Performance of Disabled Persons on a Chordic Keyboard
研究了14名残疾人在单手和弦键盘上的打字表现，该键盘设计用于减少体力消耗和抑制不良心理运动反应，经过5小时练习后打字速度达到每分钟8到14个单词。
Fourteen disabled persons used a one-hand chordic device for typing. This keyboard was designed to minimize physical exertion and to inhibit unwanted psychomotor reactions so as to facilitate its use by persons with cerebral palsy, muscular dystrophy, and related disorders. The keyboard fits the fingers of one hand. A character is typed by pressing a combination of fingers corresponding to a typing code developed earlier. Typing rates of text transcription ranged from 8 to 14 words/min after 5 h of practice. These results indicated that the physical configuration and cognitive operation of a chordic keyboard would permit disabled persons to use computers.