Out of sight, but still in mind: Electrocortical correlates of attentional capture in spider phobia as revealed by a 'dot probe' paradigm
Out of sight, but still in mind: Electrocortical correlates of attentional capture in spider phobia as revealed by a 'dot probe' paradigm
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DOI：
10.1016/j.bandc.2014.11.005
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发表时间：
2015-02-01
影响因子：
2.5
通讯作者：
Schienle, Anne
中科院分区：
文献类型：
--
作者：
Leutgeb, Verena;Sarlo, Michela;Schienle, Anne
目前的研究集中在蜘蛛恐惧症的注意过程。20名恐惧症患者和20名对照者进行了点探测任务，同时记录了事件相关电位。在每一次试验中，（蜘蛛或与中性图片配对的通常引起厌恶的图片）持续100或1500 ms。被呈现在情绪相关或中性幻灯片的先前位置，并且要求参与者通过按下按钮来指示该点是呈现在左侧还是左侧。屏幕右侧。结果表明，调制的中央-顶叶P300（图片开始后340-500毫秒）。当圆点代替蜘蛛时，振幅比代替中性图片时要高。这是恐惧症特有的，因为它只存在于恐惧症中，而不会出现在厌恶图片中。此外，调制只能在短的呈现时间内显示。结果被解释为反映动机注意蜘蛛恐惧症，如果障碍相关和中性的图片同时显示。由于P300的调制被发现后，图片偏移，注意分配似乎是持久的恐惧对象后，不再存在。(C)2014爱思唯尔公司All rights reserved.
The current investigation focused on attentional processes in spider phobia. Twenty phobics and 20 controls performed a dot-probe task while event-related potentials were recorded. In each trial they viewed a picture pair (a spider or a generally disgust eliciting picture that was paired with a neutral picture) for either 100 or 1500 ms. After the offset a visual probe (a dot) was presented either at the previous position of the emotionally relevant or the neutral slide and participants were asked to indicate with a button press whether the dot had been presented on the left or the right side of the screen. Results revealed a modulation of the centro-parietal P300 (340-500 ms after picture onset). Amplitudes were higher when the dot replaced a spider than when it replaced a neutral picture. This was phobia-specific, as it was only present in phobics and did not appear in response to disgust pictures. Moreover, the modulation could only be shown for short presentation times. The results are interpreted to reflect motivated attention in spider phobia, if disorder-relevant and neutral pictures are shown simultaneously. As the modulation of the P300 was found after picture offset, attentional allocation seems to be persist after the phobic object is no longer present. (C) 2014 Elsevier Inc. All rights reserved.