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42 ReferencesSocial exchange and solidarity: in-group love or out-group hate?
Abstract
Men exhibit a stronger tendency to favor the in-group over the out-group than women. We examined if this male-specific "coalitional psychology" represents in-group love or out-group hatred. One hundred thirty-three college freshmen played a Prisoner's Dilemma Game with a member of their own group and a member of another group. Both groups consisted of same sex participants. An in-group bias -- cooperation at a higher level with the in-group than the out-group -- based on expectations of cooperation from the in-group was observed for both men and women. When such expectations were experimentally eliminated, women did not show any in-group bias whereas men still exhibited an in-group bias. The male-specific in-group bias in this condition was found to be a product of intra-group cooperation rather than inter-group competition. These findings suggest that the male-specific coalitional psychology catered more toward within-group solidarity than promotion of aggression against the out-group.
Project
The purpose of this project is to elucidate the psychological mechanism of aggressive behavior toward outgroup members. Currently, I have done some experiments using preemptive strike game in minim…" [more]
Article
Two explanations of why shared group membership promotes cooperation in social dilemmas were compared. According to the fear-greed model of social identity proposed by Simpson (2006), shared group membership reduces greed but not fear and, thus, should promote altruistic behavior toward in-group members in the absence of fear. According to the group heuristic model proposed by Yamagishi and... [Show full abstract]
Article
Japanese (N = 48) and New Zealander (N = 55) participants were first assigned to one of two minimal groups, and then played a prisoner's dilemma game twice with an ingroup member and twice with an outgroup member. In one of the two games they played with an ingroup (or outgroup) member, participants and their partner knew one another's group memberships (mutual-knowledge condition). In the... [Show full abstract]
Article
To test the hypothesis that sensitivity to monitoring drives people to act altruistically toward members of their own community, two experiments investigated whether an eye-like painting promotes altruism toward in-group members, but not toward out-group members. Participants played the role of dictator in a dictator game with another participant (a recipient) who was from the minimal in-group... [Show full abstract]
Article
We tested the reputation maintenance hypothesis of ingroup favoritism. Ninety-two non-student participants played one-shot prisoner's dilemma games with an ingroup and an outgroup partner with minimal groups, and showed ingroup favoritism only when the participant and his/her partner knew each other's group membership (common knowledge condition). The ingroup favoritism observed in the common... [Show full abstract]
Chapter
Humans think, communicate, and behave to adapt to a particular social ecology, and by doing so they collectively create, maintain, and change the very ecology (i.e., social niche) they adapt to. The niche construction approach to culture analyzes how people induce each other to think and behave in particular ways by behaving in particular ways themselves. The best support to this approach is... [Show full abstract]
















