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A Survey of Visual Display Terminal Work by the Visually Impaired and Development of a New Type of Assistive Device

视障者视觉显示终端工作调查及新型辅助器具的研制

基本信息

批准号：
07680473
负责人：
OHKURA Motohiro
金额：
$ 1.34万
依托单位：
Seikei University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07680473/
关键词：
visually impaired persons low vision VDT work aid double windows display power-assisted X-Y table

项目摘要

The research was composed of a field survey of visual display terminal work by visually Impaired persons and a development of a new type of assistive device for them.The survey by investigating eight low-vision VDT users visiting their workplaces showed that the frequent movement of the gaze position between a closed-circuit television (CCTV) and a personal computer display, plus the associated body movements (of mainly the neck and trunk) to manipulate a text table underneath the CCTV,made the work stressful and resulted in reduced work efficiency.To solve those problems, a novel system for text typing by low-vision persons has been developed and evaluated. The system is characterized by two main features : a visual display unit in shich two screens are displayd (a double windows display performed by 'WINDOWS' operating system) and a power-assisted text table operated by foot switches. In this system, two items are displayd simultaneously on one visual display unit : a field of the text placed on the table and captured by the CCTV,and the screen of a word processing program. The power-assisted text table was made using an X-Y recorder. The text table allows the operator to move it to any of four desired directions (in two dimensions) by using four foot switch buttons. Doubled clicks of one of the switches return the table to the reference point quickly.To evaluate the new system, it was compared with an ordinary two-displays system in the case of two low-vision participants. Their comments were favorable to the new system, especially concerning the decrease in long travel eye movements in shifting the gaze positions and concerning the ease of operating the power-assisted X-Y table. Importantly, the performance of typing tasks using the new system substantially improved.Finally, newly power-assisted X-Y table was developed for practical use.

通过对8名低视力VDT使用者的现场调查和新型辅助设备的研制，研究结果表明，使用VDT的视障者在工作时，其注视位置在闭路电视（CCTV）和个人电脑显示器之间频繁移动，加上相关的身体运动（主要是颈部和躯干）来操纵CCTV下面的文本表，使工作紧张，导致工作效率降低。为了解决这些问题，开发了一种用于低视力人文本打字的新系统，并进行了评估。该系统具有两个主要特点：一个是双屏显示的可视显示单元（由WINDOWS操作系统执行的双窗口显示），一个是由脚踏开关操作的电动辅助文本表。在该系统中，两个项目同时显示在一个视觉显示单元上：放置在桌子上并由CCTV捕获的文本字段，以及字处理程序的屏幕。使用X-Y记录仪制作动力辅助文本表。文本表允许操作员使用四个脚踏开关按钮将其移动到四个所需方向（二维）中的任何一个。双击其中一个开关，桌子就会快速返回参考点。为了评估新系统，在两个低视力参与者的情况下，将其与普通的双显示器系统进行了比较。他们的评论对新系统有利，特别是关于在转移注视位置时长距离眼球运动的减少以及关于操作电动辅助X-Y工作台的容易性。更重要的是，使用新系统的打字任务的性能大大提高。最后，新的动力辅助X-Y工作台被开发用于实际用途。