Morel Shasha, George Nathalie, Foucher Aurélie, Chammat Mariam, Dubal Stéphanie
CNRS, UMR 7295, CeRCA, Université François-Rabelais, Tours, France.
Institut du Cerveau et de la Moelle Epinière (ICM), Social and Affective Neuroscience Lab, Paris, France; Université Pierre et Marie Curie-Paris 6, ICM, UMR_S 1127, and Centre MEG-EEG-CENIR, Paris, France; CNRS, UMR 7225, ICM and Centre MEG-EEG, Paris, France; Inserm, U 1127, ICM and Centre MEG-EEG, Paris, France; ENS, Centre MEG-EEG, Paris, France.
Biol Psychol. 2014 May;99:183-92. doi: 10.1016/j.biopsycho.2014.03.011. Epub 2014 Apr 4.
The present study examined the influence of trait anxiety on the early stages of emotional face processing. In order to test if such early effect of anxiety could appear in response to positive as well as to negative stimuli, we recorded event-related potentials in response to both happy and fearful faces - contrasted with neutral faces - during a task where attention was explicitly directed to the emotion, in two groups differing by their anxiety level. We observed an amplification of the occipital P1 peak (90-120 ms) in response to happy compared to neutral faces in high trait anxious participants but not in the low trait anxious ones. Additionally, the N170 and EPN components were enhanced for the negative (fearful) faces, with no impact of trait anxiety. Our results provide evidence for an early bias towards positive stimuli in trait anxiety.
本研究考察了特质焦虑对情绪面孔加工早期阶段的影响。为了测试焦虑的这种早期效应是否会在对积极和消极刺激的反应中出现，我们在一项明确将注意力导向情绪的任务中，记录了两组焦虑水平不同的被试在观看快乐和恐惧面孔（与中性面孔对比）时的事件相关电位。我们观察到，与中性面孔相比，高特质焦虑的参与者在观看快乐面孔时枕叶P1波峰（90 - 120毫秒）增强，而低特质焦虑的参与者则没有。此外，消极（恐惧）面孔的N170和EPN成分增强，特质焦虑对此没有影响。我们的结果为特质焦虑中对积极刺激的早期偏向提供了证据。
