Affective picture processing: The late positive potential is modulated by motivational relevance
Affective picture processing: The late positive potential is modulated by motivational relevance
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DOI：
10.1111/1469-8986.3720257
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发表时间：
2000-03-01
期刊：
影响因子：
3.7
通讯作者：
Lang, PJ
中科院分区：
文献类型：
--
作者：
Schupp, HT;Cuthbert, BN;Lang, PJ
最近的研究表明，事件相关电位（ERP）的后期积极成分增强的情绪图片，在一个古怪的范式，评价为远离一个既定的情感背景。在其他研究中，与上下文无关，随机呈现，情感强烈的图片（愉快的和不愉快的）促使类似的增强ERP后期积极性（与中性图片反应相比）。为了协调对晚期正电位（LPP）的解释，对随机排列的图片进行了ERP评估，但使用了更快的呈现速率，短暂的曝光（1.5秒）和六张图片的不同序列，就像在使用基于评估距离的奇数的研究中一样。结果再次显示，与中性图片相比，愉快和不愉快的图片具有更大的LPP。此外，高唤醒的情感图片比情感强度较低的图片引起更大的LPP。数据支持的观点，后期积极情绪的图片调制的内在动机意义和图片呈现的评价背景。
Recent studies have shown that the late positive component of the event-related-potential (ERP) is enhanced for emotional pictures, presented in an oddball paradigm, evaluated as distant from an established affective context. In other research, with context-free, random presentation, affectively intense pictures (pleasant and unpleasant) prompted similar enhanced ERP late positivity (compared with the neutral picture response). In an effort to reconcile interpretations of the late positive potential (LPP), ERPs to randomly ordered pictures were assessed, but using the faster presentation rate, brief exposure (1.5 s), and distinct sequences of six pictures, as in studies using an oddball based on evaluative distance. Again, results showed larger LPPs to pleasant and unpleasant pictures, compared with neutral pictures. Furthermore, affective pictures of high arousal elicited larger LPPs than less affectively intense pictures. The data support the view that late positivity to affective pictures is modulated both by their intrinsic motivational significance and the evaluative context of picture presentation.