On the role of selective attention in visual perception
On the role of selective attention in visual perception
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DOI：
10.1073/pnas.95.3.825
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发表时间：
1998-02-03
影响因子：
11.1
通讯作者：
Ford, MA
中科院分区：
文献类型：
--
作者：
Luck, SJ;Ford, MA
选择性注意在视觉感知中的作用是什么？在回答这个问题之前，有必要区分影响刺激识别的注意机制和在知觉完成后操作的注意机制。认知神经科学技术特别适合于做出这种区分，因为它们允许从时间和/或神经解剖学的角度分离不同的注意机制。本文描述了这些技术在区分知觉和知觉后注意机制中的使用，然后提出了注意在视觉知觉中的具体作用。具体地说，提出了注意解决当同时处理多个对象时在神经编码中出现的歧义，这一假设的证据由两个实验提供，该实验表明，只有在预计将导致模糊神经编码的条件下，才将电生理测量的注意力分配给视觉搜索目标。
What is the role of selective attention in visual perception? Before answering this question, it is necessary to differentiate between attentional mechanisms that influence the identification of a stimulus from those that operate after perception is complete, Cognitive neuroscience techniques are particularly well suited to making this distinction because they allow different attentional mechanisms to be isolated in terms of timing and/or neuroanatomy, The present article describes the use of these techniques in differentiating between perceptual and postperceptual attentional mechanisms and then proposes a specific role of attention in visual perception. Specifically, attention is proposed to resolve ambiguities in neural coding that arise when multiple objects are processed simultaneously, Evidence for this hypothesis is provided by two experiments showing that attention-as measured electrophysiologically-is allocated to visual search targets only under conditions that would be expected to lead to ambiguous neural coding.