Divine Placebo: Health and the Evolution of Religion

Divine Placebo: Health and the Evolution of Religion. Patrik Lindenfors. Human Ecology, April 2019, Volume 47, Issue 2, pp 157–163. https://link.springer.com/article/10.1007/s10745-019-0066-7

Abstract: In this paper, I draw on knowledge from several disciplines to explicate the potential evolutionary significance of health effects of religiosity. I present three main observations. First, traditional methods of religious healers seldom rely on active remedies, but instead focus on lifestyle changes or spiritual healing practices that best can be described as placebo methods. Second, actual health effects of religiosity are thus mainly traceable to effects from a regulated lifestyle, social support networks, or placebo effects. Third, there are clear parallels between religious healing practices and currently identified methods that induce placebo effects. Physiological mechanisms identified to lie behind placebo effects activate the body’s own coping strategies and healing responses. In combination, lifestyle, social support networks, and placebo effects thus produce both actual and perceived health effects of religiosity. This may have played an important role in the evolution and diffusion of religion through two main pathways. First, any real positive health effects of religiosity would have provided a direct biological advantage. Second, any perceived health effects, both positive and negative, would further have provided a unique selling point for ‘religiosity’ per se. Actual and perceived health effects of religiosity may therefore have played an underestimated role during the evolution of religiosity through both biological and cultural pathways.

Keywords: Evolution Cultural evolution Health Placebo Religiosity Social support networks Lifestyle

Stress is experienced when an aspect of an individual's identity has the potential to be negatively evaluated; perceived appearance judgements contribute to psychological & biological stress

The effect of perceived appearance judgements on psychological and biological stress processes across adulthood. Natalie J. Sabik et al. Stress and Health, March 18 2019. https://doi.org/10.1002/smi.2863

Abstract: Social self‐preservation theory posits that stress is experienced when an aspect of an individual's identity has the potential to be negatively evaluated. Appearance is a central part of identity; however, little research has examined whether perceived appearance judgements are a source of social‐evaluative stress. In addition, stress may be an explanatory link in the association between appearance perceptions and depressive symptoms. This study examined whether perceived appearance judgements were associated with increased stress and greater depressive symptoms among adults. Study 1 examined the associations between self‐reported appearance judgements and cortisol stress responses in response to a laboratory stressor (Trier Social Stress Test) among 71 individuals aged 18–65. Study 2 assessed self‐reported appearance judgements and depressive symptoms among 498 adults ages 18–65 via an online survey data collection. Appearance judgement was associated with a stronger cortisol response, higher self‐reported stress, and greater depressive symptoms. Stress mediated all associations between appearance judgements and depressive symptoms and neither age nor gender moderated these associations. The findings suggest that appearance judgements contribute to psychological and biological stress processes and demonstrated that stress mediated the association between appearance judgements and depressive symptoms.

Between 1870 and 1916, over 80 percent of alliance ties were partially or completely covert. Otherwise, hidden military pacts are rare. Why was secrecy prevalent in this particular period and not others?

Secrecy among Friends: Covert Military Alliances and Portfolio Consistency. Raymond Kuo. Journal of Conflict Resolution, May 16, 2019. https://doi.org/10.1177/0022002719849676

Abstract: Scholars think that friendly nations adopt secrecy to avoid domestic costs and facilitate cooperation. But this article uncovers a historical puzzle. Between 1870 and 1916, over 80 percent of alliance ties were partially or completely covert. Otherwise, hidden pacts are rare. Why was secrecy prevalent in this particular period and not others? This article presents a theory of “portfolio consistency.” Public agreements undermine the rank of hidden alliances. A partner willing to openly commit to another country but not to you signals the increased importance of this other relationship. States pressure their covert partners to avoid subsequent public pacts. This creates a network effect: the more secret partners a state has, the greater the incentives to maintain secrecy in later military agreements. Covert alliances have a cumulative effect. In seeking the flexibility of hidden partnerships, states can lock themselves into a rigid adherence to secrecy.

Keywords: alliance, international alliance, international security, military alliance, secrecy

The high prevalence of intimate partner violence against women in countries with high levels of gender equality (the “Nordic paradox”) is not the result of measurement bias, but a real problem

Prevalence of intimate partner violence against women in Sweden and Spain: A psychometric study of the ‘Nordic paradox.’ Enrique Gracia et al. PLOS, May 16, 2019. https://doi.org/10.1371/journal.pone.0217015

Abstract: The high prevalence of intimate partner violence against women (IPVAW) in countries with high levels of gender equality has been defined as the “Nordic paradox”. In this study we compared physical and sexual IPVAW prevalence data in two countries exemplifying the Nordic paradox: Sweden (N = 1483) and Spain (N = 1447). Data was drawn from the European Union Agency for Fundamental Rights Survey on violence against women. To ascertain whether differences between these two countries reflect true differences in IPVAW prevalence, and to rule out the possibility of measurement bias, we conducted a set of analyses to ensure measurement equivalence, a precondition for appropriate and valid cross-cultural comparisons. Results showed that in both countries items were measuring two separate constructs, physical and sexual IPVAW, and that these factors had high internal consistency and adequate validity. Measurement equivalence analyses (i.e., differential item functioning, and multigroup confirmatory factor analysis) supported the comparability of data across countries. Latent means comparisons between the Spanish and the Swedish samples showed that scores on both the physical and sexual IPVAW factors were significantly higher in Sweden than in Spain. The effect sizes of these differences were large: 89.1% of the Swedish sample had higher values in the physical IPVAW factor than the Spanish average, and this percentage was 99.4% for the sexual IPVAW factor as compared to the Spanish average. In terms of probability of superiority, there was an 80.7% and 96.1% probability that a Swedish woman would score higher than a Spanish woman in the physical and the sexual IPVAW factors, respectively. Our results showed that the higher prevalence of physical and sexual IPVAW in Sweden than in Spain reflects actual differences and are not the result of measurement bias, supporting the idea of the Nordic paradox.

At the NIH, the proportion of all grant funds awarded to scientists under the age of 36 fell from 5.6% in 1980 to 1.5% in 2017; nearly 99% of investment are awarded to scientists or engineers 36 yo or older

Two threats to U.S. science. Bruce Alberts, Venkatesh Narayanamurti. Science, May 17 2019, Vol. 364, Issue 6441, pp. 613. DOI: 10.1126/science.aax9846

[...]

The current grant opportunities for starting a new independent research career in academia have not only become increasingly unavailable to young scientists and engineers, but are also disastrously risk-averse. At the NIH, the proportion of all grant funds awarded to scientists under the age of 36 fell from 5.6% in 1980 to 1.5% in 2017. One might ask the rhetorical question: How successful would Silicon Valley be if nearly 99% of all investments were awarded to scientists and engineers age 36 years or older, along with a strong bias toward funding only safe, nonrisky projects? Similarly, at the U.S. Department of Energy and its National Laboratories, high-risk, high-reward research and development has been severely limited [...]

U.S. leadership must focus on stimulating innovation by awarding an equal number of grants to those new investigators proposing risky new research ideas [...]. At the same time, it is imperative that the United States reconsider its visa and immigration policies, making it much easier for foreign students who receive a graduate degree in a STEM discipline from a U.S. university to receive a green card, while stipulating that each employment-based visa automatically cover a worker's spouse and children.

[...]

Milk and Dairy Product Consumption: An Overview of Systematic Reviews and Meta-Analyses Shows There is No Increase of Risk of All-Cause Mortality

Milk and Dairy Product Consumption and Risk of Mortality: An Overview of Systematic Reviews and Meta-Analyses. Ivan Cavero-Redondo et al. Advances in Nutrition, Volume 10, Issue suppl_2, May 15 2019, Pages S97–S104, https://doi.org/10.1093/advances/nmy128

ABSTRACT: The effect of dairy product consumption on health has received substantial attention in the last decade. However, a number of prospective cohort studies have shown contradictory results, which causes uncertainty about the effects of dairy products on health. We conducted an overview of existing systematic reviews and meta-analyses to examine the association between dairy product consumption and all-cause mortality risk. A literature search was conducted in MEDLINE (via PubMed), EMBASE, the Cochrane Central Database of Systematic Reviews, and the Web of Science databases from their inception to April, 2018. We evaluated the risk of bias of each study included using the AMSTAR 2 tool. The risk ratios (RRs) for each meta-analysis were displayed in a forest plot for dose-response and for high compared with low dairy consumption. The initial search retrieved 2154 articles; a total of 8 meta-analyses were finally included after applying the inclusion and exclusion criteria. The number of included studies in each meta-analysis ranged from 6 to 26 cohort studies, which reported data from 6–28 populations. The sample sizes varied across studies from 24,466 participants reporting 5092 mortality cases to 938,817 participants reporting 126,759 mortality cases. After assessing the risk of bias, 25% of the studies were categorized as acceptable, 25% as good, and 50% as very good. The RRs reported by the meta-analyses ranged from 0.96 to 1.01 per 200 g/d of dairy product consumption (including total, high-fat, low-fat, and fermented dairy products), from 0.99 to 1.01 per 200–244 g/d of milk consumption, and from 0.99 to 1.03 per 10–50 g/d of cheese consumption. The RR per 50 g/d of yogurt consumption was 0.97 (95% CI: 0.85, 1.11). In conclusion, dairy product consumption is not associated with risk of all-cause mortality. This study was registered in PROSPERO as CRD42018091856.

Keywords: milk, cheese, yogurt, butter, meta-analysis, review, mortality



Check also Dietary Protein Sources and All-Cause and Cause-Specific Mortality: The Golestan Cohort Study in Iran. Maryam S. Farvid et al. American Journal of Preventive Medicine, Volume 52, Issue 2, February 2017, Pages 237-248. https://doi.org/10.1016/j.amepre.2016.10.041

Introduction: Dietary protein comes from foods with greatly different compositions that may not relate equally with mortality risk. Few cohort studies from non-Western countries have examined the association between various dietary protein sources and cause-specific mortality. Therefore, the associations between dietary protein sources and all-cause, cardiovascular disease, and cancer mortality were evaluated in the Golestan Cohort Study in Iran.

Methods: Among 42,403 men and women who completed a dietary questionnaire at baseline, 3,291 deaths were documented during 11 years of follow up (2004–2015). Cox proportional hazards models estimated age-adjusted and multivariate-adjusted hazard ratios (HRs) and 95% CIs for all-cause and disease-specific mortality in relation to dietary protein sources. Data were analyzed from 2015 to 2016.

Results: Comparing the highest versus the lowest quartile, egg consumption was associated with lower all-cause mortality risk (HR=0.88, 95% CI=0.79, 0.97, ptrend=0.03). In multivariate analysis, the highest versus the lowest quartile of fish consumption was associated with reduced risk of total cancer (HR=0.79, 95% CI=0.64, 0.98, ptrend=0.03) and gastrointestinal cancer (HR=0.75, 95% CI=0.56, 1.00, ptrend=0.02) mortality. The highest versus the lowest quintile of legume consumption was associated with reduced total cancer (HR=0.72, 95% CI=0.58, 0.89, ptrend=0.004), gastrointestinal cancer (HR=0.76, 95% CI=0.58, 1.01, ptrend=0.05), and other cancer (HR=0.66, 95% CI=0.47, 0.93, ptrend=0.04) mortality. Significant associations between total red meat and poultry intake and all-cause, cardiovascular disease, or cancer mortality rate were not observed among all participants.

Conclusions: These findings support an association of higher fish and legume consumption with lower cancer mortality, and higher egg consumption with lower all-cause mortality.

USA 1962–2014: Absolute mobility decreases with income; individuals & families occupying the income distribution lower ranks have a higher probability of increasing income over short time periods

Growth, Inequality and Absolute Mobility in the United States,1962–2014. Yonatan Berman. https://www.dropbox.com/s/h6r650313zwqe7d/mobility_recov2.pdf

Abstract: This paper combines historical cross-sectional and longitudinal data in the US to study patterns of economic growth within the income distribution. We quantify absolute mobility as the fraction of families with higher income over a period of several years. The rates of absolute mobility over periods of two to four years are procyclical and are largely confined within 45%–55%. We also find that absolute mobility decreases with income. Individuals and families occupying the lower ranks of the income distribution have a higher probability of increasing their income over short time periods than those occupying higher ranks. This also occurs during periods of increasing inequality. Our findings stem from the importance of the changes in the composition of income percentiles. These changes are over and above mechanical labor market dynamics and life cycle effects. We offer a simplified model to mathematically describe these findings.

Keywords:Social mobility, inequality, growth, labor market dynamics

JEL Codes:D3, E2, H0, J6

Explanatory introspection, salience of one’s faults, accountability, & relationship closeness can boast success in constraining self-enhancement & self-protection strivings, but success is difficult to implement

On the doggedness of self-enhancement and self-protection: How constraining are reality constraints? Constantine Sedikides. Self and Identity, Dec 30 2018. https://doi.org/10.1080/15298868.2018.1562961

ABSTRACT: Self-enhancement and self-protection are constrained by reality. But to what extent? Broader constraints, often considered powerful, such as East-Asian culture, religion, mind-body practices, and prison environments are not particularly effective deterrents. Narrower constraints, also considered powerful, such as self-reflection and mnemic neglect, are not very helpful either. Deliberate and systematic laboratory efforts, both at the intrapersonal level (e.g., explanatory introspection, salience of one’s faults) and the interpersonal level (e.g., accountability, relationship closeness), can boast success in constraining self-enhancement and self-protection strivings, but the success is mixed, difficult to implement, and probably short-lived. The doggedness (potency and prevalence) of self-enhancement and self-protection are due to the functions or social benefits with which they are associated or confer: psychological health, goal pursuit and attainment, leadership election, and sexual selection. These functions are traceable to our species’ evolutionary past.

KEYWORDS: Self-enhancement, self-protection, reality constraints, culture, religion, mind-body practices

Testosterone and cortisol interacted to predict low pro-environmental attitudes; facial and vocal masculinization predict lower pro-environmental attitudes among men

Testosterone, facial and vocal masculinization and low environmentalism in men. Nicholas Landry, Jessica Desrochers, Steven Arnocky. Journal of Environmental Psychology, May 18 2019. https://doi.org/10.1016/j.jenvp.2019.05.007

Highlights
•    The present study is the first to examine masculinized phenotypes (facial and vocal masculinization) in relation to men’s environmentalism.
•    Testosterone (T) and cortisol (C) interacted to predict low pro-environmental attitudes, such that high T predicted lower environmental attitudes when C was high, but T also predicted higher environmental attitudes at the lowest levels of C.
•    Facial and vocal masculinization predict lower pro-environmental attitudes among men.
•    Results suggest that androgen exposure may play a role in influencing men’s pro-environmental attitudes

Abstract: Robust sex differences in environmentalism have been observed, such that males express fewer pro-environmental attitudes than their female counterparts. To date, most explanations of this sex difference have relied upon socio-cultural and psychological explanations. The present study sought to extend this inquiry by examining the role of testosterone (T), its interaction with cortisol (C), as well as androgen-linked phenotypes (facial and vocal masculinization) in relation to environmental attitudes. In a sample of 162 males, results found a TxC interaction such that high T predicted lower environmental attitudes when C was high, but T also predicted higher environmental attitudes at the lowest levels of C. Moreover, facial and vocal masculinization, as phenotypic markers of developmental T exposure, correlated negatively with pro-environmental attitudes. Together these findings suggest that both state T and putative markers of developmental T exposure negatively predict environmentalism among men, thus highlighting the potential role of androgens in understanding environmental engagement.

Swedish men born 1951–1967: Relative to men with IQ 100, the group with the lowest category of cognitive ability have 0.56 fewer children; men in the highest category have 0.09 more children

Cognitive ability and fertility among Swedish men born 1951–1967: evidence from military conscription registers. Martin Kolk and Kieron Barclay. Proceedings of the Royal Society B: Biological Sciences, May 8 2019. https://doi.org/10.1098/rspb.2019.0359

Abstract: We examine the relationship between cognitive ability and childbearing patterns in contemporary Sweden using administrative register data. The topic has a long history in the social sciences and has been the topic of a large number of studies, many reporting a negative gradient between intelligence and fertility. We link fertility histories to military conscription tests with intelligence scores for all Swedish men born 1951–1967. We find a positive relationship between intelligence scores and fertility, and this pattern is consistent across the cohorts we study. The relationship is most pronounced for the transition to a first child, and men with the lowest categories of IQ scores have the fewest children. Using fixed effects models, we additionally control for all factors that are shared by siblings, and after such adjustments, we find a stronger positive relationship between IQ and fertility. Furthermore, we find a positive gradient within groups at different levels of education. Compositional differences of this kind are therefore not responsible for the positive gradient we observe—instead, the relationship is even stronger after controlling for both educational careers and parental background factors. In our models where we compare brothers to one another, we find that, relative to men with IQ 100, the group with the lowest category of cognitive ability have 0.56 fewer children, and men with the highest category have 0.09 more children.

1. Introduction

A paradox of human behaviour in industrialized societies is that high socioeconomic status is usually negatively associated with reproductive success. This is puzzling from an evolutionary perspective in which high status is assumed to give greater access to partners as well as enhanced ability to support offspring [1–3], which was also the case in pre-industrial societies, and has likely been true throughout Homo sapiens pre-historic past [4]. It is also puzzling from an economic perspective because children are a major expenditure that should be more affordable for those with more resources [5]. The typically observed negative relationship has been described as a central problem in the evolutionary study of human behaviour [2]. The relationship between cognitive ability and fertility is an important dimension of this puzzle. For more than a century most studies have found that higher cognitive ability is associated with lower reproductive success (e.g. [2,6,7]), despite the fact that individuals with high cognitive ability achieve substantially higher socioeconomic success than individuals with lower cognitive ability [8], and both men and women rate intelligence as a desirable feature in a potential mate [9]. Furthermore, it has been suggested that the evolution of high cognitive ability in Homo sapiens is attributable to positive selection on intelligence, as higher intelligence facilitated greater social interaction capabilities, which in turn led to greater reproductive success [10,11]. Empirical evidence suggests that the link between socioeconomic success, likely associated with high cognitive ability, and reproductive success was positive in a wide variety of pre-industrial societies [4,12]. By contrast, the empirical evidence for the relationship between socioeconomic status and fertility over the past two centuries is ambiguous, with most studies reporting a negative association. In this study, we revisit this research question, applying a rigorous statistical treatment to high-quality population data to study the relationship between cognitive ability and fertility in contemporary Sweden.

People are more likely to think vaccines are safe, to say they intend to vaccinate, and to actually vaccinate their children when their preferred party is in power

Krupenkin, Masha, Does Partisanship Affect Compliance With Government Recommendations? (October 16, 2018). SSRN http://dx.doi.org/10.2139/ssrn.3290237

Abstract: Because of polarization, Democrats and Republicans have different levels of government trust depending on which party is in power. To what degree does differential trust affect partisan willingness to comply with government recommendations? To answer this question, I analyze compliance with government vaccination recommendations in three separate cases, using survey data and kindergarten vaccination data spanning both the George W. Bush and Obama administrations. I find that people are more likely to think vaccines are safe, more likely to say they intend to vaccinate, and more likely to actually vaccinate their children when their preferred party is in power. Using mediation analysis, I confirm that partisan differences in perceptions of vaccine safety are due to differences in government trust. These findings suggest that partisanship significantly impacts behavior, even in domains concerning health and medical care.

Keywords: partisanship, parties, polarization

Females are more egalitarian than men, like left-leaning voters; men are relatively more efficiency minded, like right-leaning voters; left & right extremes are very egalitarian

Fairness Views and Political Preferences -Evidence from a representative sample. Daniel Müller, Sander Renes. Universitaet Innsbruck, Working Papers in Economics and Statistics 2019-08. May 2019. https://www2.uibk.ac.at/downloads/c4041030/wpaper/2019-08.pdf

Abstract: We elicit distributional fairness ideals of impartial spectators using an incentivized elicitation in a large and heterogeneous sample of the German population. We document several empirical facts: i) egalitarianism is the predominant ideal; ii) females are more egalitarian than men; iii) men are relatively more efficiency minded; iv) left-leaning voters are more likely to be egalitarians whereas right-leaning voters are more likely to be efficiency minded; and v) youngand highly-educated participants hold different fairness ideals than the rest of the population. Moreover, we show that the fairness ideals predict preferences for redistribution and intervention by the government, as well as actual charitable giving, even after controlling for a range of covariates. Hence, our paper contributes to our understanding of the underpinnings of voting behavior and ideological preferences, as well the literature that links lab and field behavior.

Keywords: Distributional fairness, impartial spectator, representative sample, po-litical attitudes, voting behavior, lab to field

Humor production in long-term romantic relationships: What the lack of moderation by sex reveals about humor’s role in mating

Humor production in long-term romantic relationships: What the lack of moderation by sex reveals about humor’s role in mating. Jeffrey A. Hall. International Journal of Humor Research, May 15 2019. https://doi.org/10.1515/humor-2018-0005

Abstract: This manuscript explores whether the associations between partner humor production and relationship satisfaction and humor’s importance in romantic relationships are moderated by sex. Study 1 reports a meta-analysis (k = 10; N = 2,167) of the association between partner humor production (i.e., perceived; partner effects) and relationship satisfaction, and whether associations were moderated by participant sex. Contrary to predictions, partner humor production was more strongly associated to men’s relationship satisfaction than women’s satisfaction. Study 2 surveyed pairs of romantic partners (N = 246) regarding their production of humor, their appreciation of partner humor, and the importance of humor in their relationship. Results indicated no moderations by sex in the association between partner humor production and humor’s importance in the relationship.

Keywords: humor; meta-analysis; relationship satisfaction; romantic relationship

1 Introduction

When seeking a new romantic partner, individuals often seek a mate with a good sense of humor while advertising their own sense of humor (Wilbur and Campbell 2011). In initial interactions between cross-sex strangers, couples that laugh together are more likely to report mutual romantic interest (Grammer and Eibl-Eibesfeldt 1990; Hall 2015). As in many courtship contexts, sex differences in partner preferences and behaviors complicate this general preference for humorous mates. Specifically, humor production in men is typically evaluated more positively by women, compared to the desirability of humor production in women as evaluated by men (Bressler et al. 2006; Lundy et al. 1998; Wilbur and Campbell 2011).

To explain this sex difference, researchers have turned to sexual strategies theory (SST; Buss and Schmitt 1993). The theory suggests that males and females should find different traits more appealing when seeking a short-term mate (e.g., a one-night stand) versus a long-term mate (e.g., marriage). If humor production during courtship is a way to assess the likelihood of long-term cooperation and compatibility, then women ought to favor humor more highly in potential long-term partners than in short-term partners – a tendency supported by past research (e.g., Bressler et al. 2006; Hone et al. 2015; Tornquist and Chiappe 2015). Thus, humor production has been conceptualized a reliable signal of long-term compatibility and enhanced likelihood of relationship success.

This multi-study investigation attempts to answer the question, are sex differences in the value placed on partner humor production when evaluating potential partners comparable to sex differences in the benefits conferred by humor in actual long-term romantic relationships? Specifically, the present investigation will attempt to answer three research questions: (i) Do women, more so than men, experience greater relationship satisfaction when their partners engage in more humor production? (ii) Do women, more so than men, perceive humor as more importance to the relationship when they have partners who produce more humor? (iii) Is the production-importance association mediated by appreciation of one’s partner’s sense of humor? By examining whether the benefits of partner humor production in heterosexual romantic relationship are moderated by sex, the present manuscript will contribute to both research on mate selection and research on the role of humor in long-term relationships.

3 Sexual strategies theory: Humor and long-term versus short-term mating

Sexual strategies theory (Buss and Schmitt 1993) suggests that males and females should find different traits more appealing when seeking a short-term mate (e.g., a one-night stand) versus a long-term mate (e.g., marriage). When seeking short-term mates, women are thought to prefer traits indicative of high quality genes in men, but when seeking long-term mates, women are thought to prefer traits indicative of good parenting and long-term mating success. Tornquist and Chiappe (2015) suggest that humor production during courtship is a way to assess the likelihood of long-term cooperation and compatibility. In finding someone who shares that sense of humor, many joint endeavors involved in long-term relationships and parenting may be more pleasant and cooperative. Several studies have made the distinction between short- and long-term relationships when evaluating humor production in courtship. Bressler et al. (2006) found that women preferred humor production in men in long-term relationships compared to short-term ones. Hone et al. (2015) report the sex difference in preference for a humor-producing partner favoring women was greater in long-term and committed dating conditions compared to short-term mating conditions. Similarly, Tornquist and Chiappe (2015) found that when seeking a long-term relationship, women more favorably rated humor production in men than did men in women. For short-term relationships, sex differences in preferences were not detected (Tornquist and Chiappe 2015). In sum, women favor humor production in men particularly when seeking a long-term partnership, particularly when the humor is warm and positive (Didonato et al. 2013). As predicted by SST, women should value warmth, cooperation, and social facility in men, particularly in the context of long-term pairing, because such traits would engender a more satisfying relationship. This leads to the question, is humor production associated with such benefits in long-term relationships?

Some species share foundational social cognitive mechanisms with humans, like ascription of mental states that require simultaneously representing one's own & another's conflicting motives or views

Theory of mind in animals: Current and future directions. Christopher Krupenye, Josep Call. Wiley Interdisciplinary Reviews: Cognitive Science, May 17 2019. https://doi.org/10.1002/wcs.1503

Abstract: Theory of mind (ToM; a.k.a., mind‐reading, mentalizing, mental‐state attribution, and perspective‐taking) is the ability to ascribe mental states, such as desires and beliefs, to others, and it is central to the unique forms of communication, cooperation, and culture that define our species. As a result, for 40 years, researchers have endeavored to determine whether ToM is itself unique to humans. Investigations in other species (e.g., apes, monkeys, corvids) are essential to understand the mechanistic underpinnings and evolutionary origins of this capacity across taxa, including humans. We review the literature on ToM in nonhuman animals, suggesting that some species share foundational social cognitive mechanisms with humans. We focus principally on innovations of the last decade and pressing directions for future work. Underexplored types of social cognition have been targeted, including ascription of mental states, such as desires and beliefs, that require simultaneously representing one's own and another's conflicting motives or views of the world. Ongoing efforts probe the motivational facets of ToM, how flexibly animals can recruit social cognitive skills across cooperative and competitive settings, and appropriate motivational contexts for comparative inquiry. Finally, novel methodological and empirical approaches have brought new species (e.g., lemurs, dogs) into the lab, implemented critical controls to elucidate underlying mechanisms, and contributed powerful new techniques (e.g., looking‐time, eye‐tracking) that open the door to unexplored approaches for studying animal minds. These innovations in cognition, motivation, and method promise fruitful progress in the years to come, in understanding the nature and origin of ToM in humans and other species.

Sexual orientation differences in the self-esteem of men and women: A systematic review and meta-analysis

Bridge, L., Smith, P., & Rimes, K. A. (2019). Sexual orientation differences in the self-esteem of men and women: A systematic review and meta-analysis. Psychology of Sexual Orientation and Gender Diversity, May 2019. http://dx.doi.org/10.1037/sgd0000342

Abstract: Sexual minority individuals experience higher rates of mental health problems than heterosexual people. It has been suggested that minority stress explains this disparity, partly by elevating rates of general psychological risk factors such as low self-esteem. This study investigated self-esteem in sexual minority people compared with heterosexual people through a systematic review and meta-analysis. A systematic search of four databases was conducted. Observational studies comparing self-esteem in sexual minority and heterosexual men and women separately were included. A qualitative synthesis and random effects meta-analysis were conducted. Potential moderators were explored using subgroup analyses of age, sexual minority orientation, and sample type. Thirty-two eligible studies were identified; 25 compared self-esteem in men and 19 in women. Most studies used the Rosenberg Self-Esteem Scale (RSES) to measure self-esteem. Compared with heterosexual men and women, there was significantly lower self-esteem in sexual minority men (SMD = −0.33, 95% CI [−0.44, −0.23]) and women (SMD = −0.20, 95% CI [−0.29, −0.11]). This difference appeared to be moderated by sample type: There was preliminary evidence for more robust differences in men and bisexual individuals. Findings are consistent with the suggestion that self-esteem is lower in sexual minorities than in heterosexual individuals. However, caution is required in drawing firm conclusions due to methodological limitations of the included studies. Self-esteem is a potential target for intervention to prevent psychological disorders in this population