Kostic Bogdan, Yadon Carly A
Department of Psychology, Missouri State University, Springfield, MO, USA.
Evol Psychol. 2014 Jul 12;12(4):687-705. doi: 10.1177/147470491401200402.
The current study explored people's perceptions of how they would feel if their partners cheated on them by having sex with their relatives, such as if a man's wife had sex with his brother. Kin selection theory suggests that in such situations, victims of infidelity might feel slightly better if their partners had sex with biological relatives (compared to sex with nonrelatives) because some of the victims' genes could still get passed on through their relatives. In two experiments, participants reported how they would feel in various scenarios involving their partners having sex with participants' relatives and nonrelatives. As expected, participants generally reported being very disapproving of a partner's hypothetical infidelity with both their relatives and nonrelatives. However, contrary to predictions generated by kin selection theory, participants tended to report that they would feel worse if their partners had sex with their relatives. We propose several explanations for the current findings and discuss their implications for kin selection theory.
当前的研究探讨了人们对于如果伴侣与自己的亲属发生性行为（比如一个男人的妻子与他的兄弟发生性行为）而背叛自己时会有何感受的看法。亲缘选择理论认为，在这种情况下，不忠行为的受害者可能会感觉稍微好一些，如果他们的伴侣是与有血缘关系的亲属发生性行为（相比于与无血缘关系的人发生性行为），因为一些受害者的基因仍可通过其亲属得以传承。在两项实验中，参与者报告了在各种涉及伴侣与参与者的亲属及非亲属发生性行为的情景下他们的感受。不出所料，参与者普遍表示非常不赞同伴侣与亲属及非亲属的假想不忠行为。然而，与亲缘选择理论所产生的预测相反，参与者倾向于报告如果他们的伴侣与他们的亲属发生性行为，他们会感觉更糟。我们针对当前的研究结果提出了几种解释，并讨论了其对亲缘选择理论的影响。
