Unit of Cognitive Neurosciences and Cerebral Imaging, CNRS, Paris, France.
Brain Cogn. 2011 Mar;75(2):182-7. doi: 10.1016/j.bandc.2010.11.012. Epub 2010 Dec 9.
Time perception, crucial for adaptive behavior, has been shown to be altered by emotion. An arousal-dependent mechanism is proposed to account for such an effect. Yet, physiological measure of arousal related with emotional timing is still lacking. We addressed this question using skin conductance response (SCR) in an emotion regulation paradigm. Nineteen participants estimated durations of neutral and negative sounds by comparing them to a previously memorized duration. Instructions were given to attend either to temporal or to emotional stimulus features. Attending to emotion with negative sounds generated longer subjective duration and greater physiological arousal than attending to time. However, a shared-attention condition showed discrepancy between behavioral and physiological results. Supporting the idea of a link between autonomic arousal and subjective duration, our results however suggest that this relation is not as direct as was expected. Results are discussed within recent model linking time perception, emotion and awareness.
时间知觉对于适应性行为至关重要，已有研究表明情绪会改变时间知觉。一种唤醒依赖机制被提出以解释这种效应。然而，与情绪时间相关的生理唤醒测量仍缺乏。我们使用情绪调节范式中的皮肤电反应 (SCR) 来解决这个问题。19 名参与者通过将中性和负性声音与之前记忆的时间进行比较来估计声音的持续时间。指令要求参与者注意时间或情绪刺激特征。与关注时间相比，关注负性声音会产生更长的主观持续时间和更大的生理唤醒。然而，共享注意条件显示出行为和生理结果之间的差异。支持自主唤醒和主观持续时间之间存在联系的观点，然而，我们的结果表明，这种关系并不像预期的那样直接。该结果在最近将时间知觉、情绪和意识联系起来的模型中进行了讨论。
