大学生心理理论错误信念任务的事件相关电位特点

发布时间：2019-01-28 08:02

【摘要】：目的:研究心理理论错误信念任务中信念推理和现实推理的脑电特点,对心理理论的脑机制进行初步探讨。方法:在天津师范大学方便选取23名大学生,采用NeuroScan公司64导脑电系统记录其执行图片错误信念任务时的事件相关电位(event-related potentials,ERP)和行为学结果,对被试在执行错误信念任务时分别进行的现实推理和信念推理的ERP结果进行分析,最终有效被试18名。结果:从刺激呈现后约300ms,信念推理和现实推理两种实验条件引起的事件相关脑电开始出现差异,600~900ms时间段内,在AF7[(2.34±2.71)vs.(1.32±2.97)]、FPz[(2.83±3.03)vs.(2.08±2.56)]、AF8[(3.75±2.64)vs.(2.76±2.34)]、T7[(1.31±2.77)vs.(0.68±3.54)]、Cz[(5.11±5.42)vs.(4.52±5.66)]、T8[(2.35±2.24)vs.(2.03±2.00)]及POz[(2.48±2.16)vs.(2.18±2.53)]电极上均表现为信念推理波幅正向大于现实推理波幅(P=0.065),此种差异接近有统计学意义,且主要分布于额叶电极。结论:对心理状态进行推理的神经机制与对现实进行推理的神经机制存在差别,心理理论能力与大脑额叶存在较为密切的关系。
[Abstract]:Aim: to study the EEG characteristics of belief reasoning and realistic reasoning in the misbelief task of theory of mind, and to explore the brain mechanism of the theory of mind. Methods: Twenty-three college students from Tianjin normal University were selected to record the event-related potentials (event-related potentials,ERP) and behavioral results of the patients who performed the task of false belief in images by using the 64-lead EEG system of NeuroScan Company. The ERP results of realistic reasoning and belief reasoning were analyzed respectively when the subjects were performing false belief tasks. Finally, 18 subjects were effective. Results: there were significant differences in event-related EEG between the two experimental conditions (about 300ms after stimulation). During the 600~900ms period, AF7 [(2.34 卤2.71) vs. (1.32 卤2.97)], and (2. 34 卤2. 71) vs. (, 1. 32 卤2. 97) in the 600~900ms period, there were significant differences between the two experimental conditions. FPz [(2.83 卤3.03) vs. (2.08 卤2.56)], AF8 [(3.75 卤2.64) vs. () 2.76 卤2.34], T7 [(1.31 卤2.77) vs. (0.68 卤3.54)], Cz [(5.11 卤5.42) vs. (4.52 卤5.66)], Both T8 [(2.35 卤2.24) vs. (2.03 卤2.00)] and POz [(2.48 卤2.16) vs. (2.18 卤2.53)] electrodes showed that the amplitude of positive inference wave was larger than that of real inference wave (P0. 065). The difference was close to statistical significance, and mainly distributed in frontal lobe electrode. Conclusion: there is a difference between the neural mechanism of reasoning mental state and the neural mechanism of reasoning reality. The ability of mental theory is closely related to the frontal lobe of brain.
【作者单位】：天津市儿童医院心理科;天津师范大学心理与行为研究院;
【分类号】：B844.2

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