Visual grouping by motion precedes the relative localization between moving and flashed stimuli.
Visual grouping by motion precedes the relative localization between moving and flashed stimuli.
复制标题
按运动进行视觉分组先于移动刺激和闪烁刺激之间的相对定位。
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Katsumi Watanabe
中科院分区：
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作者：
Katsumi Watanabe;Katsumi Watanabe
当它们在空间上对齐时，闪烁的刺激被感知为在空间上滞后于移动的刺激。当几个元素被感知地分组为单一的移动对象时，在移动刺激的前沿处呈现的闪光比在后沿处呈现的闪光遭受更大的空间滞后（K。渡边R.尼杰万B。Khurana，& S.下条2001年）。本研究通过对闪光起始点相对于运动起始点的操纵，考察了视觉运动分组和相对视觉定位的知觉操作顺序。结果发现，观察到的不对称的错位，而不管物理和/或感知的时间顺序之间的运动和闪光发作。因此，在视觉系统明确表示运动和闪光刺激的相对位置之前，必须完成运动分组以定义运动对象中的前导-尾随关系。
A flashed stimulus is perceived as spatially lagging behind a moving stimulus when they are spatially aligned. When several elements are perceptually grouped into a unitary moving object, a flash presented at the leading edge of the moving stimulus suffers a larger spatial lag than a flash presented at the trailing edge (K. Watanabe. R. Nijhawan. B. Khurana, & S. Shimojo. 2001). By manipulation of the flash onset relative to the motion onset, the present study investigated the order of perceptual operations of visual motion grouping and relative visual localization. It was found that the asymmetric mislocalization was observed irrespective of physical and/or perceptual temporal order between the motion and flash onsets. Thus, grouping by motion must be completed to define the leading-trailing relation in a moving object before the visual system explicitly represents the relative positions of moving and flashed stimuli.