Modulating the Activity of vmPFC Regulates Informational Social Conformity: A tDCS Study.

Modulating the Activity of vmPFC Regulates Informational Social Conformity: A tDCS Study.
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调节 vmPFC 的活动调节信息社会一致性:一项 tDCS 研究

DOI:
10.3389/fpsyg.2020.566977
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发表时间:
2020
影响因子:
3.8
通讯作者:
Luo J
Luo J
中科院分区:
心理学3区
文献类型:
--
作者:
Li Y;Wang J;Ye H;Luo J

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人们在许多不同的背景下对社会一致性进行了评估,从心理学中的情绪传染,到经济学中的投机性事件,再到关于政治的大规模抗议活动。以往的神经科学研究表明,腹内侧前额叶皮质(VmPFC)参与社会从众,尤其是在价值整合过程中,但vmPFC的具体机制尚不清楚。在这项研究中,我们旨在通过经颅直流电刺激(TDC)来确定vmPFC和从众倾向之间的直接联系。从众倾向是通过参与者在观察到大多数人的反应时改变决定的概率来衡量的。在我们的实验中,被试在每个实验中可以做出两个决定,一次没有社会信息,一次有社会信息,这使得我们可以直观地观察到被试在不同条件下的从众倾向。我们发现,当参与者的初始决定与大多数人的意见不同时,对vmPFC的阴极刺激显著增加了从众倾向,并减少了反应时间。基于实验结果,我们的研究表明,vmPFC主要抑制和调节信息整合行为。这些发现补充了对从众行为的神经机制和vmPFC在从众行为背后的神经回路中的作用的研究。
Social conformity has been evaluated in many different contexts, ranging from an emotional contagion in psychology, to speculative episodes in economics, to mass protests concerning politics. Previous neuroscience studies suggest that the ventromedial prefrontal cortex (vmPFC) participates in social conformity, especially when it comes to the value integration process, but the specific mechanism of vmPFC is still unclear. In this study, we aimed to identify a direct link between the vmPFC and conformity tendencies by means of transcranial direct current stimulation (tDCS). Conformity tendencies are measured by the probability that participants change their decisions when they observe the majority responses. In our experiment, subjects could make two decisions in each trial, once without social information and once with social information, which allowed us to directly observe the conformity tendency of subjects in different conditions. We found that cathodal stimulation of the vmPFC significantly increased conformity tendency and decreased response time when the initial decision of participants differs from the majority opinion. Based on the experimental results, our study suggests that the vmPFC mainly inhibits and regulates the informational conformity behavior. These findings complement investigations of the neural mechanism of conformity and the role of the vmPFC in the neural circuit behind conformity behavior.
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