시각 피드백이 조준운동의 제어에 미치는 영향 = The Effects of Visual Feedback on Control of Aiming Movements

다국어 초록 (Multilingual Abstract)

The purpose of this study was to investigate the effects of visual feedback on control of aiming movements. Four experiments were conducted in order to test the minimum visual feedback processing time, the role of visual feedback and the effects of movement distance and movement time on visual feedback processing. Experiment 1 was designed to examine the minimum visual feedback processing time. Subjects for the Experiment 1 were 10 males, 28 years old on the average. The task in Experiment 1 was single target aiming with stylus. The movement distance was help constant at 35㎝. Experiment 1 was performed in a 3×52-factors within subject design. Experiment 2 was designed to examine the role of visual feedback in movement phase. Subjects for the Experiment 2 were 10 males, 34years old on the average. The task in Experiment 2 was single target aiming, with movement distance held at 40㎝. Experiment 2 was performed in a single factor within-subject design. Experiment 3 was designed to examine the role of visual feedback in movement phase. Subjects for the Experiment 3 were 10 males, 34 years old on the average. The task of Experiment 3 was the same as Experiment 1, but under four visual feedback conditions. The movement distance was held constant at 30㎝. Experiment 4 was designed to examine the the effects of movement distances (20㎝, 40㎝) and movement times (150㎳, 300㎳, 450㎳) on visual feedback processing. Subjects for the Experiment 4 were 10 males, 32 years old on the average. The task in experiment 4 was the same as in Experiment 1. Experiment 4 was performed with a 2×2×3 3-factor within-subject design. The results of the study are as the followings: 1. The time required to process visual feedback was below 200㎳. 2. Visual feedback was more important for the distance error at the final phase than at the initial phase of the movements. 3. Visual feedback was more important for the dirrection error at the initial phase than at the final phase of movements. 4. The differences in movement errors between light-on light-off conditions at the 150-300 ㎳ movement time were constant, while the difference at the 450㎳ movement time increased. The tendency was stronger in 40㎝ movement distance than in 20㎝ movement distance.