以「任務歷程結合動作指標的游標操作評量」形成策略來改善游標操作

The Effects of Cursor Control Strategies Based on Assessment of the Combined Tasks and Movement Analyses

肢體障礙者無法有效率地執行游標操作，此困難依不同動作障礙特質可能發生於游標操作任務的特定歷程，但尚未有文獻依照不同歷程，同時考量該歷程的動作需求進行評量並引導介入，本研究因此設計「任務歷程結合動作指標的游標操作評量」來引導介入。研究共招募20位肢體障礙者執行游標操作網頁的任務，先確認個案於某歷程的動作困難，再形成可及性策略，並與原先策略進行比較。實驗採取交叉設計，並採取魏克森符號等級檢定法進行兩種策略的組內比較，結果發現肢體障礙者使用新的可及性策略時，於操作效率、錯誤次數與嘗試次數比原先策略有顯著進步。因此經由「任務歷程結合動作指標的游標操作評量」除能反映個案能力外，更貼近生態情境的動作特質，也能較精確的引導出符合需求的介入。

Persons with physical impairment were unable to operate the general computer well because of inefficient cursor control. Therefore, the mouse and cursor control assessment based on the concept of the activity analysis were developed in this study. The assessment for the health professionals to accurately find out the problems of the cursor movement while physically impaired persons perform a website-browsing, helps form a adaptive strategy to improve the efficiency of the cursor control. The pre-post comparative crossover design for group research were used to evaluate the effects of the new access adaptive strategy. Twenty physically disabled participants were enrolled in this study. Two counterbalanced experimental sessions of either the new strategy or the original strategy across participants were arranged based on the principle of crossover design. The Wilcoxon signed-rank test was applied to compare the results between the new strategy and the original strategy in the performances of cursor control. The efficiency, the number of error times and the number of trials of the dependent variables showed significant differences during the applications of the original and new access adaptive strategy to the physically-impaired group. By means of the assessment of the combination of the multi-step tasks and the indicators of the cursor control, we found out the problem of the activity of the cursor operation and the error type. Meanwhile, the characteristics of the motor pattern reflect in the performance of the cursor movement in the ecological context, guiding the practitioners to form the strategy for these clients.