A large amount of evidence indicates that group identity influences social interactions and, in particular, economic decisions. In this article, we test the hypothesis that group identity triggers social norms or heuristics, using reaction times collected in a series of simple distributive tasks (minidictator games). We control for individual preferences using the degree of selfishness expressed in the allocation decisions, and we account for variations in the difficulty of making decisions based on subjects’ prosocial inclination. Our results support the heuristic hypothesis: Generosity seems to be an effect of “fast and frugal” behavioral rules that simplify decisions, especially when it conflicts with an underlying tendency to behave in a self-interested manner. In the language of “dual-process” theories, group identity triggers System 1 processes that facilitate choice and override slow, calculative decision-making.

中文翻译：

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作为社会启发式的群体身份：反应时间实验。

大量证据表明，群体认同会影响社会互动，尤其是经济决策。在本文中，我们使用在一系列简单的分配任务（minidictator 游戏）中收集的反应时间来检验群体身份触发社会规范或启发式的假设。我们使用分配决策中表达的自私程度来控制个人偏好，并且我们考虑了基于受试者的亲社会倾向做出决策的难度的变化。我们的结果支持启发式假设：慷慨似乎是简化决策的“快速和节俭”行为规则的结果，尤其是当它与以自利方式行事的潜在倾向相冲突时。用“双进程”理论的语言来说，