中文摘要：

利用ERP技术研究认知重评对积极情绪调节及后续认知任务的影响。先呈现积极图片,要求被试被动观看或认知重评。接着呈现情绪词,要求被试进行效价判断。结果显示,在情绪调节阶段,与被动观看或评价忽视相比,评价重视调节下的LPP更大。在词呈现阶段,被试的反应时受情绪调节的影响,表现为：评价忽视〉评价重视〉被动观看。在160-720ms期间,认知重评之后词汇所诱发的ERP与被动观看后词汇的ERP有显著差异,支持情绪调节损耗认知资源的观点。

英文摘要：

Emotion regulation refers to the processes in which people increase,maintain or decrease their positive or negative emotions.Cognitive reappraisal is a common emotion regulation strategy.So far,many studies have mainly focused on cognitive reappraisal regulation for negative emotion.Employing the event-related potential（ERP） measurements,some studies have associated decreasing regulation of negative emotion with the reduction in the amplitude of late positive potentials（LPP）.Compared with negative emotion regulation,positive emotion regulation via cognitive reappraisal strategies remains little known.In addition,emotionally charged events and our reactions to these events often affect subsequent experiences.However,no studies have assessed the influence of cognitive reappraisal strategies on the processing of words presented after the positive emotion regulation period.Thus,using behavioral and ERP measurements,the objective of the oresent study is to investigate the neural correlates of cognitive reappraisal regulation for positive emotion and the influence of cognitive reappraisal on the processing of emotional words presented after emotion regulation.Fourteen right-handed undergraduate students（mean age=21.5;5 males and 9 females） participated in the study.In each trial,a positive picture was firstly presented on the screen and the participants were asked to view in a passive way or regulate their emotions via cognitive reappraisal strategies（enhance or decrease）.An emotional word was then presented and the participants were asked to judge the pleasantness of the word.ERPs were recorded from 64 scalp electrodes during emotion regulation and valence categorization.ERP results during emotion regulation indicated that the amplitude of LPP（300800ms） was greater under the enhancing regulation condition than under the decreasing regulation and viewing conditions.During valence categorization,behavioral results showed that reaction times were longer at the decreasing regulation condition than at t