【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。更多还原

【Abstract】 Objective:The current study adopted the event-related potentials(ERP)paradigm to investigate the activity of brain potentials engaged during false believe task in healthy adults,and discuss the brain mechanism underlying theory-of-mind(TOM)primitively.Methods:The ERP elicited by the picture false belief task were recorded in 23 college students and their behavioral performances were collected.The ERP waveforms of both belief and reality judgment were analyzed.Results:The significant differences were found between the two experiment conditions from the 300 ms after the presentation of stimuli.The differences between belief waveforms and reality waveforms were nearly significant in 600~900 ms window at 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)]and POz[(2.48±2.16)vs.(2.18±2.53)](P=0.065).And at all frontal lobe electrodes the directions of the differences were same.Conclusion:These findings suggest that brain mechanism of belief and reality judgment are different.更多还原