Effects of Task Complexity on Reaching Kinematics: A Pilot Study

活動複雜度對伸展動作之動量表現的效應

馬慧英(Hui-ing Ma) ； 吳菁宜(Ching-Yi Wu)

《職能治療學會雜誌》 16卷 (1998/09) Pp. 25-36

https://doi.org/10.6594/JTOTA.1998.16.02

摘要

活動複雜度常是職能治療師作活動分析時考慮的重要項目之一。本篇主旨在探討活動複雜度對伸展動作的影響，並以動量變項來叙述動作的改變。活動複雜度的操控涉及動作步驟數目之多寡。此研究使用重複施測之設計，樣本包括六位健康成年人。每位施測者接受三種實驗狀況：高複雜度之活動（拿起電話筒並撥一電話號碼）、中等複雜度之活動（將電話筒拿至耳邊），和低複雜度之活動（只拿起電話筒）。實驗結果顯示，相對於中等複雜度和低複雜度的活動，高複雜度的活動誘發較慢、運動軌跡較不成直線的動作，此發現顯示使用低複雜度之功能活動可能獲致較高的動作效率和較近線性的動作軌跡。文末以此研究的限制，及該領域值得進一步探討之課題作總結。

關鍵字

活動複雜度 ； 活動分析 ； 動量分析

並列摘要

Task complexity is an important factor to consider in activity analysis. This study aimed at investigating the effect of task complexity on reaching performance using kinematic analysis. Task complexity was varied by changing the number of motor steps. Using a repeated-measures counterbalanced design, six healthy adults performed a telephone task under three experimental conditions: A higher level of task complexity (picking up a telephone receiver and dialing a phone number), a moderate level of task complexity (picking up a receiver and bringing it to the ear to listen), and a lower level of task complexity (picking up a receiver). The reaching performance was measured by the OPTOTRAK motion analysis system.
Results showed that the task with higher complexity elicited a slower, less direct reaching movement as compared with the tasks with moderate and lower complexity. These findings suggested that functional tasks with less complexity could influence movement efficiency and directness. Recommendations for future research were provided.

並列關鍵字

task complexity ； activity analysis ； movement kinematics