摘要
＂信任他人或者不信任他人？＂是社会互动中经常面临一种行为决择,直接影响着个体的社会生活。作为一种重要的社会信号机制,信任是建立良好社会关系的基石,它能够降低社会交易成本,易化合作行为。为了探究个体在信任互动情境下大脑活动变化的时间动态特征,采用事件相关电位技术记录了20名健康被试（充当信任者）完成重复性信任博弈任务（repeated Trust Game,r TG）时的脑电成分。行为结果发现个体选择信任的比例显著高于几率水平。电生理学结果表明,决策阶段中不信任选择比信任选择诱发了更正的P2成分（150~250 ms）,差异波溯源分析定位于额中回（middle frontal gyrus,BA 46）和额下回（inferior frontal gyrus,BA 46）。反馈阶段中损失反馈比获益反馈诱发了更负的FRN成分（200~300 ms）,而获益反馈比损失反馈诱发了更短的P300潜伏期。本研究为理解人类信任博弈过程的动态加工时程提供了初步的神经电生理学证据。
To trust or not to trust is a social dilemma which impacts our way of life. As an important social signaling mechanism, trust is critical to the development of long-term social relationships, which could reduce transaction costs, facilitate cooperative behavior, and promote the prosperity of human society. Previous f MRI research based on the Trust Game has revealed some brain regions recruited for the decision to trust, including medial prefrontal cortex, dorsolateral prefrontal cortex and right temporoparietal junction. However, the temporal characteristics of the trustor＇s decision-making and outcome evaluation during the Trust Game are still unclear. We aim to address this limitation and understand the cognitive and biological mechanisms underlying decisions to trust. In the current study, we employed the event-related potentials（ERPs） technology to record 20 healthy participants＇ electrical brain activity while they played the role of trustor in a repeated Trust Game. During this game, participants made decisions to trust or not to trust a same counterpart over 150 trials. The counterpart＇s reciprocation strategy was manipulated by the experimenter（50% reinforcement rate）. Participants were provided with post-decision feedback about the outcome of their decisions（gain or loss game points） in each trial. The behavioral data and ERP component in the decision phase and the outcome evaluation phase were analyzed. Behavioral results revealed that participants made trusting decisions more often than chance. Electrophysiological results found that the peak amplitudes of P2 for distrusting choice were significantly larger than trusting choice in the decision phase. The neural activity in the P2 time window that differentiated between distrusting and trusting choices was potentially generated in the middle frontal gyrus and the inferior frontal gyrus. In the outcome phase, the feedback-related negativity（FRN） was more negative going in response to loss feedback compared to gain feedback, while P
出处
《心理学报》
CSSCI
CSCD
北大核心
2015年第8期1028-1038,共11页
Acta Psychologica Sinica
基金
国家自然科学基金(31371045)
新世纪优秀人才支持计划(NCET-11-1065)
教育部人文社科研究基地重大项目(12JJD190004)
天津市三年千人和中青年骨干创新人才培养计划资助
关键词
信任博弈
决策过程
结果评价
P2
FRN
P300
Trust game
decision-making
outcome evaluation
P2
feedback related negativity
P300
