![]() ![]() Emotional and sexual jealousy as a function of sex and sexual orientation in a Brazilian sample. Infidelity, jealousy, and wife abuse among Tsimane forager–farmers: testing evolutionary hypotheses of marital conflict. Partner preferences in the context of concurrency: what Himba want in formal and informal partners. Paternal investment and the positive effects of fathers among the matrilineal Mosuo of southwest China. Evolutionary origins of sex differences in jealousy? Questioning the “fitness” of the model. ![]() Jealousy and the nature of beliefs about infidelity: tests of competing hypotheses about sex differences in the United States, Korea, and Japan. Evolution and proximate expression of human paternal investment. Sex ratio effects on reproductive strategies in humans. Sexual jealousy as a facultative trait: evidence from the pattern of sex differences in adults from China and the United States. Cross-cultural differences in the elicitation of sexual jealousy. Jealousy in a small-scale, natural fertility population: the roles of paternity, investment and love in jealous response. Symons, D The Evolution of Human Sexuality. Sperm competition and its evolutionary consequences in the insects. Mate guarding, male attractiveness, and paternity under social monogamy. ![]() Postinsemination associations between males and females in insects: the mate-guarding hypothesis. Choosy but not chaste: multiple mating in human females. Extramarital sex norms in cross-cultural perspective. Causes of conjugal dissolution: a cross-cultural study. Evolutionary history of hunter–gatherer marriage practices. Sex differences in jealousy: a 25-year retrospective. Sex differences in jealousy: a meta-analytic examination. Sexual and emotional infidelity: evolved gender differences in jealousy prove robust and replicable. Sex differences in jealousy: evolution, physiology, and psychology. Thus, partner jealousy appears to be a facultative response, reflective of the variable risks and costs of men’s investment across societies.īuss, D. We find that greater paternal investment and lower frequency of extramarital sex are associated with more severe jealous response. Using parental investment theory, we derived several predictions about what might trigger such variation. However, we also show substantial variation in jealous response across populations. In line with previous work, we find a robust sex difference in the classic forced-choice jealousy task. To better understand variation in jealous response, we conducted a 2-part study in 11 populations (1,048 individuals). This stems in part from the predominance of studies using student samples from industrialized populations, which represent a relatively homogenous group in terms of age, life history stage and social norms 3, 4. Jealous response to the threat of infidelity is well studied, but most empirical work on the topic has focused on a proposed sex difference in the type of jealousy (sexual or emotional) that men and women find most upsetting, rather than on how jealous response varies 1, 2. Long-lasting, romantic partnerships are a universal feature of human societies, but almost as ubiquitous is the risk of instability when one partner strays. ![]()
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