Is a neutral face really evaluated as being emotionally neutral?
Is a neutral face really evaluated as being emotionally neutral?
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DOI：
10.1016/j.psychres.2007.02.005
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发表时间：
2008-01-15
影响因子：
11.3
通讯作者：
An, Suk Kyoon
中科院分区：
文献类型：
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作者：
Lee, Eun;Kang, Jee In;An, Suk Kyoon
大多数关于情绪的功能神经成像研究都将中性面孔作为基线条件。本研究的目的是探索典型的中性面孔是否被评估为表现出中性情绪。21名受试者进行了外在情感西蒙任务(EAST)，这是一项经过验证的内隐任务，衡量的是对目标刺激的情绪评估。所有的刺激都由标准化面部图片中的两张并置的面孔组成。属性刺激(正性与负性)需要根据外在效价进行分类，以黑白面孔图片呈现。目标刺激是经过颜色过滤的正面、负面、中性和正面/负面面孔，并指示受试者根据过滤后的颜色(蓝色与绿色)对它们进行分类。对积极目标面孔的反应与积极情绪有关，对消极目标面孔的反应与消极情绪相关。对于中性面孔，反应与消极面孔相似，而对于正面/负面刺激，反应是无差别的。这些发现表明，在某些情况下，典型的“中性”面孔可能会被评估为阴性，这表明，将中性面孔作为基线条件可能会在功能神经成像研究中引入实验性的混乱。(C)2007爱思唯尔爱尔兰有限公司。保留所有权利。
Most of the functional neuroimaging studies on emotion have used neutral faces as a baseline condition. The aim of the present study was to explore whether prototypical neutral faces are evaluated as displaying neutral emotions. Twenty-one subjects performed the Extrinsic Affective Simon Task (EAST), a validated implicit task that measures the emotional evaluation of target stimuli. All stimuli consisted of two juxtaposed faces from standardized facial pictures. The attribute stimuli (positive vs. negative), which needed to be classified on the basis of extrinsic valence, were presented as black and white facial pictures. The target stimuli were color-filtered positive, negative, neutral, and positive/negative faces, and subjects were instructed to classify them on the basis of the filtered color (blue vs. green). The responses to the positive target faces were associated with the positive emotions and the responses to the negative target faces were associated with the negative emotions. For the neutral faces, the responses were similar to those of negative faces, while for the positive/negative stimuli, the responses were undifferentiated. These findings suggested that prototypical "neutral" faces may be evaluated as negative in some circumstances, which suggests that the inclusion of neutral faces as a baseline condition might introduce an experimental confound in functional neuroimaging studies. (c) 2007 Elsevier Ireland Ltd. All rights reserved.