Abstract
In this study, we examined how jealousy responses in men and women were affected by 2D:4D digit ratio, a correlate of prenatal testosterone exposure, and actual infidelity experiences using the forced-choice paradigm. Extending the previous literature on responses to infidelity, we examined whether specific types of infidelity and whether active manipulation of memories of actual infidelity experiences affected jealousy responses. We were able to replicate the predicted sex differences in jealousy responses in a sample of heterosexual Norwegian students with committed relationship experiences (N = 480). Further, we found that 2D:4D ratio was negatively associated with sexual jealousy, but as predicted, this effect was fully accounted for by sex of respondent. Men reported more sexual jealousy than women regardless of experiencing actual infidelity and regardless of infidelity type. Actual infidelity experiences produced more pronounced sex-typical differences when memories of these were activated through question order manipulation. Suggestions for future studies on jealousy responses to infidelity experiences are made.
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