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The development of ingroup favoritism in repeated social dilemmas.

摘要:

In two comprehensive and fully incentivized studies, we investigate the development of ingroup favoritism as one of two aspects of parochial altruism in repeated social dilemmas. Specifically, we test whether ingroup favoritism is a fixed phenomenon that can be observed from the very beginning and remains stable over time, or whether it develops (increases vs. decreases) during repeated contact. Ingroup favoritism is assessed through cooperation behavior in a repeated continuous prisoner's dilemma where participants sequentially interact with 10 members of the ingroup (own city and university) and subsequently with 10 members of the outgroup (other city and university), or vice versa. In none of the experiments do we observe initial differences in cooperation behavior for interaction partners from the ingroup, as compared to outgroup, and we only observe small differences in expectations regarding the interaction partners' cooperation behavior. After repeated interaction, however, including a change of groups, clear ingroup favoritism can be observed. Instead of being due to gradual and potentially biased updating of expectations, we found that these emerging differences were mainly driven by the change of interaction partners' group membership that occurred after round 10. This indicates that in social dilemma settings ingroup favoritism is to some degree dynamic in that it is enhanced and sometimes only observable if group membership is activated by thinking about both the interaction with the ingroup and the outgroup.

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作者单位: Department of Psychology, Max Planck Institute for Research on Collective Goods Bonn, Germany ; Department of Social Psychology, University of Siegen Siegen, Germany. [1] Department of Psychology, Max Planck Institute for Research on Collective Goods Bonn, Germany ; Department of Psychology, University of Göttingen Göttingen, Germany. [2] Department of Psychology, Max Planck Institute for Research on Collective Goods Bonn, Germany. [3] Faculty of Psychology, University of Koblenz-Landau Landau, Germany. [4]
DOI: 10.3389/fpsyg.2015.00476
发布时间: 2018-10-18
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