高强迫倾向个体注意脱困的电生理证据  

Attention Bias in High Obsessive-compulsive Tendency Individuals: An ERP Study

作　　者：汪孟允 苗小翠 李益娟[1] 胡思思[1] 张仲明[1] 

机构地区：[1]西南大学心理学部,认知与人格教育部重点实验室(西南大学),重庆400715

出　　处：《心理科学》2015年第6期1282-1289,共8页Journal of Psychological Science

基　　金：国家自然科学基金项目(31171006);国家留学基金委(201306995011);西南大学心理学部2011项目(TR201205-5)的资助

摘　　要：对威胁信息的注意偏向可能是导致和维持强迫症症状的重要因素之一。本研究采用情绪Stroop范式,同时结合事件相关电位(ERPs)技术,对强迫倾向个体注意偏向的时间进程进行研究,以期探究强迫倾向个体注意偏向的神经机制特点。结果发现,高强迫倾向个体对强迫症相关消极词比一般消极词和中性词表现出了更大的P2和LPPs振幅。实验结果表明,高强迫倾向个体对强迫症相关消极词表现出注意偏向,其成分为注意脱困,既表现在早期自动加工阶段的P2成分上也表现在晚期策略加工阶段的LPPs成分上。Obsessive-Compulsive Disorder（OCD） is characterized by persistent and unwanted obsessions mostly accompanied by ritualistic compulsions. According to the World Health Organization, OCD is one of the top 10 causes of disability, manifesting its severe impact on quality of life. But the mechanism of OCD is still unclear. Some researchers suggested that the attention bias to threat-related stimuli may be the cause and maintenance of OCD. In the past few decades, many studies have investigated attention bias in OCD by using the emotional Stroop task, mostly relying on reaction time. However, those behavioral studies provide little information about the relative involvement of sensory versus cognitive processes in attention bias. Therefore, we use ERPs（Event Related Potentials）, which can exquisite temporal resolution and sensitivity to emotional processing, to explore the time course of attention bias in high obsessive-compulsive tendency individuals （HOC）. Meanwhile, there was an evidence that the component of attention bias in HOC is difficulty in disengaging attention away from threat. So, which ERPs component will be represented to reflect this information processing. In order to fulfill our curiosity in this two questions, we carried out this research. Accordingly, we obtained the behavioral and electroencephalogram （EEG） data from HOC using the emotional Stroop task. Brain electrical activity was recorded from 64 scalp sites using tin electrodes mounted in an elastic map（Brain Products GmbH, Gilchiing, Germany）, with the reference electrodes placed on the left and right mastoids. The experiment was designed to discover the component of attention bias in HOC by manipulating stimulus types（OCD related negative words, generate negative words, neutral words） and different groups （HOC and LOC）. Generate negative words and neural words were selected from previous studies（Moritz, et al., 2004; Thomas, Johnstone, ＆ Gonsalvez, 2007）, OCD related negative words were chosen by clinical ps

关 键 词：注意偏向 强迫倾向 ERPS 情绪Stroop 注意脱困 

分 类 号：B842[哲学宗教—基础心理学]