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The role of feature-specific task set and bottom-up salience in attentional capture: an ERP study

机译:功能特定的任务集和自下而上的显着性在注意力捕获中的作用:一项ERP研究

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摘要

We investigated the roles of top-down task set and bottom-up stimulus salience for feature-specific attentional capture. Spatially nonpredictive cues preceded search arrays that included a color-defined target. For target-color singleton cues, behavioral spatial cueing effects were accompanied by cue-induced N2pc components, indicative of attentional capture. These effects were only minimally attenuated for nonsingleton target-color cues, underlining the dominance of top-down task set over salience in attentional capture. Nontarget-color singleton cues triggered no N2pc, but instead an anterior N2 component indicative of top-down inhibition. In Experiment 2, inverted behavioral cueing effects of these cues were accompanied by a delayed N2pc to targets at cued locations, suggesting that perceptually salient but task-irrelevant visual events trigger location-specific inhibition mechanisms that can delay subsequent target selection.
机译:我们调查了自上而下的任务集和自下而上的刺激显着性在特定于功能的注意捕获中的作用。空间不可预测的线索位于包含颜色定义的目标的搜索数组之前。对于目标色单例线索,行为空间线索效应伴随着线索诱导的N2pc成分,表明注意力被捕获。对于非单一目标色提示,这些影响仅被最小程度地减弱,从而强调了自上而下的任务集对注意力捕获的显着性的支配性。非目标颜色的单例提示没有触发N2pc,而是触发了一个自上而下的抑制作用的前N2分量。在实验2中,这些提示的反向行为提示效果伴随着N2pc延迟到达提示位置处的目标,这表明在感知上显着但与任务无关的视觉事件触发了位置特定的抑制机制,这可能会延迟后续目标的选择。

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