ATTENTION-BASED MOTION PERCEPTION
ATTENTION-BASED MOTION PERCEPTION
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DOI：
10.1126/science.1523411
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发表时间：
1992-09-11
期刊：
影响因子：
56.9
通讯作者：
CAVANAGH, P
中科院分区：
文献类型：
--
作者：
CAVANAGH, P
两个“专注的”跟踪任务揭示了一个基于注意力的运动过程的存在。在第一个任务中，反向旋转的亮度和颜色光栅叠加在一起。由于彩色光栅的遮挡作用，亮度光栅的条纹不可见；然而，它们的运动是可见的，它决定了刺激旋转的感知方向。另一方面，彩色光栅的条纹是可见的，但只有当它们被注意力跟踪时，才能看到它们的移动（与整体刺激旋转的方向相反）。在第二项任务中，颜色光栅的感知速度在亮度相等时通常是缓慢的，但当仔细跟踪单个条纹时，速度就会加快。这些发现证明了两种独立的运动过程：一种是“低水平”或自动的，即使在没有注意刺激的情况下也会发出运动信号；另一种是由对可见特征的注意所介导的，并提供独立于被跟踪特征的准确速度判断。
Two "attentive" tracking tasks reveal the existence of an attention-based motion process. In the first task, oppositely rotating luminance and color gratings were superimposed. Because of masking from the color grating, the bars of the luminance grating were not visible; nevertheless, their motion was visible and it determined the perceived direction of the stimulus rotation. On the other hand, the bars of the color grating were visible but they could only be seen to move (in the opposite direction to the overall stimulus rotation) when they were tracked with attention. In a second task, the perceived velocity of a color grating, typically slow at equiluminance, speeded up when individual bars were attentively tracked. These findings demonstrate two independent motion processes: one that is "low-level" or automatic in that it signals motion even in the absence of attention to the stimulus, and one that is mediated by attention to visible features and provides accurate velocity judgments independently of the features being tracked.