原著論文
サッカード時の刺激変位知覚における刺激サイズの影響
2003 年 15 巻 2 号 p. 69-77
詳細
2003 年 15 巻 2 号 p. 69-77
It is known that the detection threshold of stimulus displacement is higher across saccade than when the eye fixates. In the previous studies only a small-sized stimulus was used. The stimulus size may influence the detection threshold since the peripheral visual field may play an important role for visual field stability. Using mondorian pattern stimuli of various sizes, we measured the detection thresholds of stimulus displacement across saccade. The stimuli subtended 18 deg, 36 deg, 72 deg and 180 deg(a whole visual field). The subject made horizontal right-direction saccades. The stimulus was displaced horizontally during saccade. It was shown that when the stimulus size was large the detection threshold increased, but only for the left-direction. These results imply that the visual system interprets retinal displacement of a large stimulus as saccadic displacement.
