Behavioral and ERP measures of attentional bias to threat in the dot-probe task: poor reliability and lack of correlation with anxiety.
Behavioral and ERP measures of attentional bias to threat in the dot-probe task: poor reliability and lack of correlation with anxiety.
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DOI：
10.3389/fpsyg.2014.01368
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发表时间：
2014
影响因子：
3.8
通讯作者：
Proudfit GH
中科院分区：
文献类型：
--
作者：
Kappenman ES;Farrens JL;Luck SJ;Proudfit GH
点探测任务通常被认为是研究威胁注意偏向的金标准。然而，这项任务的严重问题已经提出。具体而言，许多研究表明，传统的反应时（RT）测量点探测任务中的注意偏向威胁的内部信度和重测信度差。此外，虽然威胁刺激捕获注意在其他范式，注意偏向的威胁通常没有被发现在典型的研究参与者在点探测任务。然而，当在点探测任务与事件相关电位波形的N2pc组件测量注意时，观察到大量的注意定向到威胁，内部可靠性是中等的。为了提供一个严格的比较，这N2PC措施和传统的行为措施的可靠性，以及检查这些措施的关系，焦虑，本研究探讨了N2PC与RT在点探测任务中的大样本的参与者（N = 96）。与以前的研究一样，RT在样本中对威胁性图像没有偏倚，内部可靠性较差。此外，这项措施没有涉及特质焦虑。相比之下，N2PC揭示了对威胁的关注的显著初始转移，并且这种措施是内部可靠的。然而，N2PC与特质焦虑不相关，这表明它不能提供一个有意义的指标，在点探测任务中的焦虑的个体差异。总之，这些结果表明，迫切需要开发新的任务和方法，以更可靠地调查临床和非临床人群中对威胁的注意偏差及其与焦虑的关系。
The dot-probe task is often considered a gold standard in the field for investigating attentional bias to threat. However, serious issues with the task have been raised. Specifically, a number of studies have demonstrated that the traditional reaction time (RT) measure of attentional bias to threat in the dot-probe task has poor internal reliability and poor test-retest reliability. In addition, although threatening stimuli capture attention in other paradigms, attentional bias to threat has not usually been found in typical research participants in the dot-probe task. However, when attention is measured in the dot-probe task with the N2pc component of the event-related potential waveform, substantial attentional orienting to threat is observed, and the internal reliability is moderate. To provide a rigorous comparison of the reliability of this N2pc measure and the conventional behavioral measure, as well as to examine the relationship of these measures to anxiety, the present study examined the N2pc in conjunction with RT in the dot-probe task in a large sample of participants (N = 96). As in previous studies, RT showed no bias to threatening images across the sample and exhibited poor internal reliability. Moreover, this measure did not relate to trait anxiety. By contrast, the N2pc revealed a significant initial shift of attention to threat, and this measure was internally reliable. However, the N2pc was not correlated with trait anxiety, indicating that it does not provide a meaningful index of individual differences in anxiety in the dot-probe task. Together, these results indicate a serious need to develop new tasks and methods to more reliably investigate attentional bias to threat and its relationship to anxiety in both clinical and non-clinical populations.
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