Abstract: Students dedicated to induce depression by using film clips were randomly assigned to rumination or distraction group for response strategy during the presentation of sad or neutral face pictures. The electrical activity were recorded to investigate the effects of response style on event-related potentials(ERPs)changes during emotional face processing after the induction of depressive mood. The behavior experiments found that the T2 score in the rumination group was higher than in the distraction group. Moreover, the T2 score was higher than T1 score in the rumination group, while the T2 score was lower than T1 score in the distraction group. The ERP study results showed that N1 had no significant difference between the two groups. Compared with LPP in the distraction group, LPP was significantly increased at Cz and Pz electrodes in the rumination group. In the ruminating group, amplitudes at Pz was significantly increased than Cz and Fz, while in distracting group, no difference among the three electrode cites was observed. It can be concluded that responses styles can influence the judgment of emotional faces after the induction of depressive mood. It is mainly reflected in the late face processing.

Key words: rumination, distraction, depression, event-related potentials(ERP).

摘要： 采用电影片段诱发被试的抑郁情绪，将诱发后的被试分为沉思组和分心组，分别对悲伤面孔和中性面孔刺激进行沉思或分心的反应，并用事件相关电位技术（ERP）探讨抑郁情绪下不同反应方式对个体面孔表情加工的影响。行为数据结果发现沉思组实验任务结束后的抑郁情绪值（T2）比分心组更高；实验任务结束后沉思组抑郁情绪值增高，而分心组降低；脑电数据结果发现N1波未受反应方式的影响；沉思组比分心组诱发出更大的晚期峰值的正电位（LPP）峰值；沉思组Pz点LPP峰值最高，而分心组不同电极并无显著差异。该研究结果表明抑郁情绪下不同反应方式会影响个体对于面孔表情的判断，主要体现在面孔表情的晚期加工阶段。

关键词: 沉思, 分心, 抑郁, 事件相关电位。