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目的:从Gross的情绪过程模型出发,利用双任务范式研究在情绪产生过程中注意分散是否调节晚期正电位(late positive potential,LPP)。方法:招募20名大学生(9男/11女),从中国情感图片系统选择正性、中性和负性情境图各29张为刺激,采用默数和深呼吸为注意分散任务,记录和测量情绪状态强度和事件相关电位数据。结果:默数、深呼吸条件下所评价的情绪状态强度显著小于看条件。LPP波幅在早期(350-650 ms)、中期(650-1050 ms)和晚期(1050-1500 ms)窗口呈现出不同的任务与图片效价交互作用。从350 ms开始,默数条件下三种图片的LPP波幅低于看条件;深呼吸条件下负性图片的LPP波幅低于看条件,但在晚期窗口正性和中性图片的LPP波幅与看条件无差异。结论:注意分散不仅有效降低被试的主观情绪状态强度,而且能够调节LPP波幅,是有效的情绪调节策略,但默数和深呼吸对不同效价的图片呈现出不同的时间过程模式。
OBJECTIVE: To explore whether or not late dispersion (LPP) regulates late dispersion during the process of emotion production from Gross’s emotional process model. Methods: Twenty college students (9 males / 11 females) were enrolled in this study. Thirty-nine Chinese motivational picture systems were selected as positive, neutral and negative scenarios. Each of them was motivated by silent and deep breaths. Dispersion, recording and measuring emotions Status strength and event related potential data. Results: The intensity of emotional state evaluated under silent and deep breaths was significantly less than that of looking at conditions. LPP amplitudes show different tasks interacting with image tweets in the early (350-650 ms), metaphase (650-1050 ms) and late (1050-1500 ms) windows. From 350 ms onwards, the LPP amplitudes of the three pictures under the silent condition are lower than the look-ahead conditions; the LPP amplitude of the negative picture under the deep-breath condition is lower than the look-ahead condition, but the LPP amplitudes of the positive and negative pictures of the late window are similar to the condition No difference. CONCLUSIONS: Attention to distraction not only effectively reduces participants’ subjective emotional state intensity but also regulates the amplitude of LPP, which is an effective strategy for emotion regulation. However, silent and deep breathing show different temporal process patterns for different titer images.