants two years after treatment was completed. Notably, most improvements in GI symptoms were maintained, and autism-related symptoms improved even more after the end of treatment. Important changes in gut microbiota at the end of treatment remained at follow-up, including significant increases in bacterial diversity and relative abundances of Bifidobacteria and Prevotella. Our observations demonstrate the long-term safety and efficacy of MTT as a potential therapy to treat children with ASD who have GI problems, and warrant a double-blind, placebo-controlled trial in the future.
Abstract: Many studies have reported abnormal gut microbiota in individuals with Autism Spectrum Disorders (ASD), suggesting a link between gut microbiome and autism-like behaviors. Modifying the gut microbiome is a potential route to improve gastrointestinal (GI) and behavioral symptoms in children with ASD, and fecal microbiota transplant could transform the dysbiotic gut microbiome toward a healthy one by delivering a large number of commensal microbes from a healthy donor. We previously performed an open-label trial of Microbiota Transfer Therapy (MTT) that combined antibiotics, a bowel cleanse, a stomach-acid suppressant, and fecal microbiota transplant, and observed significant improvements in GI symptoms, autism-related symptoms, and gut microbiota. Here, we report on a follow-up with the same 18 participants two years after treatment was completed. Notably, most improvements in GI symptoms were maintained, and autism-related symptoms improved even more after the end of treatment. Important changes in gut microbiota at the end of treatment remained at follow-up, including significant increases in bacterial diversity and relative abundances of Bifidobacteria and Prevotella. Our observations demonstrate the long-term safety and efficacy of MTT as a potential therapy to treat children with ASD who have GI problems, and warrant a double-blind, placebo-controlled trial in the future.
From 2018: Concern for Group Reputation Increases Prosociality in Young Children
From 2018: Concern for Group Reputation Increases Prosociality in Young Children. Jan M. Engelmann, Esther Herrmann, Michael Tomasello. Psychol Sci. 2018 Feb;29(2):181-190. doi: 10.1177/0956797617733830
Abstract: The motivation to build and maintain a positive personal reputation promotes prosocial behavior. But individuals also identify with their groups, and so it is possible that the desire to maintain or enhance group reputation may have similar effects. Here, we show that 5-year-old children actively invest in the reputation of their group by acting more generously when their group’s reputation is at stake. Children shared significantly more resources with fictitious other children not only when their individual donations were public rather than private but also when their group’s donations (effacing individual donations) were public rather than private. These results provide the first experimental evidence that concern for group reputation can lead to higher levels of prosociality.
Keywords: cooperation, reputation, group reputation, open data
Check also Botto, Sara Valencia, & Rochat, Philippe. (2018). Sensitivity to the evaluation of others emerges by 24 months. Developmental Psychology, 54(9), 1723-1734. https://www.bipartisanalliance.com/2018/08/children-reproduced-outcomes-that-were.html
Abstract: The motivation to build and maintain a positive personal reputation promotes prosocial behavior. But individuals also identify with their groups, and so it is possible that the desire to maintain or enhance group reputation may have similar effects. Here, we show that 5-year-old children actively invest in the reputation of their group by acting more generously when their group’s reputation is at stake. Children shared significantly more resources with fictitious other children not only when their individual donations were public rather than private but also when their group’s donations (effacing individual donations) were public rather than private. These results provide the first experimental evidence that concern for group reputation can lead to higher levels of prosociality.
Keywords: cooperation, reputation, group reputation, open data
Check also Botto, Sara Valencia, & Rochat, Philippe. (2018). Sensitivity to the evaluation of others emerges by 24 months. Developmental Psychology, 54(9), 1723-1734. https://www.bipartisanalliance.com/2018/08/children-reproduced-outcomes-that-were.html
Angry people are more likely to engage in debates with those of similar & opposing views, & seek out information confirming their views more frequently; anxious individuals tend to seek out information contradicting their opinions
Anger, Fear, and Echo Chambers: The Emotional Basis for Online Behavior. Dag Wollebæk et al. Social Media + Society, April 9, 2019. https://doi.org/10.1177/2056305119829859
Abstract: Emotions, such as anger and fear, have been shown to influence people’s political behavior. However, few studies link emotions specifically to how people debate political issues and seek political information online. In this article, we examine how anger and fear are related to politics-oriented digital behavior, attempting to bridge the gap between the thus far disconnected literature on political psychology and the digital media. Based on survey data, we show that anger and fear are connected to distinct behaviors online. Angry people are more likely to engage in debates with people having both similar and opposing views. They also seek out information confirming their views more frequently. Anxious individuals, by contrast, tend to seek out information contradicting their opinions. These findings reiterate predictions made in the extant literature concerning the role of emotions in politics. Thus, we argue that anger reinforces echo chamber dynamics and trench warfare dynamics in the digital public sphere, while fear counteracts these dynamics.
Keywords: emotions, echo chambers, trench warfare dynamics, anger, anxiety, online political behavior
Abstract: Emotions, such as anger and fear, have been shown to influence people’s political behavior. However, few studies link emotions specifically to how people debate political issues and seek political information online. In this article, we examine how anger and fear are related to politics-oriented digital behavior, attempting to bridge the gap between the thus far disconnected literature on political psychology and the digital media. Based on survey data, we show that anger and fear are connected to distinct behaviors online. Angry people are more likely to engage in debates with people having both similar and opposing views. They also seek out information confirming their views more frequently. Anxious individuals, by contrast, tend to seek out information contradicting their opinions. These findings reiterate predictions made in the extant literature concerning the role of emotions in politics. Thus, we argue that anger reinforces echo chamber dynamics and trench warfare dynamics in the digital public sphere, while fear counteracts these dynamics.
Keywords: emotions, echo chambers, trench warfare dynamics, anger, anxiety, online political behavior
Genetic selection/concentration is not an explanation for neighbourhood gradients in obesity & mental health problems; a modest genetic selection/concentration was evident for teen pregnancy and poor educational outcomes
Genetics and the geography of health, behaviour and attainment. Daniel W. Belsky, Avshalom Caspi, Louise Arseneault, David L. Corcoran, Benjamin W. Domingue, Kathleen Mullan Harris, Renate M. Houts, Jonathan S. Mill, Terrie E. Moffitt, Joseph Prinz, Karen Sugden, Jasmin Wertz, Benjamin Williams & Candice L. Odgers. Nature Human Behaviour (2019), April 8 2019, https://www.nature.com/articles/s41562-019-0562-1
Abstract: Young people’s life chances can be predicted by characteristics of their neighbourhood1. Children growing up in disadvantaged neighbourhoods exhibit worse physical and mental health and suffer poorer educational and economic outcomes than children growing up in advantaged neighbourhoods. Increasing recognition that aspects of social inequalities tend, in fact, to be geographical inequalities2,3,4,5 is stimulating research and focusing policy interest on the role of place in shaping health, behaviour and social outcomes. Where neighbourhood effects are causal, neighbourhood-level interventions can be effective. Where neighbourhood effects reflect selection of families with different characteristics into different neighbourhoods, interventions should instead target families or individuals directly. To test how selection may affect different neighbourhood-linked problems, we linked neighbourhood data with genetic, health and social outcome data for >7,000 European-descent UK and US young people in the E-Risk and Add Health studies. We tested selection/concentration of genetic risks for obesity, schizophrenia, teen pregnancy and poor educational outcomes in high-risk neighbourhoods, including genetic analysis of neighbourhood mobility. Findings argue against genetic selection/concentration as an explanation for neighbourhood gradients in obesity and mental health problems. By contrast, modest genetic selection/concentration was evident for teen pregnancy and poor educational outcomes, suggesting that neighbourhood effects for these outcomes should be interpreted with care.
Abstract: Young people’s life chances can be predicted by characteristics of their neighbourhood1. Children growing up in disadvantaged neighbourhoods exhibit worse physical and mental health and suffer poorer educational and economic outcomes than children growing up in advantaged neighbourhoods. Increasing recognition that aspects of social inequalities tend, in fact, to be geographical inequalities2,3,4,5 is stimulating research and focusing policy interest on the role of place in shaping health, behaviour and social outcomes. Where neighbourhood effects are causal, neighbourhood-level interventions can be effective. Where neighbourhood effects reflect selection of families with different characteristics into different neighbourhoods, interventions should instead target families or individuals directly. To test how selection may affect different neighbourhood-linked problems, we linked neighbourhood data with genetic, health and social outcome data for >7,000 European-descent UK and US young people in the E-Risk and Add Health studies. We tested selection/concentration of genetic risks for obesity, schizophrenia, teen pregnancy and poor educational outcomes in high-risk neighbourhoods, including genetic analysis of neighbourhood mobility. Findings argue against genetic selection/concentration as an explanation for neighbourhood gradients in obesity and mental health problems. By contrast, modest genetic selection/concentration was evident for teen pregnancy and poor educational outcomes, suggesting that neighbourhood effects for these outcomes should be interpreted with care.
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