The present research examines how inferences about moral norms from descriptive norms change by perceptions of others' motives in the context of environmental behavior. When individuals think that many others engage in an environmental behavior (e.g., water and energy conservation) for prosocial (vs. proself) motives, they infer moralization about the behavior in a given context. They infer stronger injunctive norms about the behavior and expect others to experience moral outrage at violation of the moral standard (e.g., wasting water and energy). The moral norm perceptions predict people's motivation to engage in environmental behavior themselves. We further show that expected guilt and shame if not engaging in normative behavior explain the effects of prosocial-motivated (vs. proself-motivated) norms. Together, perceived motives behind descriptive norms change people's inferences about moral implications of normative behavior and their motivation to engage in normative behavior.

Fundamental frequency ( fo) is the most perceptually salient vocal acoustic parameter, yet little is known about how its perceptual influence varies across societies. We examined how fo affects key social perceptions and how socioecological variables modulate these effects in 2,647 adult listeners sampled from 44 locations across 22 nations. Low male fo increased men's perceptions of formidability and prestige, especially in societies with higher homicide rates and greater relational mobility in which male intrasexual competition may be more intense and rapid identification of high-status competitors may be exigent. High female fo increased women's perceptions of flirtatiousness where relational mobility was lower and threats to mating relationships may be greater. These results indicate that the influence of fo on social perceptions depends on socioecological variables, including those related to competition for status and mates.

This research examines how exposure to different motives of scientists affects the impact of scientific consensus on public attitudes toward cultured meat. While scientific consensus on the safety of cultured meat generally increased positive attitudes toward it, this effect depended on information about scientists’ motives. Exposure to information about scientists’ financial motives weakened the positive effect of scientific consensus because it undermined trust in scientists. Information about scientists’ prosocial motives did not influence the scientific consensus effect. These findings suggest that perceived motives can shift trust in experts, thereby affecting the influence of experts on public attitudes.

Abstract Given the centrality of mating and reproduction in the long course of human evolution, the selection of mates is a critical adaptive challenge that humans have needed to successfully confront throughout evolutionary history. This chapter provides an overview of major evolutionary theories of human mating, describes key hypotheses of mate preference psychology, and reviews relevant empirical research for the early stages of mate selection. We discuss mate preference adaptations for selecting both long-term and short-term mates, as well as methodological issues, controversies, and other developments that have, in recent years, surfaced in the mate-selection literature.

Abstract Not all mates are equally reproductively fit. As such, it makes sense that humans have evolved mate preferences to guide the evaluation and selection of partners who offer more versus less reproductive value. This chapter examines theory and empirical work on evolved preferences for long- and short-term mates and considers the emergence of new forms of casual, hybrid relationships. It examines basic sex-differentiated preferences for physical attractiveness and resources, as well as the prioritization of these traits, and developments in uncovering the processes that underlie the holistic valuation of a potential mate’s value. The chapter then discusses the criticisms and debates on the validity of mate preferences and research on mate preferences fluctuating adaptively with women’s menstrual cycle. Finally, the chapter closes with a consideration of principles of evolutionary mismatch, which may explain why there is a disconnect between theory and findings and why humans and other species are mating with human-made objects rather than their conspecifics.

In established relationships, are couples who are funny more satisfied with each other, or are satisfied couples more able to see the funny side of their partners? Much research has examined the evolutionary function of humor in relationship initiation, but not in relationship maintenance. Using a dyadic daily-diary study composed of college students from Singapore, results showed that relationship quality was positively associated with same-day humor production and perception. Importantly, and consistent with an interest-indicator perspective in which humor exchanges communicate relationship interest, relationship quality was also positively associated with next-day humor production and perception, and across both sexes. Results also indicated some support for a sexual-selection perspective in which humor exchanges predicted only same- and next-day satisfaction, but not commitment. Our findings suggest that humor can ultimately function as a strategy to monitor and maintain established relationships.

OBJECTIVE Evolved mate preferences have taken center stage in evolutionary psychology research, yet this literature has been fairly muted on mate preferences for extrapair partners. Here, we examined the mate preferences for mistress relationships (the traits that men prioritize in a mistress and mistresses prioritize in their male partners) and compared these preferences to those of short- and long-term relationships. METHOD In two studies (N Study 1a = 104, N Study 1b = 191), we derived dimensions of mate preferences through exploratory factor analyses. In subsequent studies (N Study 2 = 219, N Study 3 = 101) we employed a budget allocation paradigm, where participants designed their ideal mates for different relationship types (short-term, long-term, mistress relationships). RESULTS Whereas men focused on fulfilling short-term mating ideals (by prioritizing physical attractiveness) in a mistress relationship, women focused on fulfilling longer-term (but also some short-term) mating ideals (prioritizing both physical attractiveness and social status) for a mistress relationship CONCLUSION: Findings indicate that mistress relationships reflect a compromise of men's and women's (conflicting) mating ideals and contribute to an understanding of relationships that are neither completely short- nor long-term in nature.

How does psychology vary across human societies? The fundamental social motives framework adopts an evolutionary approach to capture the broad range of human social goals within a taxonomy of ancestrally recurring threats and opportunities. These motives-self-protection, disease avoidance, affiliation, status, mate acquisition, mate retention, and kin care-are high in fitness relevance and everyday salience, yet understudied cross-culturally. Here, we gathered data on these motives in 42 countries (N = 15,915) in two cross-sectional waves, including 19 countries (N = 10,907) for which data were gathered in both waves. Wave 1 was collected from mid-2016 through late 2019 (32 countries, N = 8,998; 3,302 male, 5,585 female; Mage = 24.43, SD = 7.91). Wave 2 was collected from April through November 2020, during the COVID-19 pandemic (29 countries, N = 6,917; 2,249 male, 4,218 female; Mage = 28.59, SD = 11.31). These data can be used to assess differences and similarities in people's fundamental social motives both across and within cultures, at different time points, and in relation to other commonly studied cultural indicators and outcomes.

Demands and stressors from work increasingly encroach upon people's family lives in modern settings, resulting in poorer familial relationships and impaired psychological health. The current study proposed and examined dispositional optimism as a potential psychological buffer of the deleterious impact of negative work-to-family spillover (WFS) on psychological health. Based on a sample of employed midlife adults in the United States (N = 1,252) drawn from a large and nationally representative dataset, MIDUS 3, we found that dispositional optimism significantly moderated the relationship between negative WFS and subjective well-being, even after controlling for a variety of potential confounds. However, this moderation effect was not consistently observed for the relationship between negative WFS and depressive symptoms, suggesting that the buffering utility of dispositional optimism may be limited to day-to-day subjective well-being and may not extend to the domain of mental health issues. Nonetheless, our findings indicate the potential importance of considering psychological resources in our efforts to mitigate strains on psychological health arising from negative WFS - to which future studies are encouraged to explore further.

To date, the study of cultural tightness has been largely limited to exploring the strictness of social norms and the severity of punishments at the level of nations or regions. However, cultural psychologists concur that humans gather cultural information from more than just their nationality. Gender is a cultural identity that confers its own social norms. Across three studies using multi-method designs, we find that American women feel the culture surrounding their gender is "tighter" than that for men, and that this relationship is mediated by perceived gender-related threats to the self. However, in a follow-up study in Singapore, we do not find measurement invariance, suggesting future work is necessary to refine the study of gender tightness cross-culturally. We close with an important discussion of understanding how tightness looks across a variety of cultural identities and introduce a novel, qualitative method for the study of the tightness of social norms within groups.

Mating and reproduction are central to natural selection, and decisions associated with one’s choice of mate can have significant fitness consequences. From an evolutionary perspective, attraction functions to direct one’s attention and energy toward pursuing, mating with, and retaining individuals who display traits that contribute to greater survival and reproductive success. Humans are theorized to possess a suite of psychological mechanisms that facilitate the identification of such individuals. One trait that humans have potentially evolved to be attracted to is genetic dissimilarity or diversity in the major histocompatibility complex, which is argued to promote greater immunocompetence and pathogen resistance and, hence, health in one’s mate and putative offspring. Another trait is bilateral symmetry, which is theorized to function as a cue to a potential mate’s genetic quality and ability to withstand developmental stressors. Yet another trait is sexual dimorphism. Women are theorized to be attracted to masculinity in men, which is theorized to function as a reliable signal of underlying genetic quality. In contrast, men are theorized to be attracted to femininity in women, which is argued to signal their reproductive viability. Importantly, evolutionary perspectives propose that many attraction mechanisms evolved to adaptively adjust to local conditions. Thus, when faced with high pathogen prevalence, people have heightened preferences for symmetry, which indicates having good genes and thus, greater ability to withstand disease. As another example, when potential mates of the other sex are in relative abundance, people tend to be more selective in their mate choice and exaggerate their preferences for other-sex mates with sex-typical traits. Additionally, near peak fertility, women may have evolved to increase their preferences for masculinity in men, which signals underlying genetic quality. In addition to having psychological mechanisms that facilitate the identification of potential mates, humans may have also evolved psychological mechanisms that adaptively increase the motivation to allocate attention and energy toward pursuing viable mates that have been identified. Both sets of psychological mechanisms are necessary to successful mate selection, and likely operate in tandem. In this regard, dopamine may be centrally involved in driving behaviors associated with attraction and mate pursuit. Finally, recent studies have shown that the evidence for some of the hypothesized attraction preferences is not conclusive; future scholarship will profit from more careful research design and robust methodology.

Evolutionary game theory and public goods games offer an important framework to understand cooperation during pandemics. From this perspective, the COVID-19 situation can be conceptualized as a dilemma where people who neglect safety precautions act as free riders, because they get to enjoy the benefits of decreased health risk from others' compliance with policies despite not contributing to or even undermining public safety themselves. At the same time, humans appear to carry a suite of evolved psychological mechanisms aimed at curbing free riding in order to ensure the continued provision of public goods, which can be leveraged to develop more effective measures to promote compliance with regulations. We also highlight factors beyond free riding that reduce compliance rates, such as the emergence of conspiratorial thinking, which seriously undermine the effectiveness of measures to suppress free riding. Together, the current paper outlines the social dynamics that occur in public goods dilemmas involving the spread of infectious disease, highlights the utility and limits of evolutionary game-theoretic approaches for COVID-19 management, and suggests novel directions based on emerging challenges to cooperation.

Extant findings are mixed on whether social exclusion impacts prosociality. We propose one factor that may underlie the mixed results: Cynicism. Specifically, cynicism may moderate the exclusion-prosociality link by influencing interpersonal empathy. Compared to less cynical individuals, we expected highly cynical individuals who were excluded to experience less empathy and, consequently, less prosocial behavior. Using an online ball-tossing game, participants were randomly assigned to an exclusion or inclusion condition. Consistent with our predictions, the effect of social exclusion on prosociality through empathy was contingent on cynicism, such that only less-cynical individuals responded to exclusion with greater empathy, which, in turn, was associated with higher levels of prosocial behavior. We further showed this effect to hold for cynicism, but not other similar traits typically characterized by high disagreeableness. Findings contribute to the social exclusion literature by suggesting a key variable that may moderate social exclusion's impact on resultant empathy and prosocial behavior and are consistent with the perspective that people who are excluded try to not only become included again but to establish alliances characterized by reciprocity.