Corruption behavior has gained worldwide concern for its great harmfulness to public society. In order to reduce corruption, researchers have carried out numerous studies on corrupt prevention. Researchers found that except for external supervision, the internal factor such as moral judgment also have an impact on corruption behavior. Previous brain imaging and stimulation studies suggested that dorsolateral prefrontal cortex (DLPFC) is critical brain area which integrates emotional and cognitive process of moral judgments. Therefore, in the current study, we applied tDCS (transcranial direct current stimulation) over DLPFC to investigated the modulation effect of cortical excitability on corruption behavior. According to the characteristics of corruption, we designed an incomplete information invest game task based on trust game, then adopted a between-subject design to compare participants' corruption rate and reaction time (RT) among right anodal/left cathodal, left anodal/right cathodal and sham tDCS. The results showed that, in contrast to sham stimulation, left anodal/right cathodal tDCS reduced corruption rate both in high and low entrusted amount while right anodal/left cathodal tDCS only prolonged subjects' reaction time (RT) of dishonest response only in high entrusted amount. A possible explanation for the results of current study is that the left DLPFC is associated with the emotional process, which influenced the moral intuition aspect of moral judgment and reflected in the change of immoral behavior rate. While the right DLPFC is associated with cognitive control, which influenced the moral reasoning aspect of moral judgment and reflected in the change of reaction time. This explanation is also consistent with the Emotion-Evoked Collective Corruption Model and dual process theory of brain function.

中文翻译：

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调节背外侧前额叶皮层中的活性改变腐败行为：一项经颅直流电刺激研究。

腐败行为因其对公共社会的巨大危害而受到全世界的关注。为了减少腐败，研究人员进行了许多关于预防腐败的研究。研究人员发现，除了外部监督之外，道德判断等内部因素也对腐败行为产生影响。先前的大脑成像和刺激研究表明，背外侧前额叶皮层（DLPFC）是整合道德判断的情感和认知过程的关键大脑区域。因此，在当前的研究中，我们在DLPFC上应用了tDCS（经颅直流电刺激）来研究皮质兴奋性对腐败行为的调节作用。根据腐败的特点，设计了基于信任博弈的不完全信息投资博弈任务，然后采用受试者之间的设计比较参与者在右阳极/左阴极，左阳极/右阴极和假tDCS中的腐败率和反应时间（RT）。结果表明，与假刺激相比，左阳极/右阴极tDCS降低了高委托量和低委托量下的腐败率，而右阳极/左阴极tDCS仅在高委托量下延长了受试者不诚实反应的反应时间（RT）。量。当前研究结果的一个可能解释是，左DLPFC与情绪过程有关，这影响了道德判断的道德直觉方面，并反映在不道德行为率的变化中。正确的DLPFC与认知控制有关，它影响了道德判断的道德推理方面，并反映在反应时间的变化上。这种解释也与情绪诱发的集体腐败模型和大脑功能的双重过程理论相一致。