|其他题名||Social discrepant information processing: ERP studies|
|关键词||社会认知 冲突 情绪 Erp|
|摘要||冲突加工在日常生活很重要。冲突划分为社会和非社会冲突。社会冲突的研究结果尚不明确，该研究进行了三项ERP实验以探讨社会冲突加工的认知过程与脑机制。实验1比较社会与非社会认知的差异，实验2探讨社会情绪的负性偏向，实验3基于实验1与2，探讨社会冲突加工受情绪状态的影响机制。结果如下： 1．社会与非社会信息加工在刺激后200ms即表现出注意分配的差异，非社会任务诱发的P2较社会任务的大，人脑对非社会的属性的加工较多；而FN则反映非社会的评价系统激活的较社会的早，同时社会任务表现出右半球优势。 2．悲伤可以诱发负性偏向。悲伤诱发的P2潜伏期小于愉快与中性图片诱发的P2潜伏期，较早吸引注意，具备加工优势。悲伤较愉快图片诱发更大N2，N2反映情绪的共情，表明人易于被悲伤所感染，而共情。 3．情绪影响社会认知。正性启动的N400潜伏期较小，波幅较大，正性情绪放大了冲突效应，使冲突评价系统的激活快；表明愉快时，人更多利用刻板信息，以助其更好做出判断。 4．上述研究结果发现，社会认知与社会情绪的加工均存在右半球优势，支持社会认知的大脑偏侧化假说。 综上，社会与非社会认知存在本质差异，二者具备各自特点；社会认知易受情绪影响，使社会认知更复杂。|
Processing of discrepant information is an important part in our everyday life. According to the social attributes of information, it can be categorized into two parts: social discrepancy and nonsocial discrepant information. The researches focused on nonsocial discrepancy are much mature than those of social discrepancy processing. This serial study employed three ERP experiments to explore the attributes of social discrepancy cognition. Experiment one compared the ERP differences between social and nonsocial discrepancy processing, experiment two adopted single stimulus paradigm to explore the negativity attention biases of social emotions, experiment three investigated the affective mechanism of emotions to social discrepancy information with cue-target paradigm, based on the experiment one and two. We invited healthy undergraduates to participate in our researches, in which social gender words and affective images were stimuli to explore the temporal sequences, activated modes and affective mechanisms of social discrepancy. The results were as below: 1. The differences of attention resource distributions between social and nonsocial information processing exhibited as early as 200 ms, since which P2 was evoked in both blocks. The larger P2 in nonsocial block represented the more attention to physical and nonsocial attributes of objects. N300/400 indicated the differences of evaluating systems in each block. The cognitive mechanisms of social and nonsocial tasks were specific, based on the fact: (1) the discrepancy evaluating system was activated earlier in nonsocial block than that of social block; (2) the social cognition performed right hemisphere advantage, but nonsocial task did not so. 2. Social emotions also could raise a negativity bias on attention. The latency of P2 evoked by social sad images was shorter than that of social happiness and neutral images. The latencies of P2 indicated that sad emotions attracted attention earlier, and possessed a processing advantage. The phenomenon that the larger N2 was evoked by social sadness showed that people was easily moved by sad emotions and sympathized the sadness. 3. Emotions affected social discrepancy processing. Positive affective mood magnified the discrepancy effect, based on the smaller latencies of difference N400 and larger amplitudes. Persons with happy mood synthesized social stereotypes to accelerate the social tasks. 4. Three experiments all showed the right hemisphere advantages of social cognition and social emotions, offered more proof in laterality hypothesis of social cognition. Above all, social cognition had essential distinctions with nonsocial cognition; they two had their own specific characteristics. The fact that social cognition was prone to be affected by different emotional mood made it more complex.
|郭军锋. 社会冲突信息加工的事件相关电位研究[D]. 北京. 中国科学院研究生院,2007.|
|社会冲突信息加工的事件相关电位研究.pd（1826KB）||学位论文||限制开放||CC BY-NC-SA||浏览 请求全文|