Affective reactions to briefly presented pictures
Affective reactions to briefly presented pictures
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DOI：
10.1017/s004857720198028x
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发表时间：
2001-05-01
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：
Codispoti, M;Bradley, MM;Lang, PJ
对短暂呈现的图片的情感反应进行了调查，以确定短暂的刺激是否参与了调节情绪反应的动机系统。呈现情绪图片和中性图片的时间为500ms：心率、皮肤电导率。波纹肌电信号。并测量诱发的惊厥反射。反射调制的时间进程类似于较长时间(6个S)的呈现，这表明在没有感觉刺激的情况下，图像处理仍在继续。更持久的呈现也获得了情感反应，不愉快的图片有更多的皱纹肌电活动，情绪图片有更大的皮肤电导反应。然而，心率调节。似乎依赖于感官刺激的存在。数据还表明，与持续呈现相比，短暂呈现令人不快的图片可能会导致更少的防御性激活。
Affective reactions to briefly presented pictures were investigated to determine whether fleeting stimuli engage the motivational systems mediating emotional responses. Emotional and neutral pictures were presented for 500 ms: heart rate, skin conductance. corrugator EMG. and the evoked startle reflex were measured. The time course of reflex modulation was similar to that obtained with longer (6 s) presentations, suggesting that picture processing continues in the absence of a sensory stimulus. Affective reactions found with more sustained presentation were also obtained, with more corrugator EMG activity for unpleasant pictures, and greater skin conductance reactivity for emotional pictures. Heart rate modulation, however. appears to rely on the presence of a sensory stimulus. The data also suggest that brief presentations of unpleasant pictures may result in less defensive activation than sustained presentation.