Recognizing dynamic facial expressions of emotion: Specificity and intensity effects in event-related brain potentials
Recognizing dynamic facial expressions of emotion: Specificity and intensity effects in event-related brain potentials
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DOI：
10.1016/j.biopsycho.2013.12.003
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发表时间：
2014-02-01
影响因子：
2.6
通讯作者：
Sommer, Werner
中科院分区：
文献类型：
--
作者：
Recio, Guillermo;Schacht, Annekathrin;Sommer, Werner
情绪化的面部表情通常从中性表情动态地产生。然而，大多数以前的研究集中在静态图像。本研究探讨了动态面部表情加工的基本方面。在两个实验中，我们呈现了六种基本情绪的面部表情的短视频，以及在可变和固定的上升时间出现的非情绪面部运动，达到不同的强度水平。在事件相关脑电位（ERP），情绪的影响，但也为非情绪运动出现早期后负波（EPN）之间的200和350毫秒，这表明早期的视觉编码的整体促进所有面部运动。这些EPN效应是情绪非特异性的。相反，相对于快乐和中性的表情，负面情绪的表达引起了更大的晚期积极ERP成分（LPC），表明一个更复杂的处理。EPN和LPC振幅均随表达强度增加而增加。情绪和强度的影响是加性的，表明强度（理解为运动的程度）增加了情绪表达的影响，但不是它的质量。这些过程可以由所有基本情绪驱动，即使统计功率相当大（N（实验2）= 102），也几乎没有情绪特异性。(C)2013爱思唯尔有限公司版权所有。
Emotional facial expressions usually arise dynamically from a neutral expression. Yet, most previous research focused on static images. The present study investigated basic aspects of processing dynamic facial expressions. In two experiments, we presented short videos of facial expressions of six basic emotions and non-emotional facial movements emerging at variable and fixed rise times, attaining different intensity levels. In event-related brain potentials (ERP), effects of emotion but also for non-emotional movements appeared as early posterior negativity (EPN) between 200 and 350 ms, suggesting an overall facilitation of early visual encoding for all facial movements. These EPN effects were emotion-unspecific. In contrast, relative to happiness and neutral expressions, negative emotional expressions elicited larger late positive ERP components (LPCs), indicating a more elaborate processing. Both EPN and LPC amplitudes increased with expression intensity. Effects of emotion and intensity were additive, indicating that intensity (understood as the degree of motion) increases the impact of emotional expressions but not its quality. These processes can be driven by all basic emotions, and there is little emotion-specificity even when statistical power is considerable (N (Experiment 2) = 102). (C) 2013 Elsevier B.V. All rights reserved.