Sexual arousal and the pursuit of attractive mating opportunities

From an evolutionary perspective, sexual arousal may function, in part, to motivate the pursuit of attractive mating opportunities. We designed a study to test three aspects of this hypothesis. Several hundred heterosexual men and women completed a short survey about sexual arousal in response to a casual sex mating opportunity. We replicated previous research documenting that men report greater sexual arousal than women in response to a short-term mating opportunity. We argue that it is unlikely that a “downplaying of alternatives” psychology evolved, whereby mated individuals rate opposite-sex targets as less attractive than do unmated individuals, but instead that men and women have a relationship-seeking psychology, motivating them to pursue attractive mating opportunities. The results supported this relationship-seeking psychology rather than a downplaying alternatives psychology. Discussion addresses directions for future research on the motivational properties of sexual arousal.     

Personality and self-esteem in newlyweds

The current study investigated the relationships between several dimensions of self-esteem and the “Big Five” personality dimensions. Using a sample of 107 newlywed couples, we investigated whether the relationships identified in previous research replicated in this novel sample and whether the relationships between different dimensions of self-esteem (general, physical, social, and intellectual) and standings on the Big Five personality dimensions might be sex-differentiated. The results replicate many of the relationships between different dimensions of self-esteem and standings on the Big Five personality dimensions for both men and women. Previous work indicates that differences in personality between men and women may shape interactions with the environment differently and these different interactions may then shape self-esteem. None of these relationships was reliably sex-differentiated in the current research. Discussion addresses several limitations of this research and highlights directions for future research on the personality-self-esteem interface.     

Adaptation to Sperm Competition in Humans

ABSTRACT— With the recognition, afforded by recent evolutionary science, that female infidelity was a recurrent feature of modern humans' evolutionary history has come the development of a unique area in the study of human mating: sperm competition. A form of male–male postcopulatory competition, sperm competition occurs when the sperm of two or more males concurrently occupy the reproductive tract of a female and compete to fertilize her ova. Males must compete for mates, but if two or more males have copulated with a female within a sufficiently short period of time, sperm will compete for fertilizations. Psychological, behavioral, physiological, and anatomical evidence indicates that men have evolved solutions to combat the adaptive problem of sperm competition, but research has only just begun to uncover these adaptations.     

Modern application of evolutionary theory to psychology: key concepts and clarifications

Darwinian selection has become the centerpiece of biology, and in the past few decades many psychologists and anthropologists have recognized the value of using an evolutionary perspective to guide their work. With a focus on evolved psychological mechanisms and associated information processing features, evolutionary psychology has risen as a compelling and fruitful approach to the study of human psychology and behavior. In this article we review the instrument of evolution: natural selection, the products of evolution, and the impact of evolutionary thinking on modern psychological science. We conclude that as prejudicial barriers are overcome, as more evolutionary psychological work is conducted, and as hypothesized psychological mechanisms are substantiated in other disciplines, evolutionary psychology will emerge as the metatheory for psychology.     

Emotional reactions to infidelity

We sought to identify emotional reactions to a partner's sexual infidelity and emotional infidelity. In a preliminary study, 53 participants nominated emotional reactions to a partner's sexual and emotional infidelity. In a second study, 655 participants rated each emotion for how likely it was to occur following sexual and emotional infidelity. Principal components analysis revealed 15 emotion components, including Hostile/Vengeful, Depressed, and Sexually aroused. We conducted repeated measures analyses of variance on the 15 components, with participant sex as the between-subjects factor and infidelity type as the within-subjects factor. A main effect for sex obtained for 9 components. For example, men scored higher on Homicidal/Suicidal, whereas women scored higher on Undesirable/Insecure. A main effect for infidelity type obtained for 12 components. For example, participants endorsed Nauseated/Repulsed as more likely to follow sexual infidelity and Undesirable/Insecure as more likely to follow emotional infidelity. Discussion addresses limitations of this research, and highlights the need for an integrative theory of emotional reactions to infidelity.     

Forgiveness or breakup: Sex differences in responses to a partner's infidelity

Infidelities--sexual, emotional, or both--afflict many long-term romantic relationships. When a person discovers a partner's betrayal, a major decision faced is to forgive the partner and remain together or to terminate the relationship. Because men and women have confronted different adaptive problems over evolutionary history associated with different forms of infidelity, we hypothesised the existence of sex differences in which aspects of infidelity would affect the likelihood of forgiveness or breakup. We tested this hypothesis using forced-choice dilemmas in which participants (N = 256) indicated how difficult it would be to forgive the partner and how likely they would be to break up with the partner, depending on the nature of the infidelity. Results support the hypothesis that men, relative to women: (a) find it more difficult to forgive a sexual infidelity than an emotional infidelity; and (b) are more likely to terminate a current relationship following a partner's sexual infidelity than an emotional infidelity. The Discussion provides directions for future work on the determinants of breakup and the psychology of forgiveness.     

BRIEF REPORT Interpretation of death‐relevant ambiguous stimuli as a function of death threat

According to G.A. Kelly's (1955) Personal Construct Theory, people are threatened by personal death to the extent that their conceptions of death are inconsistent with their conceptions of their present selves. As an individual difference factor, death threat predicts how people respond to death‐relevant situations and stimuli. To test the hypothesis that high death‐threat (relative to low death‐threat) persons will engage in greater denial when assigning meaning to ambiguous stimuli, college students viewed inkblots and chose between a nondeath‐relevant interpretation and a death‐relevant interpretation. As hypothesised, high death‐threat participants endorsed fewer death‐relevant interpretations than did low death‐threat participants. Self‐reported conscious fear of death did not predict this avoidance. Results are discussed in the light of historical and current work on psychological responses to death.