隨著科技的日益發展，電腦已在日常生活中扮演不可或缺的角色，但對於肢體障礙者，電腦的操作仍有一定的難度，需藉由電腦輔具來協助。目前國內已有許多螢幕鍵盤軟體可以協助肢體障礙者操作電腦，但肢體障礙者的障礙程度與動作能力個別差異甚大，對於螢幕鍵盤的需求亦不盡相同，且在操作複雜的動作與功能表上有極大困難。
　　本研究旨在發展一適性螢幕鍵盤系統，利用螢幕鍵盤評估程式，評估出使用者適用的螢幕鍵盤設定，包括：輸入模式、鍵盤大小、按鍵大小及在暫留模式下所合適的最短暫留時間。此外，將這些螢幕鍵盤設定輸出為XML格式的使用者評估報告，並產生依使用者適性調整之螢幕鍵盤，以滿足不同使用者需求。
　　我們發展的系統，可依照不同使用者的評估結果進行調整，提供客製化的適性螢幕鍵盤。本系統相較於現有的螢幕鍵盤軟體，提供了快速鍵的功能，可加快並簡化電腦的操作，且提供功能表操作的功能，可以快速便捷地操控開始功能表、下拉式功能表與浮動式功能表，減輕使用者的負擔。除此之外，本系統還可以彈性的依使用者需求調整螢幕鍵盤的版面與設定，以達到個人化的呈現。透過本系統的協助，肢體障礙者能夠更便利、更輕鬆地操作電腦與完成資料輸入。

With the development of computer technology, computer is becoming an essential part in our life. But, to operate on computer might be a very difficult task for persons with physical disabilities. At present, there are many on-screen keyboard software been developed to assist persons with physical disabilities. However, these software can not fulfill the complex demands of the on-screen keyboard for people with physical disabilities.
The purpose of this study is to develop an adaptive on-screen keyboard system which can include a on-screen keyboard evaluation process. Using the on-screen keyboard evaluation process, users will get his personal proper settings of the on-screen keyboard, including: the input mode of the on-screen keyboard, the size of the on-screen keyboard, the size of keys on the on-screen keyboard, and the minimum delay time in hovering mode. In addition, we also design a XML format of the user evaluation report, and create a user-adaptive adjustment on-screen keyboard to satisfy the needs of different users.
Our system provides not only shortcuts function but also menu operating function which is better than most of the current on-screen keyboard software. User can quickly and easily control the start menu, pull-down menu and popup menu to reduce the burden of the people with physical disabilities. In other words, it can simplify or speed up the computer operation. In addition, it can also flexibly adjust the settings and layout of the on-screen keyboard according to user's different demand. This research can help people with physical disabilities to use computer and input data in more convenient and easier way.

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