中国临床心理学杂志

道德厌恶启动后身体清洁词加工的时间特征:来自ERPs的证据

单位：1. 湖南师范大学教育科学学院心理系长沙 410081
2. 广西幼儿师范高等专科学校南宁 530000

关键词：身体清洁道德纯洁 ERPs N400 LPC

分类号：R395.1

出版年,卷(期):页码：2014,22(1):32-37

摘要：

目的:采用事件相关电位技术(ERPs)和语义启动范式,探讨语义启动道德厌恶后对身体清洁词加工的时间特征及其神经机制。方法:采用双字词启动范式,先呈现启动词(道德厌恶词VS非道德厌恶词),然后再呈现目标词(清洁词VS非清洁词),被试对目标词的字形结构作判断。通过启动词与目标词在脑电指标上有无差异来探讨其加工特征。结果:四类刺激在N1、N400成分上没有出现加工差异;在LPC成分上,启动词与目标词交互作用显著,当目标词为清洁词时,道德厌恶词启动条件下比非道德厌恶启动词条件下在左脑前、前中、中脑前部诱发了更大的LPC。结论:道德厌恶启动后个体表现出更强烈的身体清洁倾向,以缓解和释放厌恶感,保持良好的自我道德意象。

Objective: To investigate the complex relationship between physical cleaning and moral purity and the psychological meaning of physical cleaning after moral disgust priming. Methods: Event-related brain potentials were recorded when participants performed character pattern judgment task(up-down/right-left). stimuli words were consisted of four types, 2 types of priming words(the moral-disgust adjective VS non moral-disgust adjective) and 2 types of target words(physical cleaning verbs VS neutral verbs) The ERPs were compared among physical-moral disgust, physical-non-moral disgust, non-physical-moral disgust and non-physical-non-moral disgust words conditions recorded from target stimuli. Results: ERP waveforms showed that N400 amplitude and latency was not significant, but LPC amplitude at 800-1000ms showed significant two-way interactions of priming words × target words. Post hoc analyses confirmed that the LPC amplitude was enlarged to physical cleaning words compared to neutral words in moral disgust. Conclusion: The processing of physical cleaning words and moral disgust words are closely associated at implicit level, suggesting that the moral disgust would induce individual to do physical cleansing for alleviating disgust and maintaining a good moral self image.

基金项目：

国家社会科学基金(11BSH046)；教育部人文社会科学研究一般项目(13YJA190017)；湖南师范大学青年优秀人才培养计划项目(2012YX04)；湖南省研究生创新基金项目(CX2012B193)

作者简介：

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