Kim Inik, Kim Hyeonjung, Kim Jongwan
Department of Psychology, Jeonbuk National University, South Korea.
Int J Psychophysiol. 2023 Nov;193:112242. doi: 10.1016/j.ijpsycho.2023.112242. Epub 2023 Sep 14.
Despite the growing necessity of understanding the dynamics of emotion by naturalistic stimuli, averaging time-locked responses seems insufficient to capture emotional experiences that change over time. Intersubject correlation (ISC) has been implemented to examine dynamic emotional experiences by quantifying the consistency of responses across individuals. While previous research has shown that enhanced psychophysiological ISC can capture dynamic emotional experiences in response to long-lasting videos that evoke dimensional emotions, it is not yet fully understood how psychophysiological consistency varies during videos that elicit distinct emotions, such as fear. In this study, we re-analyzed publicly available data consisting of continuous affect annotations and psychophysiological signals, namely heart rate (HR), electrodermal activity (EDA), electromyographic signals from zygomaticus major (EMG-z), and corrugator supercilii (EMG-c), in response to categorical emotional videos, namely amusing, boring, relaxing, and fearful. Results showed an overall increase in ISC in multiple measures during fearful videos, indicating that emotional experiences during fearful videos were reliably consistent across participants. The effect of amusing and boring videos on ISC revealed varying results depending on the measurements. In particular, larger ISC in valence rating, EDA, and EMG-z was found for amusing than boring videos, whereas larger ISC in HR and EMG-c was observed for boring than amusing movies. Lastly, decreased ISC for relaxing videos was observed across multiple measurements, showing inconsistent emotional experiences during relaxing videos. This study builds on previous research on physiological consistency during emotional experiences by examining how the consistency of continuous affect annotations and psychophysiological measures differs in response to videos that elicit distinct emotions.
尽管通过自然主义刺激来理解情绪动态变得越来越必要，但平均时间锁定反应似乎不足以捕捉随时间变化的情绪体验。已经采用了个体间相关性（ISC）来通过量化个体间反应的一致性来检验动态情绪体验。虽然先前的研究表明，增强的心理生理ISC能够捕捉对引发维度情绪的持久视频的动态情绪体验，但对于在引发不同情绪（如恐惧）的视频过程中心理生理一致性如何变化，尚未完全理解。在本研究中，我们重新分析了公开可用的数据，这些数据包括连续情感注释和心理生理信号，即心率（HR）、皮肤电活动（EDA）、来自颧大肌的肌电信号（EMG-z）和皱眉肌的肌电信号（EMG-c），这些数据是对分类情感视频（即有趣、无聊、放松和恐惧）的反应。结果显示，在恐惧视频期间，多种测量指标的ISC总体上有所增加，表明恐惧视频期间的情绪体验在参与者之间具有可靠的一致性。有趣和无聊视频对ISC的影响因测量指标而异。特别是，发现有趣视频在效价评分、EDA和EMG-z方面的ISC比无聊视频更大，而无聊电影在HR和EMG-c方面的ISC比有趣电影更大。最后，在多种测量指标中观察到放松视频的ISC下降，表明放松视频期间的情绪体验不一致。本研究通过考察连续情感注释和心理生理测量的一致性在对引发不同情绪的视频的反应中如何不同，建立在先前关于情绪体验期间生理一致性的研究基础之上。
