The desire for sexual variety as a key to understanding basic human mating strategies

Different authors have proposed competing evolutionary theories of human mating. Some argue that both sexes are designed to pursue a singular long‐term mating strategy. Others contend that both sexes are designed to function as essentially multiple maters. Sexual Strategies Theory (SST; D.M. Buss & D.P. Schmitt, 1993), in contrast, proposes that men and women have evolved short‐term and long‐term mating strategies that are pursued differently by each sex depending on theoretically derived dimensions of context. According to SST, the sexes tend to differ in the nature and prominence of the short‐term component of human mating–particularly the short‐term desire for sexual variety. The current research was designed to test competing empirical predictions from these contrasting theories by focusing on sex differences in the desire for sexual variety. Study 1 (N= 1,049), consisting of five separate samples, found large and consistent sex differences in the desire for short‐term sexual variety, even after employing statistical methods to control for skewed distributions and statistical outliers. Study 2 (N= 192) confirmed the results of Study 1 using an older, more mature sample. Study 3 (N= 50) again replicated these sex differences using an observer‐based method of inquiry. Study 4 (N= 167) found evidence that short‐term mating was unrelated generally to psychological dysfunction and may be related to mentally healthy personality characteristics in men. Discussion focuses on the viability of pluralistic compared with monomorphic evolutionary theories of human mating strategies.     

Can men and women be just friends?

We tested evolution‐based hypotheses about (1) sex differences in perceived benefits and costs of opposite‐sex friendship and (2) differences in perceived benefits of same‐sex friendships and opposite‐sex friendships. In the Preliminary Study (N= 400), an act nomination procedure was used to identify the benefits and costs of same‐sex friendships and opposite‐sex friendships. In Study 1, a total of 231 participants (100 men, 131 women) evaluated the frequency of occurrence of 100 benefits and costs in their closest same‐sex friendship or opposite‐sex friendship. In Study 2, a total of 229 participants (92 men, 137 women) evaluated how beneficial and how costly each would be if it were to occur in their closest same‐sex friendship or opposite‐sex friendship. Results supported several key hypotheses. Men perceived sex with their opposite‐sex friends as more beneficial than did women. Women reported receiving protection from their opposite‐sex friends more often than did men, and they perceived the protection as highly beneficial. Both men and women reported receiving information from opposite‐sex friends about how to attract mates, and they perceived this information as beneficial. The discussion focuses on whether these benefits reflect an evolved psychology of opposite‐sex friendship, or instead are incidental by‐products.     

Sweets,Sex, or Self‐Esteem? Comparing the Value of Self‐Esteem Boosts With Other Pleasant Rewards

Abstract Many people ascribe great value to self‐esteem, but how much value? Do people value self‐esteem more than other pleasant activities, such as eating sweets and having sex? Two studies of college students ( Study 1 : N=130; Study 2 : N=152) showed that people valued boosts to their self‐esteem more than they valued eating a favorite food and engaging in a favorite sexual activity. Study 2 also showed that people valued self‐esteem more than they valued drinking alcohol, receiving a paycheck, and seeing a best friend. Both studies found that people who highly valued self‐esteem engaged in laboratory tasks to boost their self‐esteem. Finally, personality variables interacted with these value ratings. Entitled people thought they were more deserving of all pleasant rewards, even though they did not like them all that much (both studies), and people who highly value self‐esteem pursued potentially maladaptive self‐image goals, presumably to elevate their self‐esteem ( Study 2 ).     

The affective shift hypothesis: The functions of emotional changes following sexual intercourse

This article develops the Affective Ship Hypothesis, which suggests that women experience positive affective shifts following first‐time intercourse as a means to facilitate a longer‐term, more committed relationship. The hypothesis predicts a negative affective shift in men who pursue a short‐term mating strategy; this shift is hypothesized to function to curtail commitment by motivating the man to terminate the relationship. Study 1 (N= 177) documented sex differences predicted by the affective shift hypothesis. Study 2 (N= 203), using a somewhat different methodology involving reports of presex and postsex feelings, found that men with high numbers of sex partners, but not men with low numbers of partners, experienced a decrease in their partner's physical and sexual attractiveness following first‐time sexual intercourse. In contrast, women, more than men, experienced increases in feelings of love and commitment following first‐time sex.     

Behavior expectations in cross‐sex friendships,same‐sex friendships,and romantic relationships

Abstract In 2 studies, university students from the United States rated the importance of 43 behavior expectations about their cross‐sex friends, same‐sex friends and romantic partners. In Study 1, all 399 participants had a current romantic partner, whereas in Study 2, romantic partner status varied across the 165 participants. Participants always rated their expectations for romantic partners higher than for either type of friend, and expectations for behaviors promoting emotional closeness were always rated higher than expectations about behaviors promoting social companionship or relationship positivity. In Study 2, expectations for cross‐sex friends were rated lower and more similar to same‐sex friends when participants had a current romantic partner than when they did not.     

Self‐enhancement,crash‐risk optimism and the impact of safety advertisements on young drivers

In Study 1, young drivers (aged between 16 and 29 years, N=314) rated their driving attributes relative to their peers. They also rated their likelihood of being involved in a crash relative to their peers (crash‐risk optimism), their crash history, stereotype of the young driver, and concern over another health issue. A self‐enhancement bias was found for all items in which self/other comparisons were made. These items formed two major factors, perceived relative driving ability and perceived relative driving caution. These factors and perceived luck relative to peers in avoiding crashes significantly predicted crash‐risk optimism. In Study 2, an experimental group of young drivers (N=173) watched safety advertisements that showed drinking and dangerous driving resulting in a crash, and a control group (N=193) watched advertisements showing people choosing not to drive after drinking. Each group then completed the self/other comparisons used in Study 1. The same factors were found, but only driving caution significantly predicted crash‐risk optimism. The experimental group showed more self‐enhancement on driving ability than the control group. In both studies, men showed substantially more self‐enhancement than women about their driving ability. Implications for safety interventions are discussed.     

Sex differences in reactions to outperforming same‐sex friends

The current studies were designed to examine whether female adolescents have more negative reactions than male adolescents to achieving more than their same‐sex friends. In Study 1, 51 females and 48 males from grades 8 and 10 were administered questions assessing their reactions to performing better than their closest same‐sex friends in four domains. Across domains, females reported more negative reactions than males. Further, compared with males, female participants believed that their same‐sex friends would have more negative reactions if they performed better than their friends. In Study 2, 48 females and 49 males age 18 years were asked how they felt about performing better than and equal to their closest same‐sex friends in the domains of romance and academics in both hypothetical and actual situations. Females reported feeling more positive when they received the same outcomes as opposed to better outcomes than their friends. Males did not differ in the valence of their responses to the two outcomes. The implications for sex differences in achievement and friendship are discussed.     

Uncovering the diverse cultural bases of social identity: Ingroup ties predict self‐stereotyping among individualists but not among collectivists

On what basis do people form their social identities? To investigate this issue, the present research investigates cross‐cultural differences in self‐stereotyping, a key outcome of social identification. In particular, the research tests the hypothesis that ingroup ties are a stronger predictor of self‐stereotyping among people from individualist cultures than among people from collectivist cultures. In Study 1, university students (N = 117) completed measures of ingroup ties and self‐stereotyping with respect to an intimacy group (family and friends). Consistent with predictions, ingroup ties significantly predicted self‐stereotyping among individualists but not among collectivists. Study 2 (N = 104) found a similar pattern of results among members of the global internet community who considered either an intimacy group (their friends), a task group (their work group) or a social category (their gender). These results indicate that people in individualist cultures are more likely than those in collectivist cultures to base their social identities on ingroup ties. The implications of these results are discussed in relation to self‐categorization theory's depersonalization account of social identification.     

Preference for Same‐ Versus Cross‐Sex Friendships1

How is preferring same‐ vs. cross‐sex friendships related to one's perceptions of these friendships? In Phase 1, college students (N = 122) listed qualities they valued in their same‐ and cross‐sex friends. In Phase 2, survey items constructed from the responses were administered to 231 students who indicated a preference for same‐ vs. cross‐sex friendship. Those who reported a preference for opposite‐sex friends rated these friendships as higher in closeness, trust, caring, having common interests, and providing narcissistic benefits, compared to those who reported a preference for same‐sex friends. Results demonstrate that gender differences often associated with close friendships are greatly attenuated and sometimes reversed when preference for same‐ vs. cross‐sex friendship is included as a moderating variable.     

Conceptions of aggression and withdrawal in early childhood

Two studies investigate young children's beliefs about aggression and withdrawal in others with reference to the possibility of stability and change. Study 1 (N=41) provides evidence that preschool children (1) view aggression in more essentialist ways (i.e. they believe it to be more stable and less changeable) than withdrawal and (2) believe that friends hold a greater potential to create change in aggression and withdrawal than do other potential sources of influence, such as parents and teachers. Study 2 (N=25) replicates the findings of Study 1 and also demonstrates that by preschool age, children hold systematic ideas about the effectiveness of strategies that friends can use to change the behaviour of their peers. These ideas include the belief that prosocial strategies, such as showing peers how to make friends, are more effective than requests to stop engaging in undesirable behaviour. Study 2 also demonstrates that preschool‐aged participants engaged in essentialist reasoning to a greater extent than did a comparison group of 20 7–8 year olds. Copyright © 2004 John Wiley & Sons, Ltd.     

The evil eye effect: vertical pupils are perceived as more threatening

Popular culture has many examples of evil characters having vertically pupilled eyes. Humans have a long evolutionary history of rivalry with snakes and their visual systems were evolved to rapidly detect snakes and snake-related cues. Considering such evolutionary background, we hypothesised that humans would perceive vertical pupils, which are characteristics of ambush predators including some of the snakes, as threatening. In seven studies (aggregate N?=?1458) conducted on samples from American and Turkish samples, we found that vertical pupils are perceived as more threatening on both explicit (Study 1) and implicit level (Studies 2–7) and they are associated with physical, rather than social, threat (Study 4). Findings provided partial support regarding our hypothesis about the relevance of snake detection processes: Snake phobia, and not spider phobia, was found to be related to perceiving vertical pupils as threatening (Study 5), however an experimental manipulation of saliency of snakes rendered no significant effect (Study 6) and a comparison of fears of snakes, alligators, and cats did not support our prediction (Study 7). We discuss the potential implications and limitations of these novel findings.     

How happiness expectations relate to the Dark Triad traits

ABSTRACT

In samples of Americans (N = 273) and Indians (N = 194) paid through Mechanical Turk (Study 1) and British (N = 132) volunteers contacted through Reddit (Study 2), we examined how the Dark Triad traits (i.e., psychopathy, narcissism, and Machiavellianism) were associated with happiness expectations when participants imagined solving adaptive tasks. In Study 1, the traits were linked to forecasted happiness in achieving status and power and mate-seeking, with psychopathy demonstrating less happiness when pursuing slow life history tasks (e.g., avoiding diseases), whereas the other two traits led to expectations of happiness when forming social bonds, retaining mates, and avoiding pathogens. In Study 2, the traits were associated with choosing to pursue mating opportunities to induce happiness. Women expected more happiness in response to ensuring their safety over pursuing mating opportunities. We suggest happiness might be an affective feedback system that rewards people for pursuing their life history goals.     

Brains,brawn, and beauty: The complementary roles of intelligence and physical aggression in attracting sexual partners

The current study compared physical aggression to factors affecting socioeconomic status in the accumulation of sex partners over the life course. Our data sample was drawn from the National Longitudinal Study of Adolescent to Adult Health (men, n = 5,636; women, n = 6,787). Participants were examined in terms of the number of lifetime sex partners they reported, nonrelationship partners, cheating or infidelity, and concurrent relationships. Intelligence and physical violence emerged as being especially likely to boost sex partner accumulation for the number of lifetime sex partners and nonrelationship partners in men. Intelligence also interacted positively with men's violence in cross‐sectional models but not longitudinally. Women's violence was not significant regardless of the outcome or model specification. Intelligence showed less consistent effects for women's mating indicators compared to men. Analyses controlled for well‐known correlates of aggression and sexual behavior and factors associated with beauty, including interviewer reports of survey participants' physical attractiveness and maturity, as well as self‐reported attractiveness, maturity, and health. Findings are consistent with evolutionary ideas regarding costly signaling as an effective mating strategy among men.     

Feeling bad about progress does not lead people want to change their health behaviour

Objective: When do people decide to do something about problematic health behaviours? Theoretical models and pragmatic considerations suggest that people should take action when they feel bad about their progress – in other words, when they experience negative progress-related affect. However, the impact of progress-related affect on goal striving has rarely been investigated.

Design and Methods: Study 1 (N = 744) adopted a cross-sectional design and examined the extent to which measures of progress-related affect were correlated with intentions to take action. Study 2 (N = 409) investigated the impact of manipulating progress-related affect on intentions and behaviour in an experimental design.

Results: Study 1 found that, while engaging in health behaviours had the expected affective consequences (e.g. people felt bad when they were not eating healthily, exercising regularly or limiting their alcohol consumption), it was feeling good rather than bad about progress that was associated with stronger intentions. Study 2 replicated these findings. Participants induced to feel good about their eating behaviour had marginally stronger intentions to eat healthily than participants led to feel bad about their eating behaviour.

Conclusion: The findings have implications for interventions designed to promote changes in health behaviour, as well as theoretical frameworks for understanding self-regulation.     

Who Do We Tell and Whom Do We Tell On? Gossip as a Strategy for Status Enhancement1

College students ranked the interest value of 12 different gossip scenarios; likelihood of spreading the gossip; and the people to whom they would be most likely to tell the gossip, depending on whether the gossip was about male or female professors, relatives, friends, acquaintances, strangers, or a same‐sex rival or a romantic partner. Damaging, negative news about rivals and positive news about friends and lovers was especially prized and likely to be passed on. Aside from romantic partners, males and females were more interested in information about same‐sex others than about opposite‐sex others. Overall, men were most likely to confide in their romantic partners, but females were equally likely to share gossip with their lovers and their same‐sex friends.     

The Role of Individual Factors in Friendship Formation: Considering Shyness,Self‐Esteem,Social Skills,and Defensive Pessimism

The purpose of this study was to examine the effects of four individual factors (shyness, self‐esteem, social skills, and defensive pessimism) on the formation of friendships among undergraduate students. Freshmen (N = 93) completed a questionnaire assessing their shyness, self‐esteem, social skills, and level of defensive pessimism. Then, they answered questions about interpersonal indices (number of friends, satisfaction with friendships, their willingness to continue relationships, and their feelings of interpersonal friction). After 3 months, they completed a questionnaire about their anxiety state and behavior when talking with the people they had met since university admission. Moreover, they discussed the interpersonal indices they used in a pre‐questionnaire. Path analysis indicated that shyness directly leads to having fewer friends, whereas social skills lead to having more friends through extroversive behavior. Moreover, self‐esteem was positively related to an increase in the willingness to continue relationships, and reflection and pessimistic thinking (which is one component of defensive pessimism) led to a feeling of being fatigued from the effort of considering and respecting the reactions of others.     

Exposure to intergroup conspiracy theories promotes prejudice which spreads across groups

This research experimentally examined the effects of exposure to intergroup conspiracy theories on prejudice and discrimination. Study 1 (N = 166) demonstrated that exposure to conspiracy theories concerning immigrants to Britain from the European Union (vs. anti-conspiracy material or a control) exacerbated prejudice towards this group. Study 2 (N = 173) found the same effect in a different intergroup context – exposure to conspiracy theories about Jewish people (vs. anti-conspiracy material or a control) increased prejudice towards this group and reduced participants’ willingness to vote for a Jewish political candidate. Finally, Study 3 (N = 114) demonstrated that exposure to conspiracy theories about Jewish people not only increased prejudice towards this group but was indirectly associated with increased prejudice towards a number of secondary outgroups (e.g., Asians, Arabs, Americans, Irish, Australians). The current research suggests that conspiracy theories may have potentially damaging and widespread consequences for intergroup relations.     

Effects of Trait Self‐Control on Response Conflict About Healthy and Unhealthy Food

Self‐control leads to positive life outcomes, but it is poorly understood. While previous research has focused on self‐control failure, self‐control success remains unexplored. The current studies aim to shed more light on the mechanisms of self‐control by focusing on the resolution of response conflict as a key component in self‐control success. Trait self‐control was measured, and participants reported on the magnitude of response conflict they experienced about healthy and unhealthy foods in Study 1 (N = 146; M_age = 33.03; 59 females, 83 males, 4 unknown). The response conflict process was assessed in Study 2 (N = 118; M_age = 21.45; 68 females, 41 males, 9 unknown). Outcomes showed that self‐reported evaluative response conflict about food items was smaller for people high in trait self‐control. Study 2 revealed that higher trait self‐control predicted faster resolution of self‐control conflict, and an earlier peak of the response conflict. Taken together, these results provide insight into what makes people with high trait self‐control successful, namely, how they handle response conflict. Implications for self‐control theories and future directions are discussed.     

The dark triad: Facilitating a short‐term mating strategy in men

This survey (N = 224) found that characteristics collectively known as the Dark Triad (i.e. narcissism, psychopathy and Machiavellianism) were correlated with various dimensions of short‐term mating but not long‐term mating. The link between the Dark Triad and short‐term mating was stronger for men than for women. The Dark Triad partially mediated the sex difference in short‐term mating behaviour. Findings are consistent with a view that the Dark Triad facilitates an exploitative, short‐term mating strategy in men. Possible implications, including that Dark Triad traits represent a bundle of individual differences that promote a reproductively adaptive strategy are discussed. Findings are discussed in the broad context of how an evolutionary approach to personality psychology can enhance our understanding of individual differences. Copyright © 2008 John Wiley & Sons, Ltd.