시각적 착시에 의한 지각된 난이도 변화가 동작 수행에 미치는 영향

초록

Purpose: The purpose of this study was to investigate how the perceived difficulty change by visual illusion affects performance. Methods: Participants in this study consisted of 8 persons (6 males and 2 females) with normal or corrected vision, with the dominant hand on the right. Participants performed verbal judgment tasks, judgment motor tasks, and continuous motor tasks. Inverted-T figures with difficulty levels of 5 cm, 10 cm, and 20 cm were randomly presented for each task. The verbal judgment task was designed to express the shape of a horizontal line and a vertical line that looked long after showing the figure. Judgment motor task was to measure to present the distance between the horizontal line and the vertical line by opening the tip of the stick’s markers. Continuous motor task was to tap a given target 40 times with maximum speed. Results: As a result of the verbal judgement task, all eight participants said that the vertical line was long. In the judgment motor task, five participants judged that the vertical line was longer than the horizontal line. Conversely, three participants stated that the horizontal line was longer than the vertical line. In the continuous motor task, the visual illusion did not appear to affect the continuous movement. On the other hand, as the difficulty index increased, movement time was increased. Conclusion: The vertical line of Inverted-T was perceived as longer one in the perceptual judgement task, but no difference was found in continuous motor task between horizontal line and vertical line of Inverted-T, suggesting that visual illusion of inverted-T did not affect the motor performance of continuous motor task.

키워드