显著性(神经科学)
心理学
认知心理学
分类
事件相关电位
视觉处理
感觉系统
面部表情
联想学习
认知
结合属性
价(化学)
神经科学
感知
沟通
计算机科学
人工智能
物理
量子力学
纯数学
数学
作者
Wiebke Hammerschmidt,Holger Sennhenn‐Reulen,Annekathrin Schacht
出处
期刊:NeuroImage
[Elsevier]
日期:2017-08-01
卷期号:156: 466-474
被引量:41
标识
DOI:10.1016/j.neuroimage.2017.04.032
摘要
Facial expressions of emotion have an undeniable processing advantage over neutral faces, discernible both at behavioral level and in emotion-related modulations of several event-related potentials (ERPs). Recently it was proposed that also inherently neutral stimuli might gain salience through associative learning mechanisms. The present study investigated whether acquired motivational salience leads to processing advantages similar to biologically determined origins of inherent emotional salience by applying an associative learning paradigm to human face processing. Participants (N=24) were trained to categorize neutral faces to salience categories by receiving different monetary outcomes. ERPs were recorded in a subsequent test phase consisting of gender decisions on previously associated faces, as well as on familiarized and novel faces expressing happy, angry or no emotion. Previously reward-associated faces boosted the P1 component, indicating that acquired reward-associations modulate early sensory processing in extrastriate visual cortex. However, ERP modulations to emotional – primarily angry – expressions expanded to subsequent processing stages, as reflected in well-established emotion-related ERPs. The present study offers new evidence that motivational salience associated to inherently neutral stimuli can sharpen sensory encoding but does not obligatorily lead to preferential processing at later stages.
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