Neural correlates of cross-domain affective priming.
Neural correlates of cross-domain affective priming.
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DOI：
10.1016/j.brainres.2010.03.021
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发表时间：
2010-05-06
期刊：
影响因子：
2.9
通讯作者：
Jiang, Yang
中科院分区：
文献类型：
--
作者：
Zhang, Qin;Li, Xiaohua;Gold, Brian T.;Jiang, Yang
关键词：
情感启动效应的研究大多采用反应时的测量方法，然而，情感启动的神经基础还没有很好地建立。为了了解跨领域情绪刺激的神经相关性，我们获得了事件相关电位（ERP）测量在情感启动任务中使用短SOA（刺激起始时间）条件。两组480个图片-单词对呈现在150 ms或250 ms之间的启动和目标刺激的SOA。参与者决定每个目标词的效价是愉快的还是不愉快的。两种SOA条件下的行为结果与先前的情感启动报告一致，在SOA为150 ms（771与738 ms）和250 ms（765与720 ms）时，不一致对的RT比一致对的RT更长。ERP结果显示，N400效应（与情感处理中的不一致对相关）在SOA为150 ms时发生在头皮前部区域，并且这种效应仅在SOA为250 ms时对头皮上的负面目标词观察到。迟发性正电位（与注意力资源分配相关）在SOA为150 ms时，仅在大脑后部观察到阳性目标词的LPP。我们在非常短的SOA中发现的ERP信号提供了第一个神经证据情感图片可以自动影响情感目标词的评价。
The affective priming effect has mostly been studied using reaction time measures; however, the neural bases of affective priming are not well established. To understand the neural correlates of cross-domain emotional stimuli presented rapidly, we obtained event-related potential (ERP) measures during an affective priming task using short SOA (stimulus onset asynchrony) conditions. Two sets of 480 picture-word pairs were presented at SOAs of either 150 ms or 250 ms between prime and target stimuli. Participants decided whether the valence of each target word was pleasant or unpleasant. Behavioral results from both SOA conditions were consistent with previous reports of affective priming, with longer RTs for incongruent than congruent pairs at SOAs of 150 ms (771 vs. 738 ms) and 250 ms (765 vs. 720 ms). ERP results revealed that the N400 effect (associated with incongruent pairs in affective processing) occurred at anterior scalp regions at an SOA of 150 ms, and this effect was only observed for negative target words across the scalp at an SOA of 250 ms. In contrast, late positive potentials (associated with attentional resource allocation) occurred across the scalp at an SOA of 250 ms. LPPs were only observed for positive target words at posterior parts of the brain at an SOA of 150 ms. Our finding of ERP signatures at very short SOAs provides the first neural evidence that affective pictures can exert an automatic influence on the evaluation of affective target words.
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