Probe P3 and blinks: Two measures of affective startle modulation
Probe P3 and blinks: Two measures of affective startle modulation
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DOI：
10.1111/j.1469-8986.1997.tb02409.x
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发表时间：
1997-01-01
期刊：
影响因子：
3.7
通讯作者：
Lang, PJ
中科院分区：
文献类型：
--
作者：
Schupp, HT;Cuthbert, BN;Lang, PJ
当个体观看不同愉悦度和唤醒度的图片时，对诱发惊吓反应（诱发眨眼反射和事件相关电位）的两项同时测量进行了测量。重复之前的发现，眨眼反应受到图片愉悦度的调节，在观看不愉快的图片与愉快的图片时会引发更大的反射。然而，探针 P3 主要受图片唤醒的调节，观看情感（愉快或不愉快）图片时引发的 P3 反应比观看中性图片时要小。对于在随后的图片图像周期中呈现的探针来说，这两种调节作用都得到维持。这些数据表明，对同一惊吓探针的两种可测量反应会受到情绪背景的不同影响，眨眼幅度随愉悦程度而变化，探针 P3 随刺激唤醒而变化。
Two concurrent measures of the evoked startle response, the elicited blink reflex and the event-related potential, were measured while individuals viewed pictures that varied in pleasure and arousal. Replicating previous findings, the blink response was modulated by picture pleasantness, with larger reflexes elicited in the context of viewing unpleasant versus pleasant pictures. However, the probe P3 was primarily modulated by picture arousal, with smaller P3 responses elicited when viewing affective (pleasant or unpleasant) than when viewing neutral pictures. Both modulatory effects were sustained for probes presented in a subsequent picture imagery period. These data suggest that two measurable responses to the same startle probe are differentially modified by emotional context, with blink magnitude varying with pleasure and probe P3 varying with stimulus arousal.