Attentional capture by visual singletons is mediated by top-down task set: new evidence from the N2pc component.

Attentional capture by visual singletons is mediated by top-down task set: new evidence from the N2pc component.
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视觉单例的注意力捕获是由自上而下的任务集介导的:来自 N2pc 组件的新证据。

DOI:
10.1111/j.1469-8986.2008.00700.x
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发表时间:
2008-11
期刊:
影响因子:
3.7
通讯作者:
Eimer, Martin
Eimer, Martin
中科院分区:
心理学3区
文献类型:
--
作者:
Kiss, Monika;Jolicaeur, Pierre;Dell'Acqua, Roberto;Eimer, Martin

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要调查是否注意捕获由突出的视觉刺激介导的当前任务集,我们测量了N2 PC组件作为视觉搜索过程中的视觉注意的空间轨迹的标记。在每次试验中,一个单一的刺激,可以是一个目标(颜色任务:红色圆圈;形状任务:绿色菱形)或非目标(蓝色圆圈或绿色正方形)之间的均匀干扰(绿色圆圈)。正如注意捕获依赖于任务设置的观点所预测的那样,N2 pc受到任务指令的强烈影响。它是最大的目标,衰减,但仍然可靠地存在于目标尺寸中定义的非目标单例(即使当这些都伴随着一个无关的尺寸单例),和小或不存在的同等显着无关的尺寸单例。结果表明,注意捕获不是一个纯粹的自下而上的现象,而是强烈地由自上而下的任务集决定的。
To investigate whether attentional capture by salient visual stimuli is mediated by current task sets, we measured the N2pc component as a marker of the spatial locus of visual attention during visual search. In each trial, a singleton stimulus that could either be a target (color task: red circle; shape task: green diamond) or a nontarget (blue circle or green square) was presented among uniform distractors (green circles). As predicted by the view that attentional capture is contingent on task set, the N2pc was strongly affected by task instructions. It was maximal for targets, attenuated but still reliably present for nontarget singletons defined in the target dimension (even when these were accompanied by an irrelevant-dimension singleton), and small or absent for equally-salient irrelevant-dimension singletons. Results demonstrate that attentional capture is not a purely bottom-up phenomenon, but is strongly determined by top-down task set.
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