TY - JOUR
T1 - Visual grouping by motion precedes the relative localization between moving and flashed stimuli
AU - Watanabe, Katsumi
PY - 2004/6
Y1 - 2004/6
N2 - 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.
AB - 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.
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U2 - 10.1037/0096-1523.30.3.504
DO - 10.1037/0096-1523.30.3.504
M3 - Article
C2 - 15161382
AN - SCOPUS:2642576432
VL - 30
SP - 504
EP - 512
JO - Journal of Experimental Psychology: Human Perception and Performance
JF - Journal of Experimental Psychology: Human Perception and Performance
SN - 0096-1523
IS - 3
ER -