Physical characteristics of persons with physical disabilities regarding the use of augmentative and alternative communication devices

为了支持身体残疾人士的交流，选择最适合他们的设备并使其适应其残障功能的特点是很重要的。作者的研究结果如下：1。作者提出了一种新的针对不同类型残疾人的最适合输入设备的自动选择算法，并从最大信息传输速度的角度出发，综合考虑用户的活动范围、控制精度和推开关的操作压力，完成了一个试验系统。为了定量测量口棒的运动范围和控制精度，作者开发了一种使用大尺寸触摸面板的测量系统。他们提出了一种极坐标模型来描述口腔棒的可控性。为了调查按钮上表面操作压力的时间模式，作者开发了专用的测量硬件和软件，并收集了不同类型残疾人的时间模式数据。为了提高扫描式字符输入系统的输入速度，作者指出了考虑日语句子中相邻字符组合的频率而选择的字符表第一行附加字符的有效性。研究表明，推开关的定时信息和文本的语言信息对扫描式字符输入系统的自动纠错是有用的。采用NASA-TLX对扫描式自动纠错字符输入系统使用过程中的脑力负荷进行了定量测量。

In order to support communication of persons with physical disabilities, it is important to select the most suitable device to them and to adapt it to the characteristics of their residual functions.The authors have got research results shown below:1. The authors have proposed a new automatic selection algorithm for the most suitable input device to each person with different type of disabilities, and completed a trial system from the viewpoint of the maximal information transmission speed with consideration of user's range of motion, control accuracy and operating pressure to push switches.2. In order to measure range of motion and control accuracy for mouthsticks quantitatively, the authors have developed a measuring system using a large-sized touch panel. They have proposed polar coordinates model for the controllability of mouthsticks.3. For the investigation of the time pattern of the operating pressure at the top surface of the buttons the authors have developed special hardware and softw are for the measurement, and gathered data of time patterns of persons with different types of disabilities.4. For the improvement of the input speed of the scan-type character input system, the authors have indicated the effectiveness of the additional characters at the first row of the character table which are selected with consideration of the frequency of the combination of the neighboring characters in Japanese sentences.5. It has been indicated that the timing information of pushing switch is useful as well as linguistic information of the text for the automatic error correction of the scan-type character input system. The mental workload during the use of scan-type character input system with automatic error correction has been measured quantitatively by using NASA-TLX.