著者

梅谷 凌平 後藤 晶 岡田 勇 山本 仁志

出版者

日本社会心理学会

雑誌

社会心理学研究 (ISSN:09161503)

巻号頁・発行日

vol.36, no.2, pp.31-38, 2020-11-30 (Released:2020-11-30)

参考文献数

58

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Upstream reciprocity refers to a person who has received help helping a third person instead of the person who helped him/her. It is observed widely but lacks a theory explaining its mechanism. Theory suggests that upstream reciprocity cannot maintain stable cooperation. Here we examine the possibility that the strength of a belief in a just world, which is a cognitive bias, drives upstream reciprocity. We test the effects on upstream reciprocity of a belief in a just world by conducting an upstream reciprocity game based on a trust game. The results demonstrate that upstream reciprocity is explained by a belief in immanent justice, a subconcept of a belief in a just world. These results shed light on a mechanism that explains why upstream reciprocity is observed in the real world.