Not as cold as a fish... Relationships between the Dark Triad personality traits and affective experience during the day

As cold as a fish? Relationships between the Dark Triad personality traits and affective experience during the day: A day reconstruction study. Irena Pilch. PLOS, February 25, 2020. https://doi.org/10.1371/journal.pone.0229625

Abstract: The Dark Triad of personality is a cluster of three socially aversive personality traits: Machiavellianism, narcissism and psychopathy. These traits are associated with a selfish, aggressive and exploitative interpersonal strategy. The objective of the current study was to establish relationships between the Dark Triad traits (and their dimensions) and momentary affect. Machiavellianism, grandiose narcissism, vulnerable narcissism and the dimensions of the Triarchic model of psychopathy (namely, boldness, meanness and disinhibition) were examined. We used the Day Reconstruction Method, which is based on reconstructing affective states experienced during the previous day. The final sample consisted of 270 university students providing affective ratings of 3047 diary episodes. Analyses using multilevel modelling showed that only boldness had a positive association with positive affective states and affect balance, and a negative association with negative affective states. Grandiose narcissism and its sub-dimensions had no relationship with momentary affect. The other dark traits were related to negative momentary affect and/or inversely related to positive momentary affect and affect balance. As a whole, our results empirically demonstrated distinctiveness of the Dark Triad traits in their relationship to everyday affective states. These findings are not congruent with the notion that people with the Dark Triad traits, who have a dispositional tendency to manipulate and exploit others, are generally cold and invulnerable to negative feelings. The associations between the Dark Triad and momentary affect were discussed in the contexts of evolutionary and positive psychology, in relation to the role and adaptive value of positive and negative emotions experienced by individuals higher in Machiavellianism, narcissism and psychopathy.

Discussion

The aim of the present study was to examine relationships between affective states in everyday life and dark personality traits. The associations between momentary affect and the Dark Triad were investigated using the DRM, a well-validated instrument for the measurement of daily life experience. This method enables assessing affective states within natural situations during a chosen day of one’s life. In the current study, it was assumed that narcissism and psychopathy were multidimensional constructs. The results provide evidence about the relationships of the Dark Triad with momentary affect, supporting the majority of the predictions.
According to the results, dark traits or their dimensions showed specific associations with momentary affect: momentary PA was positively related to boldness and negatively related to vulnerable narcissism, meanness and Machiavellianism; momentary NA was positively related to vulnerable narcissism, disinhibition and Machiavellianism, and also inversely related to boldness. Affect balance showed associations with boldness (positive) and with vulnerable narcissism, Machiavellianism, disinhibition and meanness (negative). These and other results of the present study are discussed below separately for Machiavellianism, narcissism and psychopathy using evolutionary theory and adaptationist approach to emotions.

Machiavellianism

When formulating the hypothesis on the association of Machiavellianism with momentary affect, we pointed out the inconsistency between the “cool syndrome” (traditionally considered a main feature of high Machs’ emotionality; [50]) and the results of many studies that revealed the positive correlations of Machiavellianism with neuroticism [e.g., 52]. In the current study, we obtained the predicted positive associations between Machiavellianism and momentary NA, and the negative associations of Machiavellianism with momentary PA and affect balance. These results did not support the conviction about “cold” and “smart” Machiavellians who can control successfully their emotions and “get what they want” form other people (see [50]).
In fact, in the description of the Machiavellian personality made in a classic work by Christie and Geis [50], there seems to be a discrepancy between the above features of high Machs and their very pessimistic view of the world where people are susceptible to manipulation, but they are also cunning and constantly lurking for someone’s mistake or a moment of inattention to achieve their goals at his or her expense. Such a worldview may create constant pressure on Machiavellians who (in their opinion) have to continuously defend themselves against other people. Because the Mach IV scale (in which at least 1/3 of items concerns views on people in general, e.g., “Most people are basically good and kind,” inversely scored) is still used as a measure of Machiavellianism, these negative beliefs are crucial to the assessment although the descriptions of the construct sometimes emphasize only manipulation, not views. On the other hand, one should not be surprised that the inhabitants of the Machiavellian, “dog-eat-dog” world tended to feel more negative and less positive emotions in everyday life, which appeared in our study. According to an evolutionary approach to emotions, “negative emotions motivate the organism to avoid misfortune by escaping, attacking, or preventing harm or by repairing damage” [124] (p. 132), so these emotions seem useful for Machiavellians, constantly surrounded by “enemies.” At the same time, such a tendency may be characterized as lower emotional well-being, which is in line with the results of many studies [e.g., 19,20].
Several current studies have provided arguments supporting the assumption about some kind of emotional vulnerability of people higher in Machiavellianism. In a study by Szijjarto & Bereczkei [39], Machiavellianism was connected with difficulties to express and understand one’s own emotions, but also with emotional instability and ability to experience strong emotions. Inability to express feelings can favor a manipulator. It is due to the fact that it is more difficult for others to catch them. However, it may also cause some costs for a Machiavellian. For instance, this inability can be an obstacle to communication in different situations (not only in close relationships). The recent study [125] has demonstrated the unexpected results, contradictory to the idea of “cold” Machiavellians: Machiavellianism positively predicted break-up distress in romantic relationships. Findings of some other studies may be reinterpreted when the assumed Machiavellian “vulnerability” is taken into account. For example, high Machs tended to engage in cheating only when the risk of being caught is small [126], which can be an effect of high levels of negative emotions experienced. The relationship between Machiavellianism and anxiety sensitivity to social concerns (concern of being rejected by others; [127]) may be partly a result of a Machiavellian view of social life and fear of retaliation. Jonason et al. [17] hypothesized that long-term strategizing (e.g., a delay of gratifications) may be an additional source of stress for Machiavellians, which can be associated with poor health outcomes. The negative relationship between Machiavellianism and various psychological and physical health indicators [17,128,129] is also in line with our hypothesis of Machiavellian vulnerability. In general, negative emotions (conceptualized as defensive mechanisms) can protect Machiavellian individuals from danger and increase their individual fitness. At the same time, this may generate considerable costs for persons higher in Machiavellianism in terms of health and emotional well-being.

Narcissism

Grandiose narcissism is connected with traits that can promote experiencing positive emotions, such as high self-esteem, extraversion and low neuroticism [46]. However, in our study this dimension of narcissism showed no relationships with momentary affect. Also none of the facets of grandiose narcissism was a significant predictor of affect.
In the present study participants were asked to state whether they were alone or with others in a given situation. Starting from the assumption that being with other people, who can give attention, respect, or admiration, may be more rewarding for the participants with higher grandiose narcissism than for those with lower grandiose narcissism (see [123]), we tested the prediction that grandiose narcissism may serve as a moderator of the association between positive affect and the type of social situation (alone vs. with others). The results provided some support for this prediction: Grandiose Exhibitionism, which is good indicator of narcissistic grandiosity [112], was responsible for this moderation.
The specificity of grandiose narcissism is that narcissistic individuals prefer other people’s company because they constantly seek attention and admiration of others in order to maintain their grandiose self-views [130]. Grandiose narcissists can benefit from experiencing positive affective states in the presence of others because it can help them to avoid catching signals of criticism, a lack of acceptance, or other potential sources of ego threats and enhance the effectiveness of self-presentation (see [131]). Positive affect may help narcissists maintain positive illusions about their own attractiveness, which “may compel narcissists to indiscriminately pursue short-term mating strategy beyond their realistic prospects” [132] (p. 213). Positive emotions shared by individuals build friendship, alliances and family bonds [133]. Moreover, persons who express more positive emotions are rated more positively and people generally prefer interacting with those who have a good mood [134]. Thus, it seems that a tendency to feel more positive emotions while with others can be adaptive for individuals higher in narcissism and increase the effectiveness of the narcissistic strategy.
There has been an unresolved discussion in psychology on whether grandiose narcissism should be treated as an adaptive or maladaptive trait. Our results do not support any conclusions regarding this issue. However, the lack of a main effect of grandiose narcissism (and its sub-dimensions) on momentary PA and momentary NA and a moderating effect of grandiose narcissism (and Grandiose Exhibitionism) on the relationship between being alone or with others and momentary PA encourage us to consider other possible contextual moderators, such as types of situation, communication or interpersonal relationships.
Vulnerable narcissism is defined by such features as neuroticism, anxiety and a tendency to feel high negative affect and low positive affect, and these relationships were replicated in many cross-sectional studies [e.g., 46]. The results of our study provided support to the idea that these tendencies are also observed in everyday life. When considered alone, vulnerable narcissism was relatively the strongest predictor of momentary NA. Additionally, unfavorable affect balance was observed. Since affect is regarded as an important component of subjective well-being, this pattern of relationships prompted the conclusion that this type of a narcissist may pay the highest personal costs related to the emotional aspect of well-being out of all dark personalities due to the emotional vulnerability. On the other hand, narcissistic behavioral strategy is based on exploitation of others; however, vulnerable narcissism is associated with experiencing difficulties in establishing and maintaining interpersonal relationships [135]. Thus, some of these negative emotional states can result in inhibiting the unrealistic aspirations and demands in the name of security (e.g., to prevent the loss of a partner), which can be viewed as adaptive.

Psychopathy

The triarchic model of psychopathy [73], which was adopted in the current study, proposes boldness (“fearless dominance”,) defined as more “positive” phenotypic expression of fearless temperament, as a dimension of psychopathy. According to the findings of the present study, boldness was the only component of psychopathy (and the only dark trait) that turned out to be positively related to momentary PA and affect balance and negatively related to momentary NA. In other words, only boldness exhibited a pattern of relationships with momentary affect that can be considered psychologically beneficial for a “bold” individual, and that can also be interpreted in terms of higher subjective well-being. The possible biologically adaptive value of positive emotions is also important. Positive emotional states communicate that an individual is safe, healthy, full of energy, so he or she is able to take more risks and make good use of to gain valuable resources. This finding is consistent with earlier studies that demonstrated similar relationships between boldness and a trait positive/negative affect, resiliency [92,89], and well-being [90]. Although boldness is also considered to be connected with diminished physiological and emotional responsiveness [91], our study did not confirm this in relation to positive affective states.
According to our results, disinhibition was associated with momentary NA and negatively with affect balance, so it predicted more negative affective states and unfavorable affect balance. However, momentary PA was not related to disinhibition. The relationship between disinhibition and momentary NA was relatively strong and remained significant after controlling for all the Dark Triad traits. Disinhibition embodies this type of psychopathy that is not related to blunted emotional reactivity [91] but is associated with poor emotional control and irresponsible and impulsive behavior [e.g., 136]. This can lead to situations resulting in distress and negative feelings. However, even persistent negative emotional states can be understood as “an adaptive response to unfavorable circumstances” ([137] p. 100). Thus, taking into account evolutionary functions of emotions, these negative emotional states experienced by disinhibited individuals could prevent them from too risky behavior, which can be beneficial for them (i.e., improve their fitness).
Contrary to the predictions, meanness was not associated with momentary NA. The prediction about negative association between meanness and momentary NA was made based on the characteristics of meanness as callous-unemotional aspect of psychopathy and taking into account the results of previous studies on relationships between this dimension and trait negative affectivity. Meanness as a “callous-unemotional” dimension of psychopathy was connected with deficits in experiencing fear and some other negative emotions [e.g., 138]. However, the findings of other studies on triarchic psychopathy showed different patterns of correlations between meanness and some characteristics associated with negative affectivity. For example, in a study by Brislin et al. [139] no relationship was obtained between trait negative affect and meanness in an incarcerated group, and in a community group this relationship was positive. In a recent meta-analysis [89], despite the fact that triarchic meanness was strongly associated with other models of psychopathy and relevant criteria, it was also positively related to neuroticism, Negative Affectivity as measured by the Personality Inventory for the DSM-5, and internalizing symptoms (anxiety and depression). Additionally, the findings regarding internalizing symptoms turned out highly overlapping for meanness and disinhibition [89]. These meta-analytic findings allow believing that the lack of negative associations between meanness and momentary NA in the current study may be partly the effect of the specificity of measurement of the triarchic meanness. It is also possible that the levels of participants’ meanness were not large enough to demonstrate the expected effects in our group or that the indicators of momentary NA used in the current study were not optimal in the case of meanness as correlations between this psychopathy dimension and particular negative emotional states may be different (e.g., negative for fear and positive for anger).
Meanness turned out to be a negative predictor of momentary PA, which was not anticipated, and remained significant when the Dark Triad traits were considered together. Deficits in experiencing positive emotions are rather not assigned to psychopathy, but some studies showed deficient processing of positive emotional stimuli [138]. The negative relationship between meanness and PA may be also associated with the above-mentioned overlap between triarchic meanness and disinhibition. Overall, our results are in line with the idea that meanness can be connected with poverty of emotional experience, however, our evidence is weak.
A different way to interpret the differences regarding emotions is to analyze more basic personality elements that are behind the particular dark traits and their dimensions [140]. The traits which are shared by all the DT constructs constitute the so-called “dark core” [141,142] that includes Honesty-Humility, disagreeableness [8,143–145], callousness [146], and antagonism [141]. These common features, in themselves, cannot be responsible for differences in emotions. Nevertheless, both the behavior components and other traits may be specific for particular dark personalities. For example, disinhibition, vulnerable narcissism and, to a lesser degree, Machiavellianism are associated with higher neuroticism and introversion [45,52,73], which promotes experiencing negative emotions. Conversely, boldness and grandiose narcissism are related to extraversion, agency, social dominance and high self-esteem [68,73], which can promote positive emotions on different ways [147,148]. However, in the current study, it was the case only for boldness.

Conclusions and limitations

In summary, we investigated the relationships between the Dark Triad and momentary affective states utilizing an ecologically valid method. Our findings contribute to the literature by clarifying how the Dark Triad traits are related to everyday emotional experience. Different patterns of relationships of momentary PA, momentary NA and affect balance with the dark personality constructs were obtained. The two dimensions of narcissism demonstrated different relationships with daily affectivity and the same was true for the three dimensions of psychopathy and Machiavellianism. The Dark Triad traits explained together a noticeable part of momentary NA variance (21%), but their associations with PA were weaker.
On the basis of our results, only boldness was associated with positive affective states, which seems beneficial to an individual. The participants with higher levels of vulnerable narcissism, disinhibition and Machiavellianism were predisposed to more negative and less positive affect and their affect balance may be seen as unfavorable to them in a given situation. These results can be interpreted in the framework of evolutionary psychology. We speculate that the differences in momentary affect obtained in the current study reflect different behavioral strategies used in daily life by individuals. A tendency to feel negative emotions that was observed in Machiavellian and disinhibited persons and vulnerable narcissists may be conducive to achieving their goals by increasing caution and mistrust in dealing with others, which may reduce the risk of being disclosed and protect against risking too much. In turn, the positive emotions of bold individuals can make it easier to take risks when the situation is favorable whereas the positive emotions of grandiose narcissists (experienced in the presence of others) can make it easier to gain attention, acceptance or admiration.
The current study was the first that investigated everyday affective states in relation to narcissism, Machiavellianism and psychopathy simultaneously. The results confirmed the existence of different patterns of relationships between the Dark Triad traits and momentary affect. The significant overlap between the Dark Triad traits, found in numerous research studies, triggers a discussion whether there is a need of considering all these traits. It is especially important in the case of Machiavellianism and psychopathy because of the “dark dyad” hypothesis [20,149,150] that emphasizes the importance of the similarity between these constructs and their separateness from narcissism. Our results do not support this hypothesis and the idea that Machiavellianism and psychopathy measure the same construct (see [151]) because of the lack of similarity between Machiavellianism and the dimensions of triarchic psychopathy with reference to momentary affect. The relationships of Machiavellianism with momentary affect were congruent with the results for vulnerable narcissism rather than those for psychopathy dimensions. In reference to triarchic psychopathy, the current findings provided support for theory and previous research, confirming the distinctiveness of the three dimensions of psychopathy and the specificity of boldness (as a “positive” psychopathic trait) in the domain of affective functioning. Taken as a whole, the current findings seem to support the appropriateness of multidimensional approach to investigating psychopathy and narcissism as elements of the Dark Triad as a way to deal with the excessive overlap of Machiavellianism and unidimensional psychopathy.
The present study has several limitations. Firstly, it relies on data from a convenience sample of university students, which limits the generalization of the results.
Secondly, all data were obtained from self-report, which has some disadvantages. Personality constructs are commonly measured using self-report questionnaires [152]. To minimize common method biases we applied several techniques recommended by Podsakoff, MacKenzie, Lee and Podsakoff [153]. Well-established and valid questionnaires were chosen to reduce statement ambiguity. Each questionnaire was placed separately with a separate instruction. Participants’ anonymity was preserved in the data collection process, which could reduce social desirability bias. However, multi-method assessment could be valuable for future studies and self-report data should be complemented by informant ratings or behavioral observation [154]. Thirdly, to minimize participants’ burden and increase the accuracy of completing the “diary,” only a few emotional words have been used to assess momentary affect. Future studies should address this issue by using a larger and more representative set of emotional words. Moreover, a dimensional perspective on emotional experience, which was adopted in our study, is only one of the possible perspectives. From an evolutionary point of view, emotions can be understood as solutions to specific ecological problems. Therefore, it would be recommended for future studies to examine relationships between the Dark Triad traits and the particular emotional states using the categorical approach to emotions [155,156]. Fourthly, the relatively low reliability coefficients (Cronbach’s alphas) were obtained for the HSNS and NPI, which can reduce statistical power. Nevertheless, in the current study, the relationships between vulnerable narcissism (HSNS) and affect were significant and consistent with the predictions. Generally, the HSNS is regarded as a well-established and valid measure of narcissistic vulnerability. However, it cannot be excluded that lower reliability of the NPI could attenuate the relationships between the NPI and affect. Fifthly, despite the fact that the DRM was developed to reduce memory biases, it cannot be excluded that such biases could occur and influence the result of the current study [157].
To summarize, in this study relationships between the Dark Triad traits and daily emotional experience were investigated. In general, dark traits (except boldness) were not related to momentary positive affect, but most of them were associated with higher levels of momentary negative affect. In particular, persons higher in Machiavellianism, vulnerable narcissism and disinhibition share a tendency to experience more negative affect during a day. This tendency may lower their subjective well-being, but it can also be interpreted as a defense mechanism protecting them from taking (too) risky actions and decisions.

The overall effect of manipulating cognitive resources to promote the “intuitive” system at the expense of the “deliberative” system is very close to zero

Altruism, fast and slow? Evidence from a meta-analysis and a new experiment. Hanna Fromell, Daniele Nosenzo & Trudy Owens. Experimental Economics, February 25 2020. https://link.springer.com/article/10.1007/s10683-020-09645-z

Abstract: Can we use the lens of dual-system theories to explain altruistic behavior? In recent years this question has attracted the interest of both economists and psychologists. We contribute to this emerging literature by reporting the results of a meta-study of the literature and a new experiment. Our meta-study is based on 22 experimental studies conducted with more than 12,000 subjects. We show that the overall effect of manipulating cognitive resources to promote the “intuitive” system at the expense of the “deliberative” system is very close to zero. One reason for this null result could be that promoting intuition has heterogeneous effects on altruism across different subgroups of subjects or contexts. Another reason could be that there simply is no real effect and that previously reported single results are false positives. We explore the role of heterogeneity both by performing a mediator analysis of the meta-analytic effect and by conducting a new experiment designed to circumvent the issue of potential heterogeneity in the direction of the effect of promoting intuition. In both cases, we find little evidence that heterogeneity explains the absence of an overall effect of intuition on altruism. Taken together, our results offer little support for dual-system theories of altruistic behavior.

Discussion and conclusions

In this paper, our aim was to probe the validity of a dual-system approach to altruistic behavior, by testing the hypothesis that trade-offs between self-interest and altruism trigger a conflict between our “fast”, intuitive System 1 and our “slower”, more deliberative System 2. We performed a meta-analysis of the existing literature on the relation between altruism and intuition/deliberation and found that the manipulations used in previous experiments to promote the intuitive system at the expense of the deliberative system (using ego depletion tasks, cognitive load, time pressure or priming) have an overall effect on altruism that is very close to, and not significantly different from, zero.

Can this aggregate null result be due to the fact that the relation between altruism and our two systems is genuinely heterogeneous across different subgroups and decision situations, as some researchers have suggested? We find little evidence that this may be the case. We first run a mediator analysis based on the existing literature and consider a number of potential mediators of the relation between intuition and altruism (including mediators previously suggested in the literature, such as gender, the stakes of the experiment, or the frame of the task). We find that none of the mediators included in the analysis play a significant role in explaining the mixed results in existing studies. One possible exception is the frame of the task, for which we find evidence of a mediating effect in some specifications of the analysis, but not in others.

We then designed and ran a new experiment that allowed us to probe the validity of dual-system theories of altruism without being vulnerable to the presence of unobserved and/or unanticipated heterogeneity in the relation between altruism and intuition. We argue that, if trade-offs between altruism and self-interest trigger a conflict between the intuitive and deliberative systems, then being exposed to these trade-offs should be willpower-depleting. We do not find evidence that this is the case. Directionally, the effect is in line with the hypothesis: subjects who were exposed to trade-offs between altruism and self-interest perform worse on a task that requires willpower than subjects who were not exposed to such trade-offs. However, we cannot reject the null that the two groups perform similarly.Footnote 20

Overall, the combination of evidence from the meta-study and the new experiment suggests that choices that involve trade-offs between altruism and self-interest do not trigger any strong conflict between intuition and deliberation. This could be because, in the realm of altruistic behavior, the decision processes governed by the intuitive and deliberative systems may actually both lead to the same outcome for any given individual. That is, the two systems are not actually in conflict when it comes to making these type of decisions, and hence their outcome is the same. Alternatively, the null results reported in the literature and in our new experiment could mean that the lens of dual-system models does not extend to altruistic behavior. In either case, our study offers little support for the notion that, in the domain of altruistic choices, the individual must spend cognitive resources to override the intuitive impulse when the person wants to take a choice favored by the deliberative system.

Animals use many different types of traits to attract mates & outcompete rivals, including colours, songs, & horns, but it remains unclear why, for example, some taxa have songs, others colours, & others horns

Songs versus colours versus horns: what explains the diversity of sexually selected traits? John J. Wiens, E. Tuschhoff. Biological Reviews, February 24 2020. https://doi.org/10.1111/brv.12593

ABSTRACT: Papers on sexual selection often highlight the incredible diversity of sexually selected traits across animals. Yet, few studies have tried to explain why this diversity evolved. Animals use many different types of traits to attract mates and outcompete rivals, including colours, songs, and horns, but it remains unclear why, for example, some taxa have songs, others have colours, and others horns. Here, we first conduct a systematic survey of the basic diversity and distribution of different types of sexually selected signals and weapons across the animal Tree of Life. Based on this survey, we describe seven major patterns in trait diversity and distributions. We then discuss 10 unanswered questions raised by these patterns, and how they might be addressed. One major pattern is that most types of sexually selected signals and weapons are apparently absent from most animal phyla (88%), in contrast to the conventional wisdom that a diversity of sexually selected traits is present across animals. Furthermore, most trait diversity is clustered in Arthropoda and Chordata, but only within certain clades. Within these clades, many different types of traits have evolved, and many types appear to have evolved repeatedly. By contrast, other major arthropod and chordate clades appear to lack all or most trait types, and similar patterns are repeated at smaller phylogenetic scales (e.g. within insects). Although most research on sexual selection focuses on female choice, we find similar numbers of traits (among sampled species) are involved in male contests (44%) and female choice (55%). Overall, these patterns are largely unexplained and unexplored, as are many other fundamental questions about the evolution of these traits. We suggest that understanding the diversity of sexually selected traits may require a shift towards macroevolutionary studies at relatively deep timescales (e.g. tens to hundreds of millions of years ago).

Money: An Integrated Review and Synthesis From a Psychological Perspective

Money: An Integrated Review and Synthesis From a Psychological Perspective. Xijing Wang, Zhansheng Chen, Eva G. Krumhuber. Review of General Psychology, February 23, 2020. https://doi.org/10.1177/1089268020905316

Abstract: Many empirical studies have demonstrated the psychological effects of various aspects of money, including the aspiration for money, mere thoughts about money, possession of money, and placement of people in economic contexts. Although multiple aspects of money and varied methodologies have been focused on and implemented, the underlying mechanisms of the empirical findings from these seemingly isolated areas significantly overlap. In this article, we operationalize money as a broad concept and take a novel approach by providing an integrated review of the literature and identifying five major streams of mechanisms: (a) self-focused behavior; (b) inhibited other-oriented behavior; (c) favoring of a self–other distinction; (d) money’s relationship with self-esteem and self-efficacy; and (e) goal pursuit, objectification, outcome maximization, and unethicality. Moreover, we propose a unified psychological perspective for the future—money as an embodiment of social distinction—which could potentially account for past findings and generate future work.

Keywords: money, psychological effects, integrated review, unified perspective

Laws against wrongdoing may originate in intuitions that are part of universal human nature, according to the adaptationist theory, which proposes that laws can be traced to neurocognitive mechanisms and ancestral selection pressures

The origins of criminal law. Daniel Sznycer & Carlton Patrick. Nature Human Behaviour, February 24 2020. https://www.nature.com/articles/s41562-020-0827-8

Abstract: Laws against wrongdoing may originate in justice intuitions that are part of universal human nature, according to the adaptationist theory of the origins of criminal law. This theory proposes that laws can be traced to neurocognitive mechanisms and ancestral selection pressures. According to this theory, laypeople can intuitively recreate the laws of familiar and unfamiliar cultures, even when they lack the relevant explicit knowledge. Here, to evaluate this prediction, we conduct experiments with Chinese and Sumerian laws that are millennia old; stimuli that preserve in fossil-like form the legal thinking of ancient lawmakers. We show that laypeople’s justice intuitions closely match the logic and content of those archaic laws. We also show covariation across different types of justice intuitions: interpersonal devaluation of offenders, judgements of moral wrongness, mock-legislated punishments and perpetrator shame—suggesting that multiple justice intuitions may be regulated by a common social-evaluative psychology. Although alternative explanations of these findings are possible, we argue that they are consistent with the assumption that the origin of criminal law is a cognitively sophisticated human nature.

Single dose testosterone administration increases men’s facial femininity preference in a Chinese population

Single dose testosterone administration increases men’s facial femininity preference in a Chinese population. Chengyang Han et al. Psychoneuroendocrinology, February 20 2020, 104630. https://doi.org/10.1016/j.psyneuen.2020.104630

Highlights
•    Testosterone administration increases men’s facial femininity preferences.
•    Chinese men preferred femininity over masculinity in women’s faces.
•    Testosterone has a causal effect on men’s facial preferences.

Abstract: Sex hormones are thought to influence human mate preferences. Previous studies have reported mixed results regarding the association between men’s testosterone levels and their mate preferences. The present study investigated the effect of testosterone administration on men’s facial femininity preference. Heterosexual Chinese male participants (n = 140) received a single dose of 150 mg testosterone or placebo gel in a double-blind, placebo-controlled, between-participant design. Results showed that Chinese men demonstrated general preferences for feminized women’s faces, consistent with previous results from the Western population. More importantly, men showed stronger attraction to femininity in women’s faces three hours after testosterone administration than at the beginning of the session. In the placebo group, no significant change in facial femininity preferences was found between time points. These results indicate that exogenous testosterone increases men’s facial femininity preferences in a Chinese population.

Less agreeable, better preserved? Lower Agreeableness is associated with better preservation of limbic area; aging-related hippocampal volume decrease is lower in elders with higher openness

Less agreeable, better preserved? A PET amyloid and MRI study in a community-based cohort. Panteleimon Giannakopoulos et al. Neurobiology of Aging, February 19 2020. https://doi.org/10.1016/j.neurobiolaging.2020.02.004

Highlights
•    Lower Agreeableness is associated with better preservation of limbic areas
•    Aging-related hippocampal volume decrease is lower in elders with higher openness
•    Personality impact on brain volume is independent of amyloid load and APOE genotype

Abstract: The relationship between personality profiles and brain integrity in old age is still matter of debate. We examined the association between Big Five factor and facet scores and MRI brain volume changes upon a 54-month follow-up in 65 elderly controls with three neurocognitive assessments (baseline, 18 and 54 months), structural brain MRI (baseline and 54 months), brain amyloid PET during follow-up, and APOE genotyping. Personality was assessed with the Neuroticism Extraversion Openness Personality Inventory-Revised. Regression models were used to identify predictors of volume loss including time, age, sex, personality, amyloid load, presence of APOE epsilon 4 allele and cognitive evolution. Lower agreeableness factor scores (and four of its facets) were associated with lower volume loss in hippocampus, entorhinal cortex, amygdala, mesial temporal lobe and precuneus bilaterally. Higher openness factor scores (and two of its facets) were also associated with lower volume loss in left hippocampus. Our findings persisted when adjusting for confounders in multivariable models. These data suggest that the combination of low agreeableness and high openness is an independent predictor of better preservation of brain volume in areas vulnerable to neurodegeneration.

White-faced capuchin monkey dyads in Costa Rica practice idiosyncratic interaction sequences that involve an unusual intensity of focus on the partner, behaviours of no immediate utilitarian purpose that sometimes involve "sacred objects"

Capuchin monkey rituals: an interdisciplinary study of form and function. Susan Perry, Marco Smolla. bioRxiv, Feb 24 2020. https://doi.org/10.1101/2020.02.21.958223

Abstract: Many white-faced capuchin monkey dyads in Lomas Barbudal, Costa Rica, practice idiosyncratic interaction sequences that are not part of the species-typical behavioural repertoire. These interactions often include uncomfortable or risky elements. These interactions exhibit the following characteristics commonly featured in definitions of rituals in humans: (1) they involve an unusual intensity of focus on the partner, (2) the behaviours have no immediate utilitarian purpose, (3) they sometimes involve "sacred objects", (4) the distribution of these behaviours suggests that they are invented and spread via social learning, and (5) many behaviours in these rituals are repurposed from other behavioural domains (e.g. extractive foraging). However, in contrast to some definitions of ritual, capuchin rituals are not overly rigid in their form, nor do the sequences have specific opening and closing actions. In our 9,260 hours of observation, ritual performance rate was uncorrelated with amount of time dyads spent in proximity but is (modestly) associated with higher relationship quality and rate of coalition formation across dyads. Our results suggest that capuchin rituals serve a bond-testing rather than a bond-strengthening function. Ritual interactions are exclusively dyadic, and between-dyad consistency in form is low, casting doubt on the alternative hypothesis that they enhance group-wide solidarity.

Democrats overestimate the explicit prejudice of the American electorate, & thus see disadvantaged groups as less electable; Democrats who frequently interacted with Republicans had more accurate estimations of explicit prejudice

Mercier, Brett, Jared Celniker, and Azim Shariff. 2020. “Overestimating Explicit Prejudice Causes Democrats to Believe Disadvantaged Groups Are Less Electable.” PsyArXiv. February 24. doi:10.31234/osf.io/s52qz

Abstract: Three studies show that Democrats overestimate the explicit prejudice of the American electorate, and thus see disadvantaged groups as less electable. Study 1 found that Democrats underestimated the percentage of Americans who say they would vote for presidential candidates from disadvantaged groups. Study 2 replicated this finding and demonstrated that Democrats who perceive high levels of explicit prejudice towards a group also believe presidential candidates from that group would be less electable. Moreover, Democrats who frequently interacted with Republicans had more accurate estimations of explicit prejudice. Study 3 found that correcting misperceptions about explicit prejudice made Democrats believe generic presidential candidates from disadvantaged groups would be more electable. We did not find evidence that correcting misperceptions affected beliefs about the electability of specific candidates in the 2020 Democratic Primary or support for these candidates.

Ability self-estimates (SEs) exhibit strong correlations with personality traits; in most domains, personality explains more variance in SEs than abilities do

Self-estimates of abilities are a better reflection of individuals’ personality traits than of their abilities and are also strong predictors of professional interests. Aljoscha C. Neubauer, Gabriela Hofer. Personality and Individual Differences, February 24 2020, 109850. https://doi.org/10.1016/j.paid.2020.109850

Highlights
• Ability self-estimates (SEs) exhibit strong correlations with personality traits.
• Personality predicts SEs independently of measured abilities and grades.
• In most domains, personality explains more variance in SEs than abilities do.
• Interests are mostly a function of self-estimated and not true abilities.

Abstract: In several meta-analyses, self-estimates of abilities have been shown to correlate surprisingly low with individuals’ real (i.e., psychometrically assessed) abilities. We recently confirmed this in a study where we investigated the accuracy of self- and peer-estimates of six central abilities (verbal, numerical, spatial intelligence, interpersonal and intrapersonal competence, creative/divergent thinking). Here, we describe two studies: In study 1, we first investigated, to which extent self-estimates of adolescents’ central abilities can be predicted from three sources: relevant school grades, the pertinent psychometric ability itself, and personality (big five traits and narcissism). We found that self-estimates are a stronger reflection of the individuals’ personality than their abilities per se. Second, we wanted to assess to what degree (professional) interests, which might guide career decisions in adolescents/young adults, are predicted by self-estimated and psychometrically assessed abilities. We found that professional interests are mostly a function of self-estimates and not of ‘true’ abilities, a finding that we replicated in study 2 with young adults. Given the strong associations between self-estimates and personality and past findings showing that abilities are better predictors of professional success than personality traits are, this might be non-optimal.

Keywords: IntelligenceEmotional intelligenceCreativitySelf-estimatesGradesInterestsAdolescents

Individuals rated their past relationship quality more negatively in retrospect than they saw when in the relation; this bias ma ybe a motivated cognition that helps individuals let go of their ex-partners after a breakup

Ex-appraisal bias: Negative illusions in appraising relationship quality retrospectively. Aidan P. J. Smyth, Johanna Peetz, Adrienne A. Capaldi. Journal of Social and Personal Relationships, February 24, 2020. https://doi.org/10.1177/0265407520907150

Abstract: Cognitive biases are prevalent within the context of romantic relationships. The present research investigated biases about relationships after they have ended. In a longitudinal design (N = 184), individuals reported relationship quality at two time points, as well as rated relationship quality retrospectively. Results supported an ex-appraisal bias: individuals rated their past relationship quality more negatively in retrospect than they had actually reported at the time. This bias was present across participants who stayed together and those who broke up but was three times larger for those whose relationships had ended. This bias may be a motivated cognition that helps individuals let go of their ex-partners after a breakup.

Keywords: Breakup, ex-appraisal bias, ex-partner, motivated cognition, retrospective bias, romantic relationships

Personality, behavioral strengths and difficulties and performance of adolescents with high achievements in science, literature, art and sports

Personality, behavioral strengths and difficulties and performance of adolescents with high achievements in science, literature, art and sports. Kostas A. Papageorgiou et al. Personality and Individual Differences, Volume 160, 1 July 2020, 109917. https://doi.org/10.1016/j.paid.2020.109917

Highlights
•    Personality was more strongly related to behaviour problems than to achievement.
•    Personality may be indirectly linked with achievement via behavior problems.
•    Teacher-awarded grades, but not exam grades, were weakly connected with personality.
•    Teachers gave higher grades to students with ‘desirable’ personality traits.
•    Unlike dark traits, narcissism correlated negatively with internalizing problems.

Abstract: Individual variation in personality is related to differences in behavioral difficulties and achievement in unselected samples, and in samples selected for high achievement in various domains. This is the first study to explore and compare the connections between self-report measures of personality (Big Five and Dark Triad), behavioral strengths and difficulties, and school achievement in four tracks of high-achieving adolescents (N = 1179) selected based on their exceptional performance in: Science, Arts, Sports and Literature. Personality was more strongly related to behavioral strengths and difficulties than to achievement in all tracks. As such, personality traits may be indirectly linked with achievement via behavioral strengths and difficulties. For example, narcissism correlated negatively with behavioral difficulties but did not significantly correlate with achievement. However, achievement was correlated negatively with behavioral difficulties. Network analyses indicated that teacher-awarded grades, but not anonymous exam grades, were weakly connected with personality. Specifically, teachers awarded higher grades to students with more ‘desirable’ personality traits such as high agreeableness. Results also showed track differences in the networks of personality, behavior and achievement. These findings are discussed in the context of personality as a resilience factor against behavioural difficulties and as a contributor to school achievement in gifted adolescents.

Adults spontaneously make moral judgments consistent with the logic of universalization, and children show a comparable pattern of judgment as early as 4 years old

Levine, Sydney, Max Kleiman-Weiner, Laura Schulz, josh tenenbaum, and Fiery A. Cushman. 2020. “Universalization Reasoning Guides Moral Judgment.” PsyArXiv. February 23. osf.io/p7e6h

Abstract: To explain why an action is wrong, we sometimes say: “What if everybody did that?” In other words, even if a single person’s behavior is harmless, that behavior may be wrong if it would be harmful once universalized. We formalize the process of universalization in a computational model, test its quantitative predictions in studies of human moral judgment, and distinguish it from alternative models. We show that adults spontaneously make moral judgments consistent with the logic of universalization, and that children show a comparable pattern of judgment as early as 4 years old. We conclude that alongside other well-characterized mechanisms of moral judgment, such as outcome-based and rule-based thinking, the logic of universalizing holds an important place in our moral minds.

In Spain, the percentage of old drivers (65 an over) has raised from 10.2% in 2007 to 14.3% in 2016; cost of crashes involving 75+ y.o. drivers is 4.3 times higher than accidents involving 65–75 y.o. drivers

Does longevity impact the severity of traffic crashes? A comparative study of young-older and old-older drivers. Mercedes Ayuso, Rodrigo Sánchez, Miguel Santolino. Journal of Safety Research, February 22 2020. https://doi.org/10.1016/j.jsr.2020.02.002

Highlights
• In Spain, the percentage of old drivers (65 an over) has raised from 10.2% in 2007 to 14.3% in 2016.
• Changes in crash severity patterns in the driver’s age of (approximately) 75 years old are statistically significant.
• Male drivers under 75 are more likely to be involved in serious and fatal accidents.
• Gender differences in crash severity among old-older drivers (over 75) are not observed.
• The estimated cost of crashes involving old-older drivers is 4.3 times higher than accidents involving young-older drivers (65–75).
• The expected crash cost can be more than five times higher for old-older drivers than drivers under 65.

Abstract:
Introduction: This article analyzes the effect of driver’s age in crash severity with a particular focus on those over the age of 65. The greater frequency and longevity of older drivers around the world suggests the need to introduce a possible segmentation within this group at risk, thus eliminating the generic interval of 65 and over as applied today in road safety data and in the automobile insurance sector.

Method: We investigate differences in the severity of traffic crashes among two subgroups of older drivers –young-older (65–75) and old-older (75+), and findings are compared with the age interval of drivers under 65. Here, we draw on data for 2016 provided by Spanish Traffic Authority. Parametric and semi-parametric regression models are applied.

Results: We identified the factors related to the crash, vehicle, and driver that have a significant impact on the probability of the crash being slight, serious, or fatal for the different age groups.

Conclusions: We found that crash severity and the expected costs of crashes significantly increase when the driver is over the age of 75.

Practical Applications: Our results have obvious implications for regulators responsible for road safety policies – most specifically as they consider there should be specific driver licensing requirements and driving training for elderly – and for the automobile insurance industry, which to date has not examined the impact that the longevity of drivers is likely to have on their balance sheets.

Keywords: Older driversGroups at riskBodily injuries damagesPolicy implicationsAutomobile insurance

Despite several methods requiring significantly more time facing mortal fear, differences in ability to enact a suicide attempt with a particular method was not associated with fearlessness about death

Fearlessness about death does not differ by suicide attempt method. Brian W. Bauer et al. Journal of Psychiatric Research, February 22 2020. https://doi.org/10.1016/j.jpsychires.2020.02.014

Abstract: Modern theories of suicide, such as the Interpersonal Theory of Suicide, have overcome past conceptual limitations within suicide research by examining factors that help differentiate suicide attempters from those who experience suicidal ideation, but never attempt suicide. One such factor that has been studied extensively is fearlessness about death. Given the varying levels of lethality for different methods used in suicide attempts, an important question is if different levels of fearlessness about death are needed for specific methods. The central aim of this study was to test whether various methods for suicide are associated with different levels of fearlessness about death in a large sample of suicide attempt survivors. Participants were 620 suicide attempt survivors from active military, veteran, and civilian populations. Suicide attempt status was confirmed by two independent raters coding qualitative accounts and participants indicating at least one past attempt with intent to die on other survey items. Results indicated that fearlessness about death does not differ by attempt method and that nearly all methods are statistically equivalent to one another. Despite several methods requiring significantly more time facing mortal fear and severe physical anguish (e.g., cutting, hanging/asphyxiation), as well as certain means being much more lethal (e.g., firearm), differences in ability to enact a suicide attempt with a particular method was not associated with fearlessness about death. This may further indicate the importance of clinicians focusing on practical capability aspects (e.g., means safety, access, comfort with method) with patients at an increased risk for suicide.

Keywords: Capability for suicideSuicide attemptFearlessness about deathEquivalence testing

Pedohebephilia could be considered a form of sexual orientation for age, which includes both sexual and romantic attraction

Sexual Attraction and Falling in Love in Persons with Pedohebephilia. Frederica M. Martijn, Kelly M. Babchishin, Lesleigh E. Pullman & Michael C. Seto. Archives of Sexual Behavior, February 21 2020. https://link.springer.com/article/10.1007/s10508-019-01579-9

Abstract: Few studies of pedophilia or hebephilia have included questions about romantic attraction. We conducted an anonymous online survey of 306 men who self-reported as sexually attracted to children. The majority (72%) of participants reported they had fallen in love with a child in their lifetime. Participants reported greater feelings of attachment to children than feelings of infatuation. Though sexual attraction and falling in love were strongly correlated, they were not synonymous. Participants who reported pedohebephilia (defined in this study as attraction to prepubescent and pubescent children) were more likely to have fallen in love with a child than participants who reported pedohebe-ephebophilia (defined as attraction to prepubescent, pubescent, and post-pubescent minors). Also, participants with an exclusive attraction to children were more likely to have fallen in love with a child than participants who were equally attracted to children and adults. The results of this study were consistent with the suggestion of Seto (2012) that pedohebephilia could be considered a form of sexual orientation for age, which includes both sexual and romantic attraction.

Laboratory: Women avoid competing with men; men seem to anticipate the lower competitiveness of female opponents, as evidenced by their greater tendency to compete against women

Gender and Willingness to Compete for High Stakes. Dennie van Dolder, Martijn J. van den Assem and Thomas Buser. Tinbergen Institute Discussion Paper TI 2020-011/I, Feb 2020. https://papers.tinbergen.nl/20011.pdf

Abstract: We examine gender differences in competitiveness, using a TV game show where the winner of an elimination competition plays a game of chance worth hundreds of thousands of euros. At several stages of the competition, contestants face a choice between continuing to compete and opting out in exchange for a comparatively modest prize. When strategic considerations are absent, we observe the well-known pattern that women are less likely to compete than men, but this difference derives entirely from women avoiding competition against men. When the decision to compete is strategic and contestants should factor in the competitiveness of others, women again avoid competing against men. Men, in turn, seem to anticipate the lower competitiveness of female opponents, as evidenced by their greater tendency to compete against women. Ability differences are unlikely to explain these results. The findings underline the importance of the gender of competitors for the analysis of differences in willingness to compete, and shed new light on the persistent gender gap at the male-dominated higher rungs of the career ladder.

JEL: D91, J16
Keywords: gender differences, competitiveness, willingness to compete, game show

6. Conclusion and discussion

The present paper examined gender differences in willingness to compete for high stakes, using a TV
game show where the winner of an elimination competition plays a game of chance worth hundreds
of thousands of euros. The amounts that are at stake in this real-life setting are much closer to the
sums involved in promotion competitions at the top of the labor market than the financial rewards
that are commonly employed in laboratory experiments.
We focused on two different games. In the first, contestants choose between competing in the next
elimination game and opting out for a prize. This decision resembles the tournament-entry decision
that subjects typically make in lab experiments. In line with the picture that emerges from the
experimental literature, we find that women are twice as likely as men to avoid the competition. The
comparatively high opt-out rate of women, however, derives entirely from situations where they will
face predominantly male opponents. This suggests that women have a particular dislike of competing
against men, rather than a more general dislike of competition. In this non-strategic game, men do not
appear to condition their behavior on the gender of their opponents.
In the second game one question determines the last elimination, unless one of the two remaining
contestants voluntarily accepts an opt-out prize. This head-to-head game is relatively complex,
because the optimal choice depends on the anticipated behavior of the opponent. The results show
that both genders avoid competing against a male opponent in this strategic setting. The same pattern
arises in the strategic game analyzed in the Appendix. This pattern confirms the result for the first
game that women avoid competing against men, and suggests that in strategic interactions men
anticipate a lower willingness to compete among their female opponents. In line with the results for
the first game, there is no evidence of a main effect of gender on competitiveness.
Altogether, the results confirm that gender differences in willingness to compete also occur in
situations where the stakes are very high, but they also indicate that the stereotypical image and
widely-held belief that women are less competitive than men is too simplistic. The findings show the
importance of the gender of competitors and of the presence of strategic interaction: women appear
to dislike competing against men, and men appear to exploit this when there is strategic interaction.
Hitherto, the literature on gender differences in willingness to compete has largely ignored these two
factors. Exceptions are Booth and Nolen (2012) and Geraldes (2018), who similarly find that women
avoid competing against men. Such a dislike is in line with evidence that women perform worse when
they compete against men (Gneezy, Niederle and Rustichini, 2003; Günther et al., 2010; Backus et al.,
2016; de Sousa and Hollard, 2016; Booth, Cardona-Sosa and Nolen, 2018; Booth and Yamamura, 2018).
Strategic interaction is typically ruled out by design in willingness-to-compete experiments.
Research somewhat removed from the willingness-to-compete literature indirectly supports our
conclusion about the importance of opponent gender in strategic interactions. Babcock et al. (2017)
show that women are more likely than men to volunteer for an undesirable task when interacting in
mixed-gender groups, but not when interacting in single-gender groups. Booth and Yamamura (2018)
study Japanese speedboat races and find that men adopt a more aggressive racing style in mixedgender races than in single-gender races, whereas women act less aggressively in mixed-gender races
than in single-gender races. Hernandez-Arenaz and Iriberri (2018) investigate bargaining behavior in a
Spanish TV game show and find that women ask less from men than from women.
Our setting differs in a number of ways from that of a traditional laboratory experiment. In addition to
the markedly higher stakes, the subject pool that we observe is much more diverse, and because of
the presence of a large audience and cameras, our contestants’ decisions are observed by many and
subject to considerable public scrutiny. A benefit of the diverse pool of contestants is that we can also
explore how competitiveness varies with age. We consistently find a u-shaped relation, with people
who are in their forties displaying the lowest opt-out propensity. Mayr et al. (2012) find a similar
relation between age and competitiveness among subjects in an incentivized experiment. Flory et al.
(2018) and Buser, Niederle and Oosterbeek (2020), however, report different age patterns.
A benefit of the public nature of the competition, is that this feature is shared by many consequential
real world competitions. In the political arena and upper echelons of the corporate world, for example,
people face considerable public scrutiny when they compete for top positions. This is another
argument for why our naturally occurring setting is much more similar to such real-world situations
than anonymous, low-stakes laboratory experiments. Because opting out of the competition ends
public observability and choosing to compete extends it, a difference in the attitudes of men and
women towards public observability would obfuscate the relation between gender and
competitiveness. To the best of our knowledge, the only paper that studies the impact of public
observability on competitiveness is Buser, Ranehill and van Veldhuizen (2019). They find suggestive
evidence that public observability increases men’s willingness to compete, but conclude that public
observability does not alter the magnitude of the gender gap in willingness to compete in an
economically or statistically significant way. This possible confound also occurs in many real-life
settings, but cannot explain why women display a dislike of competing against men and why men are
more competitive when they face women in a strategic setting.
Similar to the tasks that are typically used in willingness-to-compete experiments, the questions that
are central in the elimination competition are often numerical or arithmetic in nature. This similarity
facilitates the comparison of our results with those of previous studies. Research on competitiveness
often intentionally uses such tasks because mathematics is a stereotypically male area, which brings
the research closer to competitive situations in male-dominated workplaces or male-connotated areas
such as management (Niederle and Vesterlund, 2011). Although we cannot entirely rule out that our
results are partly driven by a gender difference in the ability to answer the questions, none of the
additional analyses of our data provide evidence that the quiz questions actually favor men. Second,
based on research into math performance and research into recall of factual information, there is little
reason to believe that such a difference holds true for the general population (Herlitz et al., 1997;
Nilsson, 2003; Hyde et al., 2008; Lindberg et al., 2010). Last, even if any gender difference would exist
among the initial pool of contestants, it would be relatively small among those we study because
weaker contestants are less likely to reach the stages of interest.
Of course, contestants may have held non-rational expectations about their own ability and that of
others, possibly inspired by stereotypical beliefs about the performance of men and women on math
questions. Indeed, in experimental work that uses a neutral or stereotypically female type of task,
competitiveness differences between men and women are sometimes, but not always, weak or absent
(Große and Riener, 2010; Shurchkov, 2012; Dreber, von Essen and Ranehill, 2014; Wozniak, Harbaugh
and Mayr, 2014). Stereotype-biased beliefs about performance may explain why women display a
relatively low propensity to compete against men in all the games that we study, and why men display
a relatively high propensity to compete against women when the game is strategic. This explanation,
however, is not supported by the behavior of men in the first game: there is no evidence that men are
especially eager to compete against women. If anything, men are more likely to opt out against women
than against men in this game.
A possible concern about our findings is that their generalizability might be negatively affected by
selection effects. Selection procedures are inevitable in any lab experiment or field setting, and could
potentially bias comparisons of the behavior of men and women (Larkin and Pines, 2003; Reback and
Stowe, 2011; Hogarth, Karelaia and Trujillo, 2012). Unlike contestants in most other game shows,
however, contestants in our elimination competition do not need to self-select into auditions and are
not screened and then selected by producers prior to their participation. All have won their ticket
through the popular Dutch Postcode Lottery. Even for competition-averse individuals, using this ticket
is attractive: in addition to the lucrative possibility of becoming the finalist, contestants can win many
other large prizes. Nevertheless, subjects in our study are not selected perfectly at random: all are
lottery players who were able to attend the recording, and couples might send the best or most
competitive of the two of them. Still, as a group the subjects in our study do resemble a cross-section
of the general population much more closely than subjects in most lab experiments and other field
studies do. More importantly, it is not clear how selection mechanisms could explain that the
competitiveness of men and women depends on the gender of their opponent.
Our study finds that women avoid competition against men, but remains silent on the underlying
causes of this behavior. According to the literature, differences in reluctance to compete can be driven
by differences in risk attitudes, (over)confidence, and intrinsic attitudes towards competition.
However, even in controlled experiments, and even without strategic interaction and consideration of
the role of the gender of opponents, careful disentangling of the possible determinants of
competitiveness has proven to be methodologically challenging (van Veldhuizen, 2018; Gillen,
Snowberg and Yariv, 2019). Our field data is not rich enough for delving into the possible explanations,
but it seems implausible that risk preferences depend on the gender of the opponents. This leaves
opponent-dependent confidence in performance and intrinsic opponent-dependent attitudes towards
competition as the most likely drivers: women could be less confident about their performance in a
competition against men, or have a more deeply rooted, intrinsic aversion to competing against men.
Such a specific response to the opponent’s gender can, in turn, be partly determined by the culture in
which people grow up (Gneezy, Leonard and List, 2009; Andersen et al., 2013; Booth et al., 2019;
Zhang, 2019).
Research into the effect of social class and ethnicity on competitiveness suggest that gender
differences in competitiveness—including those identified in the present study—may derive from a
more general phenomenon, where willingness to compete relates to social power and status. Almås
et al. (2016b) find that gender differences in competitiveness arise between boys and girls from
families with a high socioeconomic status only, and not between those who are from families with a
low socioeconomic status. Siddique and Vlassopoulos (2019) report that people from an ethnic
minority group are more likely to compete when their competitors are all co-ethnic than when their
competitors are predominantly from the majority group.
Regardless of the possible psychological mechanisms, the finding that women avoid competing against
men has the important implication that male dominance in a professional environment becomes selfperpetuating. This is especially the case if there is strategic interaction, where those who compete are
better off when others abstain from competing. In such a setting, women can expect more pushback
from both male and female competitors. At the higher rungs of the career ladder, where
overrepresentation of men and strategic interaction are both ubiquitous, affirmative action may be
necessary to alter the status quo.

Sophie Lewis: We Can't Have a Feminist Future Without Abolishing the Family, which create the infrastructure for capitalism, exploiting people of color and disowning queer children

We Can't Have a Feminist Future Without Abolishing the Family. Marie Solis. Vice, Feb 21 2020. https://www.vice.com/en_us/article/qjdzwb/sophie-lewis-feminist-abolishing-the-family-full-surrogacy-now
The feminist thinker Sophie Lewis has a radical proposal for what comes next.

[Full text, photos, lots of links, at the URI above.]

A little more than two weeks before I planned to meet the feminist theorist Sophie Lewis, her mother died. She had been diagnosed with stage 4 cancer in March, requiring Lewis to travel back and forth between her home in Philadelphia and a hospital in the UK—a journey she technically wasn’t allowed to make due to the pending status of her green card. When her mother passed away in late November, she did so thousands of miles away, while Lewis and her brother sang the Taylor Swift song “Safe and Sound” to her over Skype.

Earlier that month, at a lecture in Lower Manhattan hosted by the arts journal e-flux, Lewis, who is 31, reflected on what some might see as an obvious irony to her crisscrossing the ocean to care for her ailing mother: Verso Books had just published her first book, Full Surrogacy Now, a polemic that calls for abolishing the family.

“2019, in addition to its more general geopolitical ghoulishness, has been a difficult one for this particular family abolitionist,” Lewis told the audience of about two dozen. “It's been surreal because the temporal coincidence of the Full Surrogacy launch with this unprecedented requirement for me—that I be at my closest bio-relative’s bedside—brought the stakes of my subject matter to life with almost unbearable intensity.”

The book, and its core premise, has gained widespread attention, from leftist publications like Jacobin and The Nation all the way to Fox News’s Tucker Carlson, who dedicated a June segment on his prime-time show to tearing it down. Recently, the columnist David Brooks declared in The Atlantic that the “nuclear family was a mistake.” The piece inspired a niche version of a popular Drake meme, with the singer shaking his head in disapproval at Brooks’ column in one frame, and smiling at Full Surrogacy Now in the next. (“I gave up after two minutes admittedly, but let it be known that I (incredulous) started reading it,” Lewis tweeted of the Atlantic piece. “Like....have we reached David Brooks?”)

When Lewis demands “full surrogacy now,” she isn’t talking about commercial surrogacy, or ”Surrogacy™,” as she puts it. Instead, she uses the surrogacy industry to build the argument that all gestation is work because of the immense physical and emotional labor it requires of those who do it. She often refers to pregnancy as an “extreme sport.”

If all forms of pregnancy count as work, we can take a clear-eyed look at our current working conditions: “It is a wonder we let fetuses inside us,” she says at the start of her book, citing the roughly 1,000 people in the United States who still die as a result of pregnancy and childbirth each year—mostly poor women and women of color. “This situation is social, not simply ‘natural.’ Things are like this for political and economic reasons: we made them this way.”

And so we can also make them different, Lewis argues. She imagines a future where the labor of making new human beings is shared among all of us, “mother” no longer being a natural category, but instead something we can choose.

At this point, “surrogacy” becomes somewhat metaphorical: Lewis isn’t asking that we all agree to physically gestate fetuses that aren’t biologically ours. Her radical proposition is that we practice “full surrogacy” by abolishing the family. That means caring for each other not in discrete private units (also known as nuclear households), but rather within larger systems of care that can provide us with the love and support we can’t always get from blood relations—something Lewis knows all too well.

Even those of us who might call our family situations relatively “happy” should sign onto this project of demolishing their essential structure, Lewis says. Nuclear households create the infrastructure for capitalism, passing wealth and property down family trees, concentrating it in the hands of the few at the top of our class hierarchy. Maintaining the traditional family structure over time has also meant exploiting people of color and disowning queer children.

Lewis imagines a future where the labor of making new human beings is shared among all of us, “mother” no longer being a natural category, but instead something we can choose.

Lewis isn’t concerned with incremental changes within our existing systems—Full Surrogacy Now, for example, doesn’t make any concrete policy proposals or spend time worrying over issues like the gender pay gap and paid family leave. She’s concerned with much bolder possibilities: In Lewis's utopian future, the family as we know it no longer exists. Everyone, regardless of gender, is a surrogate; we mother each other.

And so, no, Lewis didn’t find that looking after her sick mother contradicted her stance on the nuclear family. If we had achieved the ends of family abolition already, there would have been a vast network of people to care for her mother in those final months of her life, not just Lewis and her brother.

“Nothing could have better illustrated the impossibility, the unjustness, and the structural scarcity—for all concerned—baked into the heart of the private nuclear household,” she said.

When I visited Lewis in Philadelphia in December, we met at a cafe across the street from her apartment around 1 pm. We’d planned to meet earlier, but that morning Lewis had texted me asking if we could push back our breakfast date a couple of hours—she’d stayed out until 5 am dancing at her partner Vicky Osterweil’s birthday party. She walked into the cafe looking fresh and buoyant, her hair a brilliant shade of orange, which she had recently dyed to match the walls of her mother’s apartment.

Over the loud hum of families eating Sunday brunch, Lewis, told me about her somewhat unlikely path to writing a book on surrogacy and family abolitionist theory. We started at the beginning: Lewis was born in Vienna, Austria, where her parents had been working as journalists, but she spent most of her childhood in Geneva, Switzerland, and parts of France, moving around often for her father’s job, which she said often took precedence over her mother’s job, or her family’s other needs.

This arrangement was an indicator of other, darker family dynamics, according to Lewis. One of her earliest family memories was of an argument she had gotten into with her father when she was just three years old: Lewis and her brother were both singing the Queen of the Night’s part in The Magic Flute, an opera they loved watching as children. Her father scolded them both, telling them that they shouldn’t sing the Queen’s part because the King had banished her, and she’d deserved it. Lewis sobbed. “If you skip forward seven years or so, he’s asking me: Why hasn’t there ever been a female Mozart? Why hasn’t there been a female Shakespeare?” Lewis said.

Years later, her father doubted Lewis when she told him she was raped at 13, writing to her partner in an email that rape is “good for the feminist CV.”

She left the house the first chance she got.

Lewis studied English literature at Oxford as an undergraduate, and then received a master’s in the university’s environmental policy program. To her chagrin, what had historically been a rather radical program, led by a Marxist professor, had become one run by an employee of the World Bank; a representative from the oil and gas conglomerate BP delivered a lecture on the first day of classes. When Lewis told the professor she’d been under the impression that the program would be about challenging the corporate interests BP represented, Lewis said the professor told her: “You can’t just change the world.”

Lewis completed the master’s, but took her utopian visions elsewhere. She organized a university reading group dedicated to Donna Haraway’s A Cyborg Manifesto, a complicated essay that imagines a feminist future inhabited by hybrid creatures engaged in political struggle against the racism, misogyny, and colonialism that formed them. Lewis had first discovered the text when she was just 16, using dial-up internet.

“I didn’t understand shit obviously,” she said over breakfast. “But there’s a soul in her writing that I found very exciting, and I felt a queer kinship with it. It was very comforting.”

Lewis went on to study human geography—a field that examines how humans interact with their environment—and write a thesis on gestational labor, all the while turning over ideas in her head about labor, gender, and nature and how they intersect.

In Lewis's utopian future, the family as we know it no longer exists. Everyone, regardless of gender, is a surrogate; we mother each other.

Much of the writing Lewis did during and immediately after her schooling foretells Full Surrogacy Now. But she also applied her critical feminist eye to film and television, writing about Nymphomaniac, Phantom Thread, The Handmaid’s Tale Hulu adaption, and a British reality dating show called First Dates. It was this last piece of criticism that caught the attention of Verso editor Rosie Warren.

“Review” isn’t quite the right word for what Lewis does in these essays. She’s not evaluating the artistic success of these works so much as she is reading them closely to understand how we are living in the world as it is, and how we might go about making it otherwise. Phantom Thread, for example, isn’t a wry love story, but proof that romance is ”a series of atrocities people perpetrate on one another in the name of love and art, for the sake of class power.” And The Handmaid’s Tale—a favorite subject of criticism for Lewis—is hardly a feminist dystopia for its cosplaying fans. Rather it is a feminist utopia, portraying a fantasy of solidarity where all women experience exactly the same form of oppression, regardless of other identity categories like race or class.

Watching First Dates, it occurred to Lewis that heterosexual dating in real life very much resembled the staged, stylized version of it that contestants participate in on the show: “‘Dating,’ as it is currently known and practised, casts ordinary people as perfectible investment opportunities in competition with each other across myriad platforms,” like OkCupid and Tinder, she wrote.

“Verso read the essay and the editor was like, ‘The incredible thing about your writing is that it’s like you’re an alien who has come down to tell us the bad news about heterosexual culture,’” Lewis recalled. “And that’s why they gave me the book.”

Warren laughed when I recited this over the phone. Lewis’s approach to culture “allows you to see things as they are,” she said. “It’s such a wonderful feeling to have someone point out things you don’t even realize you’ve accepted as ‘normal.’”

Lewis appears to be at her most excited when she’s turning some cultural artifact inside out. Between bites of mushroom pizza one evening, she told me animatedly that she and Osterweil had figured out the secret to understanding Gilmore Girls, which they had both recently watched together for the first time. The show, a family drama from the aughts, casts men as marginal characters while the women drive the action, she explained.

“All of the women are men and all of the men are women,” Osterweil added.

When Full Surrogacy Now came out in May, conservatives were aghast. Shortly after its release, Fox News host Tucker Carlson invited Lewis onto his show; when she declined, Carlson moved forward with the segment anyway, airing a YouTube clip of Lewis calling abortion “a form of killing” (a pro-abortion rights statement she stands by). What followed was a torrent of internet abuse, largely from right-wing viewers who saw Lewis as confirmation of all the insidious things they suspected feminism of to begin with: She was “Satan” or “worse than Satan” or “feminism’s true agenda, unmasked!” as Lewis later recalled.

But Lewis’s proposal for dismantling the nuclear family was met with befuddlement from left-leaning outlets too. In a review for The New Yorker, contributor Jessica Weisberg—though otherwise sympathetic to Lewis’s position—argues that Full Surrogacy Now failed to account for that “mysterious variety of love” only biological motherhood can offer. Even at Jacobin, a socialist magazine, writer Nivedita Majumdar declared that the “real path to liberation isn’t the call to ‘abolish the family,’” condemning Lewis’s “dogmatic hostility to the parent-child relation.”

Lewis has found that when she talks about family abolition people respond as though she’s “not even speaking English anymore … like [I’m] not even making syntactical sense,” she said at the e-flux lecture. “Real brain explosion emoji to the max.”

Abolishing the family may not have ever been a mainstream proposition, but for a stretch of time in the 1960s and 70s it was a fairly well-known one. Arguments for family abolition date back to Marx and Engels (and indeed, even further, to Plato), but the radical feminist Shulamith Firestone is credited with popularizing the concept on the modern-day left. In her foundational 1970 manifesto The Dialectic of Sex, she identifies the biological family as the basis for women’s oppression because it establishes women as an underclass by forcing them to bear the brunt of gestational labor.

To be a radical feminist during these years would have meant being familiar with this text and its central demand, which appeared in leftist pamphlets and literature. Yet just a decade later, any advocacy for family abolition had all but disappeared from feminist discourse. Instead, the movement chose to embrace family values, preferring to fight for the reform—rather than the annihilation—of the nuclear family structure.

In the late 70s and 80s, liberal groups and individual feminist leaders argued that family was the new frontier in women’s struggle for equality, given the gains women had recently made in the workforce. “Now that women are beginning to have an active voice in the economy and politics, the nation’s agenda may begin truly to include the family,” said Betty Friedan, the author of The Feminine Mystique, during a keynote address for the 1979 National Assembly on the Future of the Family, which was hosted by the National Organization for Women.

The family, Friedan said, was no longer “enemy territory” for feminists.

When Lewis was writing Full Surrogacy Now, she didn’t give much thought to how her renewed calls for family abolition might be received in 2019. “I think some people take my book as a really intentional, purposeful attempt at pissing everybody off,” she told me with a laugh. “But I don’t feel like I’m strategic; I don’t think my skill is seeing what everyone else is saying and making a calculated intervention.”

Nonetheless, Lewis has chosen a good time to intervene. Over the last decade, feminism has been seemingly emptied of any remaining, actual politics in order for it to be subsumed by brands marketing empowerment. In a post- Lean In climate, still very much dominated by “girlbosses” and “She-E-Os,” mainstream feminism can appear as though it has been completely divorced from its radical roots. Contemporary debates around gender roles, women’s labor, and sexual politics often seem to circle the same arguments feminist theorists had decades ago, but rarely acknowledge that this is the case. (Her next project is tackling some of these contemporary feminist archetypes in a book she's working on now, tentatively titled Feminism of Fools.)

Lewis’s call to abolish the family is also a call to re-energize and repoliticize feminism.

It would be wrong to credit Lewis with rediscovering figures like Firestone. But while these second-wave thinkers have not by any means been forgotten, their early work is more often cited than it is actively engaged with.

“At this point, the radical interventions of these feminist scholars and thinkers happened 30 to 40 years ago,” said Natasha Lennard, who is the author of Being Numerous: Essays on Non-Fascist Life, as well as a close friend of Lewis’s. “There’s been this static and hagiographic upholding of these ideas, but not a lot of pushing them forward, at least not in the public intellectual sphere.”

This kind of reverence is anathema to Lewis. When I asked her what contemporary feminists she admired, she named the queer feminist theorist Sara Ahmed, anti-work feminist Kathi Weeks, and the founding members of the Wages for Housework movement as a few examples, but said it’s “a mistake” to have feminist heroes. “You make them and in doing so you’re platforming someone who then is kind of cursed by that,” Lewis said. “They no longer keep learning and growing to the same degree,” potentially hampering new feminist thinking.

Haraway is an exception. Forgetting herself, Lewis will sometimes refer to Haraway as her “idol.”

Lewis’s call to abolish the family is also a call to re-energize and repoliticize feminism.

Even so, Haraway doesn’t get a free pass. Though Lewis builds on the theory found in Cyborg Manifesto and other early Haraway texts, she has critiqued some of the scholar’s more recent argumentation. In 2017, Lewis penned an essay for Viewpoint Magazine arguing that Haraway appeared to betray her own principles in her latest book, Staying With the Trouble. In Cyborg Manifesto, Haraway envisions a utopian post-gender future created by every member of the human species; but in Staying With the Trouble, Haraway calls for a dramatic reduction of the population in order to reduce humanity’s effects on the climate—a cynical turn toward misanthropy, Lewis wrote.

To Lewis’s surprise, she received an email from Haraway herself not long after the piece went up, inviting her into conversation with several other big-name feminists who were cc’ed. Haraway told Lewis that she had no choice but to “contend” with what Lewis had written: a well-argued piece of criticism. (Haraway told me she wasn’t available for interview due to travel.)

Lewis is bashful about this, but Haraway has made it clear that she sees Lewis as continuing the legacy of her work, even as she challenges it. Much of Lewis’s writing is fundamentally Harawayan in the sense that while at times very dense, it is filled with imagination and metaphor.

“Surrogates to the front!” Lewis exclaims toward the end of her book. “By surrogates I mean those comradely gestators, midwives, and other sundry interveners in the more slippery moments of social reproduction: repairing boats; swimming across borders; blockading lake-threatening pipelines; carrying; miscarrying.”

Afew hours after our breakfast, Lewis invited me to see Queen & Slim with her, Osterweil, and their friend Zach at a theater near the University of Pennsylvania's campus. The film—a drama about a young Black couple on the run after fatally shooting a police officer in self-defense—is not, on its face, about the nuclear family. But after spending just one afternoon with Lewis, I couldn’t help but think of it that way.

Slim is preoccupied by his “legacy,” which he initially sees as something that can exist only through a biological lineage. But at the end of the film, having made the choice to abandon his family to start a new life with Queen, he tells her that she’s his legacy.

Lewis said this happens all the time, this experience of watching something and noticing family abolitionist subtext. It’s probably even happened watching “some superhero movie,” she joked.

“Vicky always digs me in the ribs when we’re watching something that has to do with non-nuclear kinship,” Lewis told me the next day at a ramen restaurant near the office of her therapist, whom she had met with before lunch. “I already know when she’s going to do it. She’s like, ‘Uh?! Uh?!’”

Another place Lewis has found family abolitionist themes is in Ari Aster’s horror films, Hereditary and Midsommar, which she wrote about in August for Commune. The essay is Lewis at her best, weaving together the sharp analysis that caught Verso's eye with her idiosyncratic humor and wit. But it is also a somber look at the nuclear household of her childhood, of which we only get a glimpse in Full Surrogacy Now: Though Lewis may have come to her theories about family abolition and surrogacy intellectually, her own family upbringing has played a role that is difficult to ignore.

In the piece, Lewis tells us that her father taught her and her brother to treat their mother with contempt. When her parents separated, they literally divided the house in half, sealing off doorways and even creating a second kitchen, sectioned off from the original by an improvised partition.

“In other words, I know the family not to be a benign ‘default' situation,’” Lewis writes. “I’ve always known.”

In the wake of her mother’s death, she’d been contending with these family tensions once again. Lewis’s dad was blaming her for one of her mother’s long-ago suicide attempts, and sending nasty messages to her and her brother on Facebook and through email.

But even absent her father’s interventions, growing up, Lewis’s relationship with her mother wasn’t of the “mysterious variety of love” sort. This made grieving her death difficult, especially when so many people seemed to consider the loss of one’s mother—one’s “closest bio-relative,” as Lewis had put it in her November lecture—to be the greatest loss one can suffer.

“People have been saying to me, ‘Love yourself in the days ahead like she loved you,’” Lewis said. “And I’m like, ‘Oh my god, that’s a terrible idea!’ I need to do a lot better than that and so do all my friends.”

On the last day we spent together, I visited Lewis at her home. Originally, she was going to take me on a short walking tour of her neighborhood, but it was raining and gloomy outside, so we settled into two armchairs in her living room. She made us green tea, pouring mine into a mug that read “I’ve got 99 problems and white heteronormative patriarchy is basically all of them.” To my delight, her cat, a small tabby named Robespierre—after the French revolutionary—jumped onto my lap.

Lewis described her slice of West Philadelphia as a “village”: It includes Gold Standard, the quaint cafe where we first met, a tattoo parlor, a “social-justicey” yoga studio, a community garden, a “punk” hair salon, and an antique shop where Lewis and Osterweil had a $50 voucher, a wedding gift they still hadn’t used more than a year after they married. Days earlier, hunting for a seat at Gold Standard, we spotted someone leaving who turned out to be a friend of Lewis: They told her that they planned to sign up for the Brooklyn Institute class she is teaching this month at the anarchist bookstore Wooden Shoe Books.

Shortly after we found seats facing the window, we waved to Osterweil, who was smoking a cigarette as she crossed the street.

"I know the family not to be a benign ‘default' situation. I’ve always known.”

Sitting beside me in her apartment, Lewis showed me a scrapbook her mother had made, filled with photos of her playing with buckets of water and grinning at the beach—a reminder of her own arguments in Full Surrogacy Now that we should, figuratively, return to the “wateriness” in which we were gestated. It is at this time, Lewis says, when we are suspended in amniotic fluid, that the boundaries of our physical selves are in flux. To acknowledge that this is also true in life—that we are all inextricably connected to each other, biological family or not—would create the conditions for “radical kinship.”

She also showed me one of the zines she and Osterweil gave to guests at their wedding, which include speeches from friends and promises to each other. The latter could not properly be called “vows,” because they are in fact disavowals: of the institution of marriage, the biological family, and the dysfunction that both can breed. (They had a more traditional ceremony in Boston, at the request of Osterweil’s mother.)

To spend any amount of time with Lewis is to feel that the world she imagines is nearby. Whether we realize it or not, many of us are already familiar with her arguments for abolishing the family. When we talk about the prevalence of domestic violence and child abuse—when some of us find ourselves inside family units that perpetrate these crimes—we acknowledge that, in horror movie parlance, the violence is coming from inside the family.

We may not call it “family abolition” or “full surrogacy,” but many people have begun to erect the caregiving communes Lewis wants to see realized. Queer people build “chosen families,” as do other marginalized groups who depend on each other for their survival. And even within traditional nuclear households, parents might find themselves saying that it “takes a village” to raise children—an acknowledgement that it’s not a job one can do on their own.

In many ways, Lewis shows us, the family has already been abolished. At the same time, the “open-source, fully collaborative gestation” she imagines remains on a distant horizon. Riffing on a famous quote from the philosopher Fredric Jameson, Lewis considers that “if it is easier to imagine the end of the world than the end of capitalism, it is perhaps easier still to imagine the end of capitalism than the end of the family.”

Nonetheless, Lewis sees glimmers of this future everywhere. When she is surrounded by her partner and her friends, she sees that she is “mothered by many.” They are not her biological relatives, but they are each other’s kin in an even truer sense: They have chosen to care for each other without the dictates of the nuclear family structure. In Lewis’ feminist utopia, family has not vanished; it has become more wild, more abundant, and less constrained.

Just a few days after her mother died, Lewis confused a woman crossing the street for her. “It provoked, in the moment, a torrent of intense tears,” Lewis wrote on Twitter. “But now I’m thinking about it and realizing she hasn’t just evaporated. She’ll always be around even after she stops haunting (e.g.) pedestrian crossings in Philadelphia.”

Mothers, of course, are everywhere.

Shorter and longer durations of sleep are associated with an increased twelve-month prevalence of psychiatric and substance use disorders

Shorter and longer durations of sleep are associated with an increased twelve-month prevalence of psychiatric and substance use disorders: Findings from a nationally representative survey of US adults (NESARC-III). Pierre A. Geoffroy et al. Journal of Psychiatric Research, February 21 2020. https://doi.org/10.1016/j.jpsychires.2020.02.018

Highlights
• This study present nationally representative data on the prevalence of mental disorders stratified by duration of sleep.
• A U-shaped association was observed between sleep duration and all psychiatric and substance use disorders.
• Highest risks, exceeding a 3-fold increase for some mental disorders, were observed for short sleepers, especially for the <5 h/night group compared with the 7 h/night reference group.
• These results suggest that adequate sleep duration may have general clinical benefits, calling for actions for primary prevention in public health settings.

Abstract: The lack of comprehensive data on the association between psychiatric and substance use disorders and habitual sleep duration represents a major health information gap. This study examines the 12-month prevalence of mental disorders stratified by duration of sleep. Data were drawn from face-to-face interviews conducted in the National Epidemiologic Survey on Alcohol and Related Conditions III, a nationally representative survey of US adults (N = 36,309). There were 1893 (5.26%) participants who reported <5h of sleep/night; 2434(6.76%) 5 h/night; 7621(21.17%) 6 h/night; 9620(26.72%) 7 h/night; 11,186(31.07%) 8 h/night, and 3245(9.01%) ≥9 h/night. A U-shaped association was observed between sleep duration and all mental disorders. The prevalence of mental disorders was 55% for individuals with <5 h/night and 47.81% for ≥9 h/night, versus 28.24% for the 7 h/night (aOR = 1.90 and 1.39 respectively). The greatest odds ratios were for the <5 h/night group, with an increased risk above 3-fold for panic disorder (PD), post-traumatic stress disorder (PTSD), psychotic disorder, and suicide attempt; between 2 and 3 fold for major depressive disorder (MDD), bipolar disorder (BD), and generalized anxiety disorder (GAD); and between 1 and 2 fold for tobacco and drug use disorders, specific and social phobias. The ≥9 h/night group had an increased risk above 1 to 2-fold regarding tobacco and drug use disorders, MDD, BD, PD, social phobia, GAD, PTSD, psychotic disorder, and suicide attempt. U-shaped associations exist between sleep duration and mental disorders, calling for respect to recommendations for adequate sleep duration in routine clinical care as well as to actions for primary prevention in public health settings.

Keywords: SleepCircadian rhythmsPsychiatric disordersPsychiatryAddictions

Weaker copyrights encouraged the creation of follow-on science by a reduction in access costs, allowing scientists at less affluent institutions to use existing knowledge in new follow-on research

Effects of Copyrights on Science: Evidence from the WWII Book Republication Program. Barbara Biasi and Petra Moser. Feb 2020. https://www.dropbox.com/s/3go6y47fplwt6nf/BRP.pdf

Abstract: Copyrights, which establish intellectual property in music, science,and other creative goods, are intended to encourage creativity. Yet, copyrights also raise the cost of accessing existing work - potentially discouraging future innovation.This paper uses an exogenous shift towards weak copyrights(and low access costs) during WWII to examine the potentially adverse effects of copyrights on science. Using two alternative identification strategies, we show that weaker copyrights encouraged the creation of follow-on science, measured by citations.This change is driven by a reduction in access costs, allowing scientists at less affluent institutions to use existing knowledge in new follow-on research.

Previously: Effects of Copyrights on Science - Evidence from the US Book Republication Program
Barbara Biasi, Petra Moser. NBER Working Paper No. 24255, January 2018. https://www.nber.org/papers/w24255

Abstract: Copyrights for books, news, and other types of media are a critical mechanism to encourage creativity and innovation. Yet economic analyses continue to be rare, partly due to a lack of experimental variation in modern copyright laws. This paper exploits a change in copyright laws as a result of World War II to examine the effects of copyrights on science. In 1943, the US Book Republication Program (BRP) granted US publishers temporary licenses to republish the exact content of German-owned science books. Using new data on citations, we find that this program triggered a large increase in citations to German-owned science books. This increase was driven by a significant reduction in access costs: Each 10 percent decline in the price of BRP book was associated with a 43 percent increase in citations. To investigate the mechanism by which lower book prices influence science, we collect data on library holdings across the United States. We find that lower prices helped to distribute BRP books across US libraries, including less affluent institutions. Analyses of the locations of citing authors further indicate that citations increased most for locations that gained access to BRP books. Results are confirmed by two alternative measures of scientific output: new PhDs and US patents that use knowledge in BRP books.

Shifting the distribution of daily energy intake towards the breakfast meal may be a potential strategy to reduce overall energy intake and improve dietary intakes

Breakfast size is associated with daily energy intake and diet quality. Wenjie Wang et al. Nutrition, February 17 2020, 110764. https://doi.org/10.1016/j.nut.2020.110764

Highlights
• Consuming more energy at breakfast relative to daily energy intake was associated with better dietary profiles and lower daily energy intake in a large nutrition survey
• Those consuming more than 25.5% of energy at breakfast had higher diet quality scores but similar daily energy intakes than breakfast skippers
• Shifting the distribution of daily energy intake towards the breakfast meal may be a potential strategy to improve dietary intakes and reduce overall energy intake

Abstract
Objective  The aim of this study was to investigate the role of breakfast consumption and breakfast size on daily energy, nutrient intakes and diet quality.

Methods  One-day 24-hour recall data from 2011-12 National Nutrition and Physical Activity Survey (n=9,341, adults ≥ 19 years) was analysed, where respondents were classified into breakfast consumers or skippers. Breakfast consumers were further classified into quartile of breakfast size (energy intake (EI) from breakfast x 100% / daily EI). Diet quality was assessed using the Healthy Eating Index for Australian Adults (HEIFA-2013). General linear modelling was undertaken to compare groups, adjusting for potential confounders.

Results  Overall, 85.9% of adults consumed breakfast, contributing a mean of 19.9 ± SD10.9% of daily EI for consumers. Among breakfast consumers, obtaining a higher proportion of daily EI from breakfast was associated with lower daily intakes of energy, added sugars, saturated fat and alcohol (%E) and higher intakes of dietary fibre (%E) and most micronutrients (per 1,000 kJ) and better HEIFA-2013 scores (Ptrend<0.0001). Additionally, those in the highest quartile of breakfast size (>25.5% EI) had higher diet quality scores (P <0.001) but similar daily EI (P =0.751) compared with breakfast skippers.

Conclusions  These findings indicate that obtaining a higher proportion of daily EI from breakfast may result in more favourable dietary profiles and lower daily EI. Further research is needed to confirm this.

Keywords: BreakfastMeal sizeEnergy intakeDiet qualityAdultsNutrition survey

Quiet rooms have a larger impact on patient satisfaction than medical quality; communication with nurses affects satisfaction far more than the hospital-level risk of dying, medical excellence or patient safety

Patients as Consumers in the Market for Medicine: The Halo Effect of Hospitality. Cristobal Young, Xinxiang Chen. Social Forces, soaa007, February 13 2020, https://doi.org/10.1093/sf/soaa007

Abstract: Consumer-driven health care is often heralded as a new quality paradigm in medicine. However, patients-as-consumers face difficulties in judging the quality of their medical treatment. With a sample of 3,000 U.S. hospitals, we find that neither medical quality nor patient survival rates have much impact on patient satisfaction with their hospital. In contrast, patients are very sensitive to the “room and board” aspects of care that are highly visible. Quiet rooms have a larger impact on patient satisfaction than medical quality, and communication with nurses affects satisfaction far more than the hospital-level risk of dying. Hospitality experiences create a halo effect of patient goodwill, while medical excellence and patient safety do not. Moreover, when hospitals face greater competition from other hospitals, patient satisfaction is higher but medical quality is lower. Consumer-driven health care creates pressures for hospitals to be more like hotels. These findings lend broader insight into unintended consequences of marketization.

For many traits, males show greater variability than females; largest-ever mega-analysis of brain structure (international data spanning nine decades of life) shows greater male variability

Greater male than female variability in regional brain structure across the lifespan. Lara M Wierenga et al. bioRxiv, Feb 17 2020. https://doi.org/10.1101/2020.02.17.952010

Abstract: For many traits, males show greater variability than females, with possible implications for understanding sex differences in health and disease. Here, the ENIGMA (Enhancing Neuro Imaging Genetics through Meta-Analysis) Consortium presents the largest-ever mega-analysis of sex differences in variability of brain structure, based on international data spanning nine decades of life. Subcortical volumes, cortical surface area and cortical thickness were assessed in MRI data of 16,683 healthy individuals 1-90 years old (47% females). We observed patterns of greater male than female between-subject variance for all brain measures. This pattern was stable across the lifespan for 50% of the subcortical structures, 70% of the regional area measures, and nearly all regions for thickness. Our findings that these sex differences are present in childhood implicate early life genetic or gene-environment interaction mechanisms. The findings highlight the importance of individual differences within the sexes, that may underpin sex-specific vulnerability to disorders.

Truth tellers reported more verifiable digital details & sources than liars; also provided more unverifiable detail than liars, which was not predicted & goes against the findings in previous studies

Fading lies: applying the verifiability approach after a period of delay. Louise Marie Jupe,Aldert Vrij,Sharon Leal & Galit Nahari. Psychology, Crime & Law, Sep 25 2019. https://doi.org/10.1080/1068316X.2019.1669594

ABSTRACT: We tested the utility of applying the Verifiability Approach (VA) to witness statements after a period of delay. The delay factor is important to consider because interviewees are often not interviewed directly after witnessing an event. A total of 64 liars partook in a mock crime and then lied about it during an interview, seven days later. Truth tellers (n = 78) partook in activities of their own choosing and told the truth about it during their interview, seven days later. All participants were split into three groups, which provided three different verbal instructions relating to the interviewer’s aim to assess the statements for the inclusion of verifiable information: no information protocol (IP) (n = 43), the standard-IP (n = 46) and an enhanced-IP (n = 53). In addition to the standard VA approach of analysing verifiable details, we further examined verifiable witness information and verifiable digital information and made a distinction between verifiable details and verifiable sources. We found that truth tellers reported more verifiable digital details and sources than liars.

KEYWORDS: Deception, verifiability approach, investigative interviews, delay

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We also found that truth tellers provided more unverifiable detail than liars, which was not predicted and goes against the findings in previous studies. We are unable to explain these different findings in our experiment compared to previous work. It could be related to the delay, but to test this an immediate condition needs to be included in the design. One of our initial aims was to see if the VA was still applicable in delay conditions. We did not include an immediate condition as we did not expect significant differences between the immediate and delay conditions. With hindsight, an immediate condition should have been included.

China & South Korea: Drivers had a greater intention to bully automated vehicles than to bully humans; Chinese (vs Korean), male (vs female), & younger (vs older) had a greater intention to drive aggressively

Ready to bully automated vehicles on public roads? Peng Liu, Yong Du, Lin Wang, Da Young Ju. Accident Analysis & Prevention, Volume 137, March 2020, 105457. https://doi.org/10.1016/j.aap.2020.105457

Highlights
• We designed an eleven-item bullying intention questionnaire.
• Participants in China and South Korea had a greater intention to bully AVs than to bully other human drivers.
• Chinese (vs. Korean) participants reported a greater intention to drive aggressively.
• Male (vs. female) participants reported a greater intention to drive aggressively.
• Younger (vs. older) participants reported a greater intention to drive aggressively.

Abstract: Automated vehicles (AVs), the wide adoption of which is expected to improve traffic safety significantly, are penetrating our roads. The AVs that are testing on public roads have been bullied by human road users. We are not sure whether the bullying incidents are isolated or will be common in the future. In a cross-national survey (N = 998 drivers in China and South Korea), we developed an eleven-item bullying intention questionnaire. We assumed and confirmed that, overall, participants had a greater intention to bully machine drivers than to bully other human drivers. Compared to the Korean participants, the Chinese participants reported a greater intention to drive aggressively. The correlations of their intention to bully AVs with their attitude toward AVs and with risk-benefit perception of AVs were weak. Male participants (vs. female participants) and younger participants (vs. older participants) reported a greater intention to drive aggressively. Drivers' aggressive behaviors toward AVs might be common in the future, which might increase traffic risk and hinder the implementation of this technology.

Keywords: automated vehiclesintention to bullymixed traffic flowbullying intention questionnaireaggressive driving

The unique contribution of blushing to the development of social anxiety disorder symptoms: results from a longitudinal study

The unique contribution of blushing to the development of social anxiety disorder symptoms: results from a longitudinal study. Milica Nikolić  Mirjana Majdandžić  Cristina Colonnesi  Wieke de Vente  Eline Möller  Susan Bögels. Journal of Child Psychology and Psychiatry, February 20 2020 https://doi.org/10.1111/jcpp.13221

Abstract
Background  Self‐conscious emotional reactivity and its physiological marker – blushing has been proposed to be an etiological mechanism of social anxiety disorder (SAD), but so far, untested in longitudinal designs. This study tested, for the first time, whether self‐conscious emotional reactivity (indexed as physiological blushing) contributes to the development of SAD symptoms over and above social behavioral inhibition (BI), which has been identified as the strongest predictor of SAD development in early childhood.

Methods  One hundred fifteen children (45% boys) and their mothers and fathers participated at ages 2.5, 4.5, and 7.5 years. Social BI was observed at all time points in a stranger approach task, and physiological blushing (blood volume, blood pulse amplitude, and temperature increases) was measured during a public performance (singing) and watching back the performance at ages 4.5 and 7.5. Child early social anxiety was reported by both parents at 4.5 years, and SAD symptoms were diagnosed by clinicians and reported by both parents at 7.5 years.

Results  Higher social BI at 2.5 and 4.5 years predicted greater social anxiety at 4.5 years, which, in turn, predicted SAD symptoms at 7.5 years. Blushing (temperature increase) at 4.5 years predicted SAD symptoms at 7.5 years over and above the influence of social BI and early social anxiety.

Conclusions  That blushing uniquely contributes to the development of SAD symptoms over and above social BI suggests two pathways to childhood SAD: one that entails early high social BI and an early onset of social anxiety symptoms, and the other that consists of heightened self‐conscious emotional reactivity (i.e. blushing) in early childhood.

Large beauty premium: Attractiveness & trustworthiness perception increased with makeup wearing; male trustors transferred more money to women with makeup; effect is larger for less attractive females

Is the beauty premium accessible to all? An experimental analysis. Angela Cristiane Santos Póvoa et al. Journal of Economic Psychology, February 21 2020, 102252. https://doi.org/10.1016/j.joep.2020.102252

Highlights
• There is a large beauty premium caused by makeup wearing.
• Both attractiveness and trustworthiness perception increased with makeup wearing.
• Makeup wearing increased transfers in the trust game.
• Male trustors transferred more money to women with makeup than female trustors did.
• The makeup effect is larger in magnitude for less attractive female trustees.

Abstract: We conducted a trust game experiment to investigate whether women are trusted more when they wear makeup than when they do not. Facial attractiveness, which was manipulated through the application of makeup by a professional makeup artist, was measured before and after makeovers. Trustors were shown a photograph of their female counterparts before they made decisions about money transfers to trustees. The results showed that wearing makeup increased perceived attractiveness, which in turn led trustors to make larger transfers to female trustees during the trust game. Additionally, we discovered a pure makeup premium that was mediated by gender. Specifically, female trustees with makeup received larger transfers than female trustees without makeup when the trustors were men, even after controlling for female trustees’ levels of attractiveness.

Keywords: trusttrust gamebeauty premiummakeupgender
Jel Code: C71 D003 C91

Older adults more strongly endorsed a nonlimited account of energy, which perceived as more available for social activities; also saw higher negative cross-domain energy spillover after physical exertion

Cardini, B. B., & Freund, A. M. (2020). More or less energy with age? A motivational life-span perspective on subjective energy, exhaustion, and opportunity costs. Psychology and Aging, Feb 2020. https://doi.org/10.1037/pag0000445

Abstract: Two studies investigated subjective conceptualizations of energy for goal pursuit across adulthood. Study 1 (N = 276, 20–92 years of age) explored age-related differences in the (a) endorsement of a limited versus nonlimited account of energy for goal pursuit, (b) amount of energy available for physically, mentally, socially, and emotionally demanding activities, and (c) extent to which spending energy on a demanding activity inhibits or facilitates energy expenditure for subsequent activities, both within and across functional domains. Study 2 (N = 147, 18–86 years of age) experimentally induced energy loss through a 20-min physical exercise and examined age-related differences in the increase of subjective exhaustion and opportunity costs as a motivational cue for goal disengagement. With increasing age, adults more strongly endorsed a nonlimited account of energy and perceived having more energy available for personally relevant social activities. However, older adults also reported higher negative cross-domain energy spillover after physical exertion. Multilevel growth curve models further revealed that, compared with younger adults, older adults reported a steeper initial increase in exhaustion and opportunity costs during physical exercise, but converged with the younger age groups again at the close of the exercise session. The discussion centers around the importance of selectivity in older adulthood and motivational accounts of effort and exhaustion.

Athletic scholarships are negatively associated with intrinsic motivation for sports, even decades later: Evidence for long-term undermining

Moller, A. C., & Sheldon, K. M. (2020). Athletic scholarships are negatively associated with intrinsic motivation for sports, even decades later: Evidence for long-term undermining. Motivation Science, 6(1), 43–48, Feb 2020. https://doi.org/10.1037/mot0000133

Abstract: In the United States, many colleges offer some student athletes scholarships contingent on maintaining high-level performance at a particular sport. Consistent with the well-supported “undermining effect,” studies have demonstrated that such scholarships can reduce athletes’ intrinsic motivation for their sport during their college playing career. The present study examines what happens to former college athletes’ intrinsic motivation after college, even decades later. Three hundred forty-eight former Division I college athletes completed an online survey (67.5% men, Mage = 49.2, 76% formerly on scholarship). Even after controlling for time elapsed since college, scholarship (vs. no scholarship) status was positively related to felt external motivation during college, and negatively related to present-day enjoyment of the target sport. Our findings suggest that undermining effects may persist much longer than previously documented (i.e., for decades, as opposed to hours, weeks, or months).