A facial electromyographic investigation of affective contrast.
A facial electromyographic investigation of affective contrast.
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DOI：
10.1111/j.1469-8986.2009.00820.x
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发表时间：
2009-07
期刊：
影响因子：
3.7
通讯作者：
Jeff T. Larsen;J. Ian Norris
中科院分区：
文献类型：
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作者：
Jeff T. Larsen;J. Ian Norris
情感对比指的是当刺激被更能引起共鸣的同价刺激引导时，刺激被判断为不那么能引起共鸣的倾向。作者使用皱眉肌的面部肌电图（EMG）活动，这与情感效价呈负相关，以确定背景是否影响潜在的情感反应。在实验1中，适度愉快的图片引起较少的活动皱眉肌时，他们被嵌入在轻度愉快，而不是非常愉快，图片。在实验2中，当适度愉快的图片被嵌入到适度的价格（即，愉快和不愉快的），而不是极端的价值，图片;中度不愉快的图片引起可比的EMG活动，无论上下文。结果表明，背景可以影响情感反应的基础上的情感判断适度愉快的刺激。
Affective contrast refers to the tendency for stimuli to be judged as less evocative when preceded by more evocative same-valence stimuli. The authors used facial electromyographic (EMG) activity over corrugator supercilii, which is inversely related to affective valence, to determine if context influences underlying affective reactions. In Experiment 1, moderately pleasant pictures elicited less activity over corrugator supercilii when they were embedded among mildly pleasant, as opposed to extremely pleasant, pictures. In Experiment 2, moderately pleasant pictures elicited less activity over corrugator supercilii when they were embedded among mildly valent (i.e., pleasant and unpleasant), as opposed to extremely valent, pictures; moderately unpleasant pictures elicited comparable EMG activity regardless of context. Results indicate that context can influence affective reactions underlying affective judgments of moderately pleasant stimuli.