Competing with peers: Mentalizing-related brain activity reflects what is at stake
Competing with peers: Mentalizing-related brain activity reflects what is at stake
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DOI：
10.1016/j.neuroimage.2009.01.063
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发表时间：
2009-06-01
期刊：
影响因子：
5.7
通讯作者：
Schuermann, Martin
中科院分区：
文献类型：
--
作者：
Halko, Marja-Liisa;Hlushchuk, Yevhen;Schuermann, Martin
竞争对做决定的人施加了限制。与此同时，人们不仅追求个人利益最大化，而且还试图惩罚不公平的同类。在讨价还价游戏中，受试者通常会接受同等份额的出价，但拒绝过小的出价;竞争会影响这种平衡。在这里，我们使用功能性磁共振成像（fMRI）来研究在讨价还价游戏中对竞争的适应，在这个游戏中，受试者与另一个人竞争股份。对于中等规模的企业，而不是最低报价，竞争增加了接受的可能性，从而使行为转向最大化个人利润，强调了财务激励的重要性。特别是对于中等规模的报价，竞争与颞顶交界处的双边大脑激活增加有关，这是一个与心智化有关的区域。在右下额区，在标准最后通牒游戏中接受率高暗示以利润为导向的受试者中，与竞争相关的大脑激活最强。研究结果表明，当竞争对手的行为难以预测，而赌注的吸引力足以证明努力的合理性时，大脑区域的网络支持竞争下的决策，并参与激励依赖的心理化。(C)2009 Elsevier Inc. All rights reserved.
Competition imposes constraints for humans who make decisions. Concomitantly, people do not only maximize their personal profit but they also try to punish unfair conspecifics. In bargaining games, subjects typically accept equal-share offers but reject unduly small offers; competition affects this balance. Here we used functional magnetic resonance imaging (fMRI) to study adjustment to competition in a bargaining game where subjects competed against another person for a share of the stake. For medium-sized, but not for minimum offers, competition increased the likelihood of acceptance and thus shifted behavior towards maximizing personal profits, emphasizing the importance of financial incentives. Specifically for medium-sized offers, competition was associated with increased brain activation bilaterally in the temporo-parietal junction, a region associated with mentalizing. In the right inferior frontal region, competition-related brain activation was strongest in subjects whose high acceptance rates in the standard ultimatum game hinted at a profit-oriented approach. The results suggest a network of brain areas supporting decision making under competition, with incentive-dependent mentalizing engaged when the competitor's behavior is difficult to predict and when the stake is attractive enough to justify the effort. (C) 2009 Elsevier Inc. All rights reserved.