作　　者： (罗俊）; ; (贾拥民）; (陈姝）; (黄达强）;

机构地区： 浙江财经大学经济学院

出　　处： 《心理学报》 2017年第2期228-240,共13页

摘　　要： 行为人的意图动机是我们对日常行为的对错做出判断的重要依据。以往研究表明,左右侧颞顶联合区(TPJ)都可能与信念意图的整合加工能力相关,尤其是近年来越来越多的神经刺激研究为TPJ区域与心理状态归因能力之间的因果关系提供了证据。然而,这些研究在实验任务的选取,实验设计的优化,实验结论的稳健性上仍然有改进的空间。基于此,本研究开展了两个在设计上互相补充的实验。实验中被试的TPJ区域会接受一段时间的经颅直流电刺激,并完成一系列的道德判断任务,任务是由意图和结果,以及负性和中性2×2双变量构成的4种条件的故事:无伤人、伤人未遂、意外伤人和伤人成功,被试要对故事主角的行为做出谴责程度的道德判断。结合道德判断的谴责程度和决策时间数据发现,当人们在处理信念意图信息时,左右侧TPJ区域可能是协同互动、共同发挥作用的。在激活右侧TPJ并限制左侧TPJ的情况下,人们对负性结果的谴责程度变高,人们变得更加依赖于行为结果做出道德判断;而在限制右侧TPJ并激活左侧TPJ的情况下,人们对负性意图的谴责程度变高,人们变得更加依赖于行为者的动机做出道德判断。 Judgments about whether an action is morally right or wrong typically depend on our capacity to infer the actor＇s beliefs and the outcomes of the action. Prior neuroimaging studies have found that mental state （e.g., beliefs, intentions） attributions for moral judgment involve a complex neural network including the temporoparietal junction （TPJ）. However, neuroimaging studies cannot demonstrate a direct causal relationship between the activity of this brain region and its role in mental state attribution for moral judgment. In the current study, we aimed to provide evidence of a direct link between the neural and behavioral results through the application of transcranial direct current stimulation （tDCS） over the bilateral TPJ of our participants. In the experiment 1, each participant was required to complete two similar tasks of moral judgment before and after receiving tDCS. We studied whether tDCS over the right TPJ and left TPJ altered participants＇ mental state attribution for moral judgment. The results indicated that improving the activity of the right TPJ and restraining the activity of the left TPJ decreased the role of actor＇s beliefs in moral judgments and led to an increase in the dependence of the participants＇ moral judgments on the action＇s consequences. In the experiment 2, the participants were randomly assigned to one of three stimulation treatments （right anodal/left cathodal tDCS, left anodal/right cathodal tDCS, or sham stimulation）. We found that enhancing the excitability of the left TPJ as well as inhibiting the right TPJ using tDCS could strengthen the role of beliefs and intentions in moral judgment, extending the function of the left TPJ in moral judgment. The effect of enhancing the role of beliefs in moral judgment highly depended on contextual settings, demonstrating that the degree of the right TPJ and left TPJ＇s role in the integration of beliefs in moral judgment could be various across different scenario types. These results were robust in the case

关 键 词： 道德判断 意图 结果 双侧颞顶联合区 经颅直流电刺激

领　　域： [哲学宗教—应用心理学] [哲学宗教—心理学] [] []