Abstract: Since individuals with trait anxiety are susceptible to anxiety disorders and exhibit threatening attentional bias, their inhibition function are impaired in the central executive system. However, it is not clear how different emotional evaluation stimuli will affect inhibition function in individuals with trait anxiety. To this end, event-related potentials were recorded from college student groups with high trait anxiety (HTA) and low trait anxiety(LTA) while they performed antisaccade tasks and prosaccade tasks under positive evaluation, negative evaluation, and no evaluation condition. The results indicated that error rate of HTA group was higher than LTA group; reaction time of HTA group was slower than LTA group in antisaccade tasks of positive evaluation. Moreover, the P3b amplitudes in positive evaluation were higher than negative evaluation of LTA group, while no significant evaluation differences were found in the HTA group. These observations suggest that positive evaluation harms inhibition function in individuals with high trait anxiety, while negative evaluation promotes inhibition function in individuals with high trait anxiety.

Key words: trait anxiety, inhibition function, emotional evaluation, P3b

摘要： 特质焦虑者作为焦虑障碍易感性个体，会表现出对威胁性刺激的注意偏向，从而损害中央执行系统的抑制功能。但是不同情绪性评价刺激会如何调控特质焦虑者的抑制功能还不太清楚。为此，本研究以脑电P3b为抑制功能指标，要求高低特质焦虑组在三种不同评价下完成反向眼跳范式，考察不同性质的评价如何影响特质焦虑的抑制功能。行为结果发现，高焦虑组比低焦虑组错误率更高；积极评价条件下，高焦虑组的反应时慢于低焦虑组。ERP结果进一步发现，无评价条件下，高焦虑组的P3b波幅大于低焦虑组；低焦虑者在积极评价条件下的P3b波幅大于消极评价条件，但是高焦虑者没有显著差异。结果表明，积极评价会损害高特质焦虑者的抑制功能，而消极评价则促进了高特质焦虑个体的抑制功能。

关键词: 特质焦虑, 抑制功能, 评价, P3b