Temporally selective attention modulates early perceptual processing: Event-related potential evidence
Temporally selective attention modulates early perceptual processing: Event-related potential evidence
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DOI：
10.3758/pp.70.4.732
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发表时间：
2008-05-01
期刊：
影响因子：
--
通讯作者：
Astheimer, Lori B.
中科院分区：
文献类型：
--
作者：
Sanders, Lisa D.;Astheimer, Lori B.
我们遇到的一些最重要的信息变化如此之快，以至于我们的感知系统无法详细处理所有这些信息。空间选择性注意是至关重要的知觉时，更多的信息可以处理的细节，同时在不同的位置。当面对复杂、快速变化的信息时，听众可能需要有选择地关注特定的时间，而不是地点。我们提出的证据表明，听众可以直接选择性注意的时间点，相差少至500毫秒，这样做可以提高目标检测，影响基线神经活动之前的刺激介绍，并调制听觉诱发电位在感知的早期阶段。这些数据表明，早期感知处理的注意力调制是时间上精确的，听众可以灵活地分配时间选择性注意力在短时间间隔，使其成为一个可行的机制，优先处理最相关的片段在快速变化的流。
Some of the most important information we encounter changes so rapidly that our perceptual systems cannot process all of it in detail. Spatially selective attention is critical for perception when more information than can be processed in detail is presented simultaneously at distinct locations. When presented with complex, rapidly changing information, listeners may need to selectively attend to specific times rather than to locations. We present evidence that listeners can direct selective attention to time points that differ by as little as 500 msec, and that doing so improves target detection, affects baseline neural activity preceding stimulus presentation, and modulates auditory evoked potentials at a perceptually early stage. These data demonstrate that attentional modulation of early perceptual processing is temporally precise and that listeners can flexibly allocate temporally selective attention over short intervals, making it a viable mechanism for preferentially processing the most relevant segments in rapidly changing streams.