無障礙閱讀資源整合查詢系統介面易用性評估

Assessment of the Accessibility of the Integrated Information System for People with Disabilities

本研究進行「無障礙閱讀資源整合查詢系統」設計易用性評估，採任務導向之實測觀察身心障礙者檢索歷程與操作問題，再輔以深度訪談及問卷方式，分析受測者對於系統學習性、助記性、容錯性、效率性，以及滿意度之意見及認同程度。研究結果發現：(1)使用個人化服務功能發生錯誤以及花費時間最多；(2)視覺障礙者「操作猶豫」及「提問」次數偏高，完成任務時間明顯高於其他類型障礙者；(3)導致錯誤原因多屬功能鍵位置設計不當；(4)檢索結果排序及圖書檢索功能的網頁迷失度較高；(5)系統操作說明位置不明顯且說明文字較為冗長。最終，根據研究結論，提出系統功能改善建議。

This study conducted task-based usability testing to evaluate ＂the Integrated Information System for People with Disabilities of National Taiwan Library.＂ Adopted observation analysis to record the user's retrieval process and problems, supplemented by in-depth interviews, to explore the user's opinions after testing. Questionnaires also were taken to measure the awareness for the learnability, memorability, error frequency and severity, efficiency and satisfaction of the system. The results are summarized as follows: (1) Personalized service functions generate the most operating errors and take the most time. (2) Visually-impaired persons have a high frequency of ＂operation hesitation＂ and ＂questioning,＂ and the time to complete tasks is higher than other types of impaired persons. (3) Most of the reasons for the error are improper design of the function key position. (4) The sorting of search results and the operation process of search have high lostness in web pages. (5) The position of the system operation instructions is not obvious and the textual description is lengthy. According to the result, the suggestions of usability design have been proposed for improving the system interface.