Age-related changes of eye-hand coordination using static and dynamic tasks

• Main Authors: Hui-ChuangChang, 張惠娟
• Other Authors: Fu-Zen Shaw
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/35580483429124618250

碩士 === 國立成功大學 === 認知科學研究所 === 98 === Eye-hand coordination, such as grasping an object or writing, is importantly and frequently used in our daily life. Previous studies, which emphasize on static condition in multiple dimensions, have indicated an age-dependent change existing in numerous visuomotor performance. However, age-dependent alteration in static and dynamic tasks remains largely unknown. In this study, two static tasks in 1D and 2D space and one dynamic task in 1D space were carried out in three age groups, i.e., preschool children, college students and elders. And we found that participants who have high score of digit symbol substitution test (DSST), related to visuomotor processing ability, performed better reaction time (RT) and movement time (MT). In general, college students showed best performance in terms of accuracy, reaction time (RT), movement time (MT), trajectory performance, peak velocity, and time to peak velocity in all tasks. In the analysis of trajectory, college student performed smoother pathway and the endpoints are more convergent. According to the result of trajectory variability, we thought visuomotor ability could be assessed through peak velocity (PV), time to peak velocity (time to PV), and the amount of submovement. And we have another task is to give additional visual cue to know whether the cue would benefit the trajectory performance. The results show that PV and the amount of submovement significantly increased, and both time to PV and MT decreased. Our findings indicate that age affects the visuomotor performance of both static and dynamic tasks in different ways. And giving additional visual cue may improve the motor performance.