Gerdes Antje B M, Pauli Paul, Alpers Georg W
Department of Psychology, University of Würzburg, Marcusstrasse 9-11, 97070 Würzburg, Germany.
J Neural Transm (Vienna). 2009 Jun;116(6):725-33. doi: 10.1007/s00702-008-0167-8. Epub 2009 Jan 21.
Highly fearful individuals show attentional biases toward threat. However, it is still unclear whether initial engagement of attention toward threat or difficulties to disengage from threat is the underlying mechanism. We used eye-tracking to investigate how quickly fear-relevant pictures are identified and whether they distract from the allocation of attention toward neutral targets. Pairs of fear-relevant and neutral pictures were presented to 18 high and 16 low spider-fearful participants. They were instructed to either fixate on a target or to fixate on the opposite picture, while eye movements were monitored continuously. Overall, fear-relevant targets were fixated more quickly than neutral targets. Spider-fearful participants had longer latencies when they had to identify the fear-relevant but fixate the neutral picture. Thus, attentional allocation toward threat was not specifically enhanced in fearful participants. Instead, they had difficulties to disengage attention from fear-relevant information. This disengagement deficit could be a cause, a correlate, or the result of phobic fear.
高度恐惧的个体对威胁表现出注意偏向。然而,对威胁的注意最初是被吸引还是难以从威胁上脱离才是潜在机制仍不清楚。我们使用眼动追踪技术来研究与恐惧相关的图片被识别的速度有多快,以及它们是否会分散对中性目标的注意力分配。向18名高度害怕蜘蛛和16名低度害怕蜘蛛的参与者展示成对的与恐惧相关和中性的图片。他们被指示要么注视一个目标,要么注视相反的图片,同时持续监测眼动。总体而言,与恐惧相关的目标比中性目标被更快地注视。当必须识别与恐惧相关但要注视中性图片时,害怕蜘蛛的参与者有更长的反应时。因此,恐惧的参与者对威胁的注意力分配并没有特别增强。相反,他们难以将注意力从与恐惧相关的信息上脱离。这种脱离缺陷可能是恐惧症恐惧的一个原因、相关因素或结果。