Brain potentials in perception: Picture complexity and emotional arousal
Brain potentials in perception: Picture complexity and emotional arousal
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DOI：
10.1111/j.1469-8986.2007.00520.x
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发表时间：
2007-05-01
期刊：
影响因子：
3.7
通讯作者：
Lang, Peter J.
中科院分区：
文献类型：
--
作者：
Bradley, Margaret M.;Hamby, Steven;Lang, Peter J.
事件相关电位（ERP）进行了测量，而参与者观看情感唤起和中性的图片描绘简单的图形-背景成分或更复杂的场景，以评估知觉和情绪调节的时间和地形。情绪图片引起了一个更大的晚正电位比中性的图片在400-700毫秒的窗口在中央-顶叶传感器无论是简单的图形-背景组成的图片和更复杂的场景。图片组成影响ERP开始较早（约150毫秒），与简单的图形-背景组成引起较少的正面后传感器和较少的负面正面传感器。行为对这些早期ERP的调制影响不大。这些数据表明，晚中央-顶叶正电位主要反映动机相关性，而早期的后（和前）组件反映，至少部分，在一张图片的知觉组织的差异。
Event-related potentials (ERPs) were measured while participants viewed affectively arousing and neutral pictures depicting either simple figure-ground compositions or more complex scenes to assess the timing and topography of perceptual and emotional modulation. Emotional pictures elicited a larger late positive potential than neutral pictures in a 400-700-ms window over centro-parietal sensors both for pictures with simple figure-ground composition and for more complex scenes. Picture composition affected ERPs beginning earlier (around 150 ms), with simple figure-ground compositions eliciting less positivity over posterior sensors and less negativity over frontal sensors. Emotionality had little effect on modulation of these early ERPs. These data suggest that the late centro-parietal positive potential primarily reflects motivational relevance, and that earlier posterior (and anterior) components reflect, at least in part, differences in a picture's perceptual organization.