ANTERIOR INSULA SIGNALS INEQUALITIES IN A MODIFIED ULTIMATUM GAME
ANTERIOR INSULA SIGNALS INEQUALITIES IN A MODIFIED ULTIMATUM GAME
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前岛叶在改良的最后通牒游戏中发出不平等信号
DOI：
10.1016/j.neuroscience.2017.02.023
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发表时间：
2017-04-21
期刊：
影响因子：
3.3
通讯作者：
Yang, Guang
中科院分区：
文献类型：
--
作者：
Cheng, Xuemei;Zheng, Li;Yang, Guang
研究采用最后通牒游戏（UG），其中涉及两个当事人（即，提议者和响应者）分割一些钱已经提出了前额叶（A1）在检测公平规范违反中所起的作用，即，违反了响应者对从提议者那里获得相等分裂的期望。在这项研究中，我们探讨了当同时存在另一种被平等对待的期望时，Al会如何反应。参与者作为响应者，将被告知他们收到的报价以及同一提议者向其他人提供的平均金额。因此，我们引入了不同的条件，其中参与者被等同或不等同于UG中的其他应答者。参与者可以决定接受或拒绝提议，接受会导致建议的分裂，拒绝会使双方一无所获。行为结果表明，参与者拒绝更多的不公平的报价，并在接受（与拒绝）的报价时，他们提供的比别人更慢的反应。在神经水平上，当参与者收到相对于公平的不公平报价时，以及当他们收到相对于平等报价的不平等报价时，观察到更强的Al激活。此外，背内侧前额叶皮层/背侧前扣带皮层（dmPFC/dACC）表现出更大的活动，在接受不平等（与平等）的报价，并在接受（与拒绝）的报价，这是小于别人的。两者合计，本研究表明，他人的治疗调制的行为反应不公平和神经相关的公平相关的决策过程中，和铝发挥了一般的作用，在检测规范违反。(C)2017年IBRO。由爱思唯尔有限公司出版。保留所有权利。
Studies employing the Ultimatum Game (UG) which involves two parties (i.e., proposers and responders) splitting some money have suggested the role that anterior insula (Al) plays in detecting fairness norm violation, i.e., violation of the responder's expectation of receiving equal splits from the proposer. In this study, we explored how Al would respond when there existed simultaneously another expectation of being treated equivalently as others. Participants acted as responders and would be informed about both the offers they received and the average amount of money the same proposer offered to others. Hence we introduced different conditions where participants were treated equivalently or not equivalently as other responders in UG. Participants could decide to accept or reject the offer with acceptance leading to the suggested split and rejection leaving both parties nothing. Behavioral results showed that participants rejected more unfair offers and reacted more slowly during acceptance (vs. rejection) of offers when they were offered less than others. At the neural level, stronger Al activation was observed when participants received unfair relative to fair offers, as well as when they received unequal relative to equal offers. Moreover, dorsomedial prefrontal cortex/dorsal anterior cingulate cortex (dmPFC/dACC) exhibited greater activity during receiving unequal (vs. equal) offers and during acceptance (vs. rejection) of offers which were less than others'. Taken together, the present study demonstrated that the treatment of others modulated both behavioral responses to unfairness and neural correlates of the fairness-related decision-making process, and that Al played a general role in detecting norm violations. (C) 2017 IBRO. Published by Elsevier Ltd. All rights reserved.