Time course of attentional bias to emotional scenes in anxiety: Gaze direction and duration
Time course of attentional bias to emotional scenes in anxiety: Gaze direction and duration
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DOI：
10.1080/02699930441000157
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发表时间：
2005-01-01
影响因子：
2.6
通讯作者：
Avero, P
中科院分区：
文献类型：
--
作者：
Calvo, MG;Avero, P
情绪中性、积极和消极（与威胁或伤害相关）场景的图片呈现 3 秒，并与非情绪控制图片配对。监测高和低特质焦虑参与者的注视情况。刺激情绪的强度各不相同，每张图片都有两个感知显着性级别（彩色与灰度）。无论知觉显着性如何，高度焦虑都与优先注意相关：（a）在初始定向中对所有类型的情感刺激的关注，这可以通过首先固定在情感图片上的概率高于一对中性图片来揭示； (b) 在早期参与的后续阶段中朝向积极和有害的刺激，如图片出现后的前 500 毫秒内较长的观看时间所示； (c) 在后期阶段注意力远离（即避免）伤害刺激，如图片曝光的最后 1000 毫秒期间较短的观看时间和较低的注视频率所示。这表明注意力偏差的性质随着情感图片处理的时间过程而变化。
Pictures of emotionally neutral, positive, and negative (threat- or harm-related) scenes were presented for 3 seconds, paired with nonemotional control pictures. The eye fixations of high and low trait anxiety participants were monitored. Intensity of stimulus emotionality was varied, with two levels of perceptual salience for each picture (colour vs. greyscale). Regardless of perceptual salience, high anxiety was associated with preferential attention: (a) towards all types of emotional stimuli in initial orienting, as revealed by a higher probability of first fixation on the emotional picture than on the neutral picture of a pair; (b) towards positive and harm stimuli in a subsequent stage of early engagement, as shown by longer viewing times during the first 500 ms following onset of the pictures; and with (c) attention away from (i.e., avoidance) harm stimuli in a later phase, as indicated by shorter viewing times and lower frequency of fixation during the last 1000 ms of picture exposure. This suggests that the nature of the attentional bias varies as a function of the time course in the processing of emotional pictures.