摘要
为了解结果的自我相关性对执行任务和观察任务中内侧额叶负波的影响,研究使用事件相关电位技术观测男女被试在两种任务中,知觉自己结果和他人结果时的神经活动。结果发现执行任务中内侧额叶负波波幅大于观察任务;在执行任务中,男性的内侧额叶负波相对于他人结果,观察自己结果时的波幅更大;在观察任务中,女性的内侧额叶负波相对于自己结果,观察他人结果时的波幅更大,这些结果说明内侧额叶负波反映了个体按照主观标准对结果的情绪动机意义进行监测,男女对社会信息的奖赏评价具有不同的方向性。
Fast outcome evaluation allows for rapid decision-making and adjustment for future behavior.Recent studies utilizing event-related potentials （ERPs） technique to investigate the evaluative processes in the brain,have found a negative deflection mainly at the media-frontal regions of the brain,called as feedback related negativity （also called,media-frontal negativity,MFN）.First,MFN was found in the self-performance task,reflecting that the outcomes were first evaluated as worse than what was anticipated.Subsequent studies found the MFN effects were also obtained in the other-performance gambling tasks while perceiving the outcome,reflecting subjective judgments about whether an event has positive or negative value for the monitored individuals.Our previous study found the MFN was larger in their self-performance task than the other-performance gambling task,but the outcomes of both tasks were their self-related outcomes,with females response differing from males.Previous studies didn＇t separate these confusing factors and it is not clear whether the MFN amplitude is sensitive to their self-performance outcome or their self-related outcome.So we want to investigate the mechanism of perceiving self-related outcome and other-related outcome separately in both gambling tasks.If the MFN of self-related and other-related outcome shows no difference in the self-performance tasks,besides,the amplitude of MFN in the self-performance gambling task is larger than in the other-performance gambling tasks,these suggest that the MFN is sensitive to the self-response outcome.Nevertheless,we should consider the gender difference.Thirty-two participants （16 males and 16 females） completed the self-performance gambling task and observed the other-performance gambling task,and both gambling tasks included self-related outcome and other-related outcome.The electroencephalogram was recorded from 64 scalp electrodes.All of the data were segmented into 700ms epochs,including a 100ms pre-stimulus baseline period,based on ti
出处
《心理学报》
CSSCI
CSCD
北大核心
2010年第2期279-287,共9页
Acta Psychologica Sinica
基金
国家自然科学基金(30670698
30930031)
教育部创新团队项目(IRT0710)资助
关键词
内侧额叶负波
性别差异
结果评价
赌博任务
medial-frontal negativity gender difference outcome evaluation gambling task
