奥行運動の知覚における相対運動成分の統合過程

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  • Integration Process of Relative Motion Components for the Perception of Motion-in-depth
  • オクユキ ウンドウ ノ チカク ニ オケル ソウタイ ウンドウ セイブン ノ

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We examined the effects of relative motion components of a stimulus changing size on the aftereffect of motion-in-depth. In experiment 1, we used four moving lines forming a square. In one condition, two pairs of opposing lines moved simultaneously outward or inward (similarity). Whereas, in the other condition, one pair moved outward while the other pair moved inward and vice versa (shear). After adapting to these stimuli, two stationary vertical lines were presented. In the "similarity" condition, the stationary lines were first perceived to be moving in the opposite direction to the moving stimuli, and subsequently perceived to be moving in depth (3D-MAE). In the "shear" condition, however, the 3D-MAE was not induced. In experiment 2, we used two moving lines taken from the upper corner of the stimuli in experiment 1. After adaptation, two right angled lines were presented. Consequently the 3D-MAE was induced in the "similarity" condition, but not in the "shear" condition. These results suggest that our visual system integrates the relative motion components of changing size images for the perception or motion-in-depth.

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