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群体/群体外成员身份调节公平性考虑：来自 ERP 和 EEG 振荡的神经特征。

Ingroup/outgroup membership modulates fairness consideration: neural signatures from ERPs and EEG oscillations.

机构信息

School of Humanities and Social Sciences, Institute of Psychological and Cognitive Sciences, Fuzhou University, Fuzhou, 350116, China.

Institute of Developmental Psychology, Beijing Normal University, 100875, China.

出版信息

Sci Rep. 2017 Jan 4;7:39827. doi: 10.1038/srep39827.

DOI:10.1038/srep39827
PMID:28051156
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5209655/
Abstract

Previous studies have shown that ingroup/outgroup membership influences individual's fairness considerations. However, it is not clear yet how group membership influences brain activity when a recipient evaluates the fairness of asset distribution. In this study, subjects participated as recipients in an Ultimatum Game with alleged members of both an experimentally induced ingroup and outgroup. They either received extremely unequal, moderately unequal, or equal offers from proposers while electroencephalogram was recorded. Behavioral results showed that the acceptance rates for unequal offers were higher when interacting with ingroup partners than with outgroup partners. Analyses of event related potentials revealed that proposers' group membership modulated offer evaluation at earlier processing stages. Feedback-related negativity was more negative for extremely and moderately unequal offers compared to equal offers in the ingroup interaction whereas it did not show differential responses to different offers in the outgroup interaction. Analyses of event related oscillations revealed that the theta power (4-6 Hz) was larger for moderately unequal offers than equal offers in the ingroup interaction whereas it did not show differential responses to different offers in the outgroup interaction. Thus, early mechanisms of fairness evaluation are strongly modulated by the ingroup/outgroup membership of the interaction partner.

摘要

先前的研究表明，内群体/外群体成员身份会影响个体的公平考虑。然而，目前尚不清楚当接受者评估资产分配的公平性时，群体成员身份如何影响大脑活动。在这项研究中，被试作为接受者参与了一个与假设的内群体和外群体成员的最后通牒博弈。在记录脑电图的同时，他们从提议者那里收到了非常不平等、中等不平等或平等的提议。行为结果表明，与内群体伙伴互动时，不平等提议的接受率更高。事件相关电位分析表明，提议者的群体成员身份调节了早期处理阶段的提议评估。与内群体互动中的平等提议相比，反馈相关负波对于非常不平等和中等不平等的提议更为负向，而在外群体互动中，它对不同的提议没有表现出不同的反应。事件相关振荡分析表明，在内群体互动中，中等不平等的提议比平等提议的θ功率（4-6 Hz）更大，而在外群体互动中，不同的提议没有表现出不同的反应。因此，公平评估的早期机制受到交互伙伴的内群体/外群体成员身份的强烈调节。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/c52a043f3618/srep39827-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/bdc77a4dda15/srep39827-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/60bd48aa565a/srep39827-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/240d08be061d/srep39827-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/b43b070ca42f/srep39827-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/c52a043f3618/srep39827-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/bdc77a4dda15/srep39827-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/60bd48aa565a/srep39827-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/240d08be061d/srep39827-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/b43b070ca42f/srep39827-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3bbf/5209655/c52a043f3618/srep39827-f5.jpg

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