Eye tracking and physiological reactivity to threatening stimuli in posttraumatic stress disorder
Eye tracking and physiological reactivity to threatening stimuli in posttraumatic stress disorder
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DOI：
10.1016/j.janxdis.2011.02.010
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发表时间：
2011-06-01
影响因子：
10.3
通讯作者：
Bryant, Richard A.
中科院分区：
文献类型：
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作者：
Felmingham, Kim L.;Rennie, Chris;Bryant, Richard A.
本研究测试了创伤后应激障碍（PTSD）中焦虑和注意偏差的警惕-回避模型。这项研究使用眼动追踪技术来记录初始注视、瞳孔扩张、注视时间和并发皮肤电导反应，以检查对威胁刺激的初始定向和随后的注视。 21 名遭受创伤的参与者（11 名被诊断患有 PTSD 的参与者和 10 名没有经历过创伤后应激障碍的参与者）观看了 32 个刺激（每个象限有四个单词）。 16 项试验在一个象限中包含一个与创伤相关的词，16 项试验包含四个中性词。创伤后应激障碍（PTSD）患者报告称，对创伤词语的初始注视数量显着增加，对初始威胁注视的皮肤电导反应数量显着增加。各组之间随后对创伤词的固定没有显着差异。尽管这项研究提供了对威胁的注意力偏向伴随着特定的自主神经唤醒的证据，但它并不表明 PTSD 患者随后会回避威胁刺激。 (C) 2011 Elsevier Ltd. 保留所有权利。
This study tested the vigilance-avoidance model of anxiety and attention bias in posttraumatic stress disorder (PTSD). This study used eye tracking technology to record initial fixations, pupil dilation, fixation time and concurrent skin conductance response to examine initial orienting towards threat stimuli and subsequent fixations. Twenty-one traumatized participants (11 diagnosed with PTSD and 10 trauma-exposed participants without PTSD) viewed 32 stimuli (with four words in each quadrant). Sixteen trials contained a trauma-relevant word in one quadrant and 16 had four neutral words. PTSD patients reported significantly greater number of initial fixations to trauma words, and a greater number of skin conductance responses to initial threat fixations. There were no significant differences in subsequent fixations to trauma words between groups. Although this study provides evidence of attentional bias towards threat that is accompanied by specific autonomic arousal, it does not indicate subsequent avoidance of threat stimuli in PTSD. (C) 2011 Elsevier Ltd. All rights reserved.