负性情绪启动对特质焦虑个体行为抑制的影响机制

The Mechanism of Negative Emotional Priming on Response Inhibition for Trait Anxiety Individuals

采用双选择Oddball范式,通过事件相关电位技术,考察负性情绪启动对特质焦虑个体行为抑制的影响。结果发现:(1)相比标准刺激,对偏差刺激的反应时更长;P2、N2、P3的波幅更大;(2)相比低唤醒负性情绪和中性情绪启动条件,高唤醒负性情绪启动下的N1–P2和N2波幅更大;非特质焦虑个体对偏差刺激的N1和P3潜伏期在高唤醒负性情绪启动条件下比低唤醒负性情绪和中性情绪启动条件下更短,P3波幅更小,而特质焦虑个体在高、低唤醒的负性情绪及中性情绪启动条件下无显著差异。以上结果表明,对特质焦虑个体,高唤醒负性情绪启动促进其更好的检测行为抑制;对非特质焦虑个体,高唤醒负性情绪启动促进其对偏差刺激的早期识别、行为抑制的检测并更容易地完成行为抑制任务。

To explore the mechanism of negative emotional priming on response inhibition for trait anxiety individuals,the ERPs were recorded during a two-choice Oddball task.The results showed that:(1)The response time was longer to the deviant stimulus than to the standard stimulus;P2,N2,and P3 also have a larger amplitude.(2)Compared with low arousal and neutral priming conditions,the amplitudes of N1-P2 and N2 under high arousal negative priming were larger;for non-trait anxiety individuals,the latency of N1 and P3 under the high arousal negative priming was shorter than that under low arousal negative and neutral priming.The amplitude of P3 was smaller too.However,there were no significant differences among different priming conditions for trait anxiety individuals.The results suggested that high arousal negative priming promotes a better detection of behavioral inhibition for trait anxiety individuals;while the high arousal negative priming promotes the early recognition of deviant stimuli,the detection of behavioral inhibition and the completion of the response inhibition task for non-trait anxiety individuals.