Table_1_Event-Related Potential Correlates of Valence, Arousal, and Subjective Significance in Processing of an Emotional Stroop Task.XLS

The present study is the first to measure event-related potentials associated with the processing of the emotional Stroop task (EST) with the use of an orthogonal factorial manipulation for emotional valence, arousal, and subjective significance (the importance of the current experience for goals and plans for the future). The current study aimed to investigate concurrently the role of the three dimensions describing the emotion-laden words for interference control measured in the classical version of the EST paradigm. The results showed that reaction times were affected by the emotional valence of presented words and the interactive effect of valence and arousal. The expected emotional arousal effect was only found in behavioral results for neutrally valenced words. Electrophysiological results showed valence and subjective significance correlated with the amplitude differences in the P2 component. Moreover, the amplitude of the N450 component varied with the level of subjective significance. This study also demonstrated that exploratory event-related potential analysis provides additional information beyond the classical component-based analysis. The obtained results show that cognitive control effects in the EST may be altered by manipulation in the subjective significance dimension.

本研究首次通过针对情绪效价、唤醒度及主观显著性（即当前体验对未来目标与计划的重要性）的正交因子操纵，测量了情绪斯特鲁普任务（emotional Stroop task, EST）加工相关的事件相关电位（event-related potentials）。本研究旨在同时探究：描述情绪性词汇的三个维度，在经典情绪斯特鲁普任务范式所测得的干扰控制过程中所发挥的作用。结果显示，刺激词汇的情绪效价以及效价与唤醒度的交互效应，均会对反应时产生影响。预期的情绪唤醒度效应仅在中性效价词汇的行为实验结果中被观测到。电生理结果表明，情绪效价与主观显著性均与P2成分（P2 component）的振幅差异存在相关性。此外，N450成分（N450 component）的振幅随主观显著性水平的变化而改变。本研究还证实，探索性事件相关电位分析能够提供经典基于成分分析所无法涵盖的额外信息。所得结果表明，情绪斯特鲁普任务中的认知控制效应可通过操纵主观显著性维度得以改变。