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The present study examined whether the spin of a horizontally translating target in an animation movie modulates the magnitude of forward displacement of a remembered final position of the target. The... rotation of an axis bar corresponding to the diameter of a circular target represented the target's spin. There were three spin conditions: forward, backward, and without spin. The observers had to manually localize the vanished position of the target without eye movements. Experiment 1 showed that forward displacement was larger in the forward spin condition than in the backward spin condition and also confirmed that this modulation of forward displacement by object spin was not due to observers' eye movements. Experiment 2 demonstrated that the modulation of forward displacement was not observed when horizontal translational motion was removed from the stimuli, suggesting that the interaction between the target's spin and the horizontal translational motion is critical. These results indicate that implicit friction due to object spin modulates forward displacement without the involvement of eye movements.続きを見る
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