Department of Psychiatry, University of Strasbourg, INSERM U1114, Strasbourg, France.
Department of Psychiatry, University of Strasbourg, INSERM U1114, Strasbourg, France.
Neuropsychologia. 2018 Jun;114:110-117. doi: 10.1016/j.neuropsychologia.2018.04.021. Epub 2018 Apr 24.
If it can be assumed that positive affect modulates cognitive control, the underlying mechanisms remain unclear. The main aim of this study was to investigate how positive affect influences proactive and reactive modes of control and to explore the temporal dynamic of this influence, in terms of its transient and/or sustained effects. We used the AX-continuous performance task, combined with event-related potentials (ERP) recording. The results showed that positive affect impaired proactive control. More specifically, response preparation was weaker, as highlighted by a decreased contingent negative variation (CNV), prior to the target. As a consequence, conflict detection, as reflected by the N2 component, was decreased under positive affect. The P3a, associated with conflict resolution, remained unaffected by positive emotion, suggesting a lack of reactive control modulation. These effects were diffuse and did not appear on a transient timescale, highlighting the importance of positive emotion's time course for how it influences cognitive control processes.
如果可以假设积极情绪调节认知控制，那么其潜在机制仍不清楚。本研究的主要目的是调查积极情绪如何影响主动和被动控制模式，并探讨这种影响的时间动态，包括其瞬态和/或持续效应。我们使用 AX 连续性能任务，结合事件相关电位（ERP）记录。结果表明，积极情绪会损害主动控制。更具体地说，在目标出现之前，由于预备性反应的 contingent negative variation（CNV）减少，反应准备较弱。因此，冲突检测（由 N2 成分反映）在积极情绪下降低。与冲突解决相关的 P3a 不受积极情绪影响，表明缺乏对反应控制的调节。这些影响是弥散的，不会在瞬态时间尺度上出现，这突出了积极情绪对认知控制过程的影响的时间进程的重要性。
