Mating interest improves women's accuracy in judging male sexual orientation.

People can accurately infer others' traits and group memberships across several domains. We examined heterosexual women's accuracy in judging male sexual orientation across the fertility cycle (Study 1) and found that women's accuracy was significantly greater the nearer they were to peak ovulation. In contrast, women's accuracy was not related to their fertility when they judged the sexual orientations of other women (Study 2). Increased sexual interest brought about by the increased likelihood of conception near ovulation may therefore influence women's sensitivity to male sexual orientation. To test this hypothesis, we manipulated women's interest in mating using an unobtrusive priming task (Study 3). Women primed with romantic thoughts showed significantly greater accuracy in their categorizations of male sexual orientation (but not female sexual orientation) compared with women who were not primed. The accuracy of judgments of male sexual orientation therefore appears to be influenced by both natural variations in female perceivers' fertility and experimentally manipulated cognitive frames.

Found in translation: cross-cultural consensus in the accurate categorization of male sexual orientation.

Across cultures, people converge in some behaviors and diverge in others. As little is known about the accuracy of judgments across cultures outside of the domain of emotion recognition, the present study investigated the influence of culture in another area: the social categorization of men's sexual orientations. Participants from nations varying in their acceptance of homosexuality (United States, Japan, and Spain) categorized the faces of men from all three cultures significantly better than chance guessing. Moreover, categorizations of individual faces were significantly correlated among the three groups of perceivers. Americans were significantly faster and more accurate than the Japanese and Spanish perceivers. Categorization strategies (i.e., response bias) also varied such that perceivers from cultures less accepting of homosexuality were more likely to categorize targets as straight. Male sexual orientation therefore appears to be legible across cultures.