Affective learning increases sensitivity to graded emotional faces
Affective learning increases sensitivity to graded emotional faces
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DOI：
10.1037/1528-3542.8.1.96
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发表时间：
2008-02-01
期刊：
影响因子：
4.2
通讯作者：
Pessoa, Luiz
中科院分区：
文献类型：
--
作者：
Lim, Seung-Lark;Pessoa, Luiz
情绪化面孔的情感意义如何影响感知决策？我们通过将100%恐惧的面孔与厌恶的电刺激配对来操纵情感显著性，并假设通过其先前历史增加刺激的显著性会导致加工增强。在恐惧条件反射之后，参与者观看了从中性到恐惧的分级情绪面孔。在条件反射过程中，研究人员向受试者展示的面部颜色要么是先前与电击配对的，要么是未与电击配对的。在中等强度水平（40-60%恐惧）的面孔中，“恐惧”反应的频率增加最为明显。与数据相符的心理测量显示，相对于受损的面孔，受到电击的面孔的敏感性显著增加。因此，尽管电击配对和受损刺激的身体特征相同（除了颜色，这是平衡的），但当参与者看到情感显著的刺激时，他们会做出更频繁（也更快）的“恐惧”反应。
How does the affective significance of emotional faces affect perceptual decisions? We manipulated affective significance by pairing 100% fearful faces with aversive electrical stimulation and hypothesized that increasing the significance of a stimulus via its prior history would lead to enhanced processing. After fear conditioning, participants viewed graded emotional faces that ranged from neutral to fearful. Faces were shown either in a color that was previously paired with shock or a color not paired with shock during conditioning. Increases in the frequency of "fearful" responses for faces shown in the shock-paired color were most robust for faces at intermediate intensity levels (40-60% fearful). Psychometric fits to the data revealed significant increased sensitivity for shock-paired relative to impaired faces. Thus, despite identical physical features for shock-paired and impaired stimuli (aside from the color, which was counterbalanced), more frequent (and faster) "fearful" responses were made when participants viewed affectively significant stimuli.