仮現運動と眼球活動との関係(2) : 詳細な運動印象の分析

概要

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"We examined the relationships between apparent motion illusion and eye movements. Six subjects were asked to report smoothness, coherence, and dimentionality of long-range apparent motion under instructions of (a) fixating their gaze to a center point of visual field, and (b) shifting their gaze saccadically to a point where the stimulus was presented. Three kinds of eye activities, fixation, saccadic eye movement, and eye blink were identified, and a ratio of successful shifts of their gaze to the stimulus-presented-point to total numbers of eye movement was calculated. Under the instruction of fixating-gaze, estimated smoothness was significantly greater than that under the shifting-gaze when the stimulus onset frequency was 3.0 Hz. Estimated coherence and dimentionality did not differentiate between fixating-gaze and shifting-gaze conditions, showing that coherence increased monotonically and dimentionality varied as inverted U-shape as a function of the onset frequency. The results suggest that eye gazing alters smoothness of apparent motion, and motion perception may be influlenced by the oculomotor control. The mechanism of motion perception is discussed in relation to the present results and recent works."
信州大学の論文
2007-03-15