Original article:

Explaining sex differences in reactions to relationship infidelities: Comparisons of the roles of sex, gender, beliefs, attachment, and sociosexual orientation

Evolutionary Psychology 12(1): 73-96 Gary L. Brase, Department of Psychology, Kansas State University, Manhattan, KS, USA, gbrase@ksu.eduLora Adair, Department of Psychology, Kansas State University, Manhattan, KS, USAKale Monk, Department of Family Studies, Kansas State University, Manhattan, KS, USA


To the extent that sex differences are mediated by mechanisms such as sex-roles and beliefs, individual differences in these more proximate traits should account for significant portions of relevant sex differences. Differences between women and men in reactions to sexual and emotional infidelity were assessed in a large sample of participants (n = 477), and these target reactions were evaluated as a function of many potential proximate mediators (infidelity implications beliefs, gender-role beliefs, interpersonal trust, attachment style, sociosexuality, and culture of honor beliefs) and as a function of participant sex. Results found a consistent sex difference that was not mediated by any other variables, although a handful of other variables were related to male, but not female, individual differences. These findings suggest particularly promising directions for future research on integrating evolutionarily based sex differences and proximate individual differences.


jealousy, sex differences, gender roles, infidelity, attachment, sociosexuality, culture of honor

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Evolutionary Psychology - An open access peer-reviewed journal - ISSN 1474-7049 © Ian Pitchford and Robert M. Young; individual articles © the author(s)

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