Beauty affects fairness: facial attractiveness alters neural responses to unfairness in the ultimatum game
Beauty affects fairness: facial attractiveness alters neural responses to unfairness in the ultimatum game
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DOI：
10.1007/s11682-022-00705-x
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发表时间：
2022-07-12
影响因子：
3.2
通讯作者：
Rao, Hengyi
中科院分区：
文献类型：
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作者：
Pan, Yu;Jin, Jia;Rao, Hengyi
人脸包含着丰富的社会信息，而面部吸引力是影响社会决策的一个关键因素。先前的研究表明，在最后通牒游戏（UG）中，人类玩家不太可能拒绝具有高面部吸引力的提议者的不公平提议。然而，这种美容溢价效应背后的神经机制仍不清楚。在这项研究中，我们使用功能性磁共振成像（fMRI），并检查了面部吸引力对大脑反应的影响，公平和不公平的报价在UG。行为数据显示，受试者总体上倾向于拒绝各种条件下的不公平提议，但更有可能接受面部吸引力较高的提议者的不公平提议，而不是面部吸引力较低的提议者。成像数据显示，不公平的报价诱导更大的活动，在前额叶皮层和内侧前额叶皮层（MePFC）相比，在公平的条件下，高和低的面部吸引力的提案人。此外，不公平提议的接受率与高面部吸引力提议者的MePFC活动呈正相关，与低面部吸引力提议者的前额叶活动呈负相关。这些发现表明，面部吸引力通过改变情感和认知动机在社会交往中的作用来调节大脑对不公平的反应。
Human faces consist of rich information for social interactions and facial attractiveness is a key dimension affecting social decisions. Previous studies have indicated that human players are less likely to refuse an unfair offer from proposers with high facial attractiveness in the Ultimatum Game (UG). However, the neural mechanisms underlying such beauty premium effect remain unclear. In this study, we used functional magnetic resonance imaging (fMRI) and examined the effects of facial attractiveness on brain responses to fair and unfair offers in the UG. Behavioral data showed that subjects were overall prone to refuse unfair offers across conditions but were more likely to accept unfair offers from higher facial attractive proposers than those from lower facial attractive proposers. Imaging data showed that unfair offers induced greater activity in the anterior insula and medial prefrontal cortex (MePFC) compared to those in fair offers condition for both high and low facial attractive proposers. Moreover, the acceptance rate of unfair offers positively correlated with the MePFC activity for high facial attractive proposers and negatively correlated with the anterior insula activity for low facial attractive proposers. These findings suggest that facial attractiveness modulates brain responses to unfairness through altering the roles of emotion and cognitive motivation in social interactions.