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首页> 外文期刊>Journal of vision >How Does Reflexive Visuospatial Attention Speed Target Processing?
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How Does Reflexive Visuospatial Attention Speed Target Processing?

机译：反身探测仪表如何注意速度目标处理？

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摘要

Irrelevant transient stimuli can speed responses to visual targets that appear soon after at the same location (relative to other locations). How do these stimuli speed target processing? Traditionally, they are thought to act as cues that reflexively capture visuospatial attention, a mechanism that provides processing priority to specific regions of the visual field. Here we report behavioral and electrophysiological evidence of the limits of this explanation. In the first experiment we show that while targets are identified faster at a cues locations (the classic cueing effect), this effect is increased when the cue and target are visually similar. Thus, the reflexive cueing effect is not a general attentional enhancement of all visual processing within a region of space; rather, some component of the effect is related to the identity of the cue. In a second experiment we used attentional control settings to manipulate whether cues captured attention or not and measured event-related potentials. Cues that captured attention produced a posterior contralateral positivity between 200 to 400 ms after their onset that was absent when they did not capture attention. This component resembles the Ptc, which has been associated with the resolution of perceptual competition between proximal stimuli. More importantly, a similar component was observed time-locked to the target onset, except when the target appeared at a cued location. Thus cues may speed target processing by inducing competition resolution, making this process unnecessary when the target subsequently appears at that location. These results do not fit well with the notion that reflexive attention is a mechanism deployed to enhance visual processing within regions of space. Instead, the present results suggest that transient stimuli initiate perceptual processing, and subsequent targets can exploit these ongoing processes if, for example, they appear at the same location or are visually similar.
机译：无关瞬态刺激可以加速对在同一位置（相对于其他位置）不久的视觉目标的响应。这些刺激速度如何处理？传统上，他们被认为是以反复捕获探测性注意力的提示，这是一种机制，该机制为视野的特定区域提供了处理优先权。在这里，我们举报了这种解释限制的行为和电生理学证据。在第一个实验中，我们表明，虽然在提示位置（经典提示效应）更快地确定目标时，当提示和目标在视觉上相似时，这种效果会增加。因此，反射的提示效应不是一个空间区域内所有视觉处理的一般注意力;相反，效果的某些组成部分与提示的身份有关。在第二个实验中，我们使用注意力控制设置来操纵线索是否捕获关注和没有测量的事件相关的潜力。捕获注意力在他们未捕捉注意时发病后，捕获注意力的提示在200至400毫秒之间产生了后侧阳性。该组分类似于PTC，该PTC与近端刺激之间的感知竞争的解决有关。更重要的是，除了当目标出现在CUED位置之外，观察到与目标发作的相似分量被锁定到目标发作。因此，提示可以通过诱导竞争分辨率来速度加速目标处理，当目标随后出现在该位置时，使得这种过程使得这种过程是不必要的。这些结果与反身关注的概念不合适，是一种部署的机制，以提高空间区域内的视觉处理。相反，本结果表明，瞬态刺激发起感知处理，并且随后的目标可以利用例如它们在同一位置或视觉上类似的过程中的持续过程。

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