The initial stage of visual selection is controlled by top-down task set: new ERP evidence
The initial stage of visual selection is controlled by top-down task set: new ERP evidence
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DOI：
10.3758/s13414-010-0008-3
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发表时间：
2011-01-01
影响因子：
1.7
通讯作者：
Eimer, Martin
中科院分区：
文献类型：
--
作者：
Ansorge, Ulrich;Kiss, Monika;Eimer, Martin
显着的视觉单例刺激产生的空间提示效应，只有当他们匹配当前的任务集，表明注意捕捉是受自上而下的控制。然而，这种任务集的偶然捕获效应可能与自上而下的控制脱离注意力从不匹配的刺激，遵循他们最初的自下而上的显着性驱动的选择。使用N2 pc成分作为注意力捕获的事件相关潜在标记，我们证明自上而下的任务集已经控制了在任何后续注意力脱离之前对显着视觉单例刺激的初始快速选择。这些发现为自上而下的控制在注意捕获中的重要性超过自下而上的显著性提供了新的证据。
Salient visual singleton stimuli produce spatial cueing effects indicative of attentional capture only when they match current task sets, suggesting that capture is subject to top-down control. However, such task-set contingent capture effects could be associated with the top-down controlled disengagement of attention from non-matching stimuli that follows their initial bottom-up salience-driven selection. Using the N2pc component as an event-related potential marker of attentional capture, we demonstrate that top-down task set already controls the initial rapid selection of salient visual singleton stimuli prior to any subsequent attentional disengagement. These findings provide new evidence for the primacy of top-down control over bottom-up salience in attentional capture.