視覺障礙者行動輔具之使用評估

The Usability Study of Travel Aided Devices for the Visually Impaired

李正隆(C. L. Lee) ； 陳智勇(C. Y. Chen) ； 吳欣潔(H. C. Wu)

《人因工程學刊》 10卷1期 (2008/05) Pp. 41-47

https://doi.org/10.6273/JES.2008.10(1).05

摘要

本研究主要在於探討國內視覺障礙者在不同實驗情境下行動輔具的使用評估，包括單獨使用手杖、單獨使用自行研發之電子偵測器、及手杖與偵測器同時使用等三種實驗情境。實驗受測者爲15位台中啟明學校視覺障礙教師及學生，包括4位教師、5位國中學生與6位高中職學生。實驗後並利用問卷進行訪談，藉以瞭解視障者對於行動輔具的使用狀況。結果發現，在不同實驗情境下，視障者在行動速率及碰撞次數具有顯著差異。在手杖與偵測器併用的實驗情境中，視障者的行動速率及碰撞迴避均較佳。透過本研究偵測器的輔助，可協助視障者偵測近身障礙物，尤其是身體腰部以上的障礙物，可補足手杖使用偵測不足之處。對於自行研發的超音波電子偵測器，受測者均表示在行動輔助及行動信心上具有增進效果，80%受測者（12位）非常願意試用此一可偵測近身障礙物輔具，以協助改善行動的不便性。

關鍵字

視覺障礙者 ； 行動輔具 ； 障礙物偵測 ； 人因工程

並列摘要

This study assessed the use of travel-aid devices for the visually impaired persons under various scenes. Three experimental sceneries were designed and tested: the use of single white cane, an electrical obstacle detector and the combination of the two devices. Fifteen visually impaired subjects (4 teachers, 5 junior and 6 senior high school students from National Taichung School for the Visually Impaired) were invited to participate in this study. A designed questionnaire was applied to collect information about the usability of the tested devices at the end of the experimental tasks. The results showed that the walking speed was significantly different among three different experimental settings. With the combination of single white cane and the obstacle detector, the subjects' walking speed could be improved and the number of hitting against the obstacles was minimized. The results indicate the combination of single white cane and a detector was the most efficient device for the visually impaired person to travel. All subjects showed increasing confidence in using the obstacle detector, and 80% of the subjects preferred to use this device when it is available. The accomplished device in the study was expected to improve mobility of the visually impaired persons and to reduce their travel inconvenience.

並列關鍵字

Visually impaired people ； Travel-aid device ； Obstacle detection ； Ergonomics