The time course of the influence of valence and arousal on the implicit processing of affective pictures.
The time course of the influence of valence and arousal on the implicit processing of affective pictures.
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效价和唤醒对情感图片内隐加工影响的时间进程
DOI：
10.1371/journal.pone.0029668
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Luo YJ
中科院分区：
文献类型：
--
作者：
Feng C;Wang L;Liu C;Zhu X;Dai R;Mai X;Luo YJ
在本研究中，我们采用唤醒度（低与高）的效价（负与正）正交设计考察了情感图片内隐加工的时间进程。以往的外显任务研究表明，效价主要调节事件相关电位（ERP）的早期成分，而唤醒主要调节晚期成分。然而，在本研究中，我们观察到显着的交互作用，在早期和晚期阶段在顶叶和额叶的网站，这是反映了三个不同的ERP成分：P2 a（100-200 ms），N2（200-300 ms），和P3（300-400 ms）。此外，在顶枕部位，觉醒对P2b（200-300 ms）也有显著的主效应。我们的研究结果表明，效价和唤醒效应的内隐情感处理是更复杂的比以往的ERP研究与外显任务揭示。
In the current study, we investigated the time course of the implicit processing of affective pictures with an orthogonal design of valence (negative vs. positive) by arousal (low vs. high). Previous studies with explicit tasks suggested that valence mainly modulates early event-related potential (ERP) components, whereas arousal mainly modulates late components. However, in this study with an implicit task, we observed significant interactions between valence and arousal at both early and late stages over both parietal and frontal sites, which were reflected by three different ERP components: P2a (100–200 ms), N2 (200–300 ms), and P3 (300–400 ms). Furthermore, there was also a significant main effect of arousal on P2b (200–300 ms) over parieto-occipital sites. Our results suggest that valence and arousal effects on implicit affective processing are more complicated than previous ERP studies with explicit tasks have revealed.