Skin Conductance Response (SCR) is a phasic change in electric conductivity of the skin, occurring either non-specifically, or in response to a stimulus (event-related, or ER-SCR). It has long been understood that ER-SCR amplitudes are greater when associated with unpleasant or high-arousal stimuli; however, the relationship between emotional valence and arousal to other ER-SCR measures such as ER-SCR latency (interval between stimulus onset and ER-SCR onset) and ER-SCR rise time (interval between ER-SCR onset and peak amplitude) is less well-established. Here, we presented 60 emotive pictures from IAPS and NAPS affective picture systems to a group of 100 young, healthy adults (50 male and 50 female) and recorded their electrodermal activity. We found that higher emotional arousal was associated with greater ER-SCR amplitudes and shorter ER-SCR rise times. Interestingly, while the increase in ER-SCR amplitudes was only observed for a subset of high-arousal stimuli (score 7-9 on a 9 point scale), the effect on ER-SCR rise times was more graded and particularly sensitive to the difference between low (score 1-3) and medium-arousal (score 4-6) categories. Next, we found that while ER-SCR amplitudes were greater in response to unpleasant stimuli (valence score 1-3 on a 9-point scale), none of the ER-SCR measures could distinguish between neutral (score 4-6) and positive stimuli (score 7-9). We suggest that the increase in ER-SCR amplitudes for unpleasant stimuli is primarily driven by the inherent association between unpleasantness and high arousal. In conclusion, we demonstrate that ER-SCR rise time conveys valuable information about emotional arousal and represents a useful complementary measure to ER-SCR amplitude in order to discern between multiple degrees of emotional arousal. Furthermore, this study confirms the cross-cultural validity of the IAPS and NAPS databases in a sample of young adult Czechs.

中文翻译：

---

在计算机屏幕上呈现的情感图片引起的不同程度的情绪唤起中，皮肤电导的上升时间和幅度可以辨别

皮肤电导率响应（SCR）是皮肤电导率的相位变化，它是非特定发生的，或者是对刺激（事件相关或ER-SCR）的响应。长期以来，人们一直认为，与不愉快或高刺激性刺激相关时，ER-SCR振幅会更大。但是，情绪价与唤醒其他ER-SCR指标（例如ER-SCR潜伏期（刺激发作与ER-SCR发作之间的间隔）和ER-SCR上升时间（ER-SCR发作与峰值幅度之间的间隔）之间的关系为不太成熟。在这里，我们向100位年轻健康的成年人（50位男性和50位女性）展示了来自IAPS和NAPS情感图片系统的60张情感图片，并记录了它们的皮肤电活动。我们发现，较高的情绪唤起与更大的ER-SCR振幅和更短的ER-SCR上升时间相关。有趣的是，虽然仅在一部分高声刺激中观察到ER-SCR振幅的增加（9分制的得分为7-9），但对ER-SCR上升时间的影响更为分级，并且对差异特别敏感介于低（1-3分）和中等-（4-6分）类别之间。接下来，我们发现虽然ER-SCR幅值对不愉快的刺激有较大反应（以9分制的价分1-3），但没有ER-SCR措施可以区分中性（得分4-6）和阳性刺激（得分7-9）。我们建议，不愉快刺激的ER-SCR幅度增加主要是由不愉快和高唤醒之间的固有联系驱动的。结论，我们证明了ER-SCR上升时间传达了有关情绪唤醒的有价值的信息，并代表了ER-SCR振幅的一种有用的补充措施，以区分情绪唤醒的多个程度。此外，这项研究证实了成年捷克年轻人样本中IAPS和NAPS数据库的跨文化有效性。