New possibilities for enhanced keyboard input for the handicapped
作者:
SoedeMathijs,
van BalkomHans L. M.,
DeroostGreta,
FonH. M.,
KnippenbergVan,
KamphuisHarry,
期刊:
Journal of Medical Engineering&Technology
(Taylor Available online 1989)
卷期:
Volume 13,
issue 1-2
页码: 34-36
ISSN:0309-1902
年代: 1989
DOI:10.3109/03091908909030191
出版商: Taylor&Francis
数据来源: Taylor
摘要:
Motor-and speech-impaired people can have severe problems with communication. If speech is hampered, the use of computerized communication devices can be a solution. Key entry limitations due to motor impairments may result in very low communication speeds - less than three words a minute is not unusual.The research described here deals with speed enhancement on the basis of redundancy in language. Two uses are explored: prediction and automatic decoding in the case of keyboards with a small number of keys.Prediction means that characters, words and (parts of) sentences are predicted on the basis of text which is already typed in. A prototype system is being designed which combines the features of the PAL prediction system from Dundee and the WRITE-keyboard from Boston.Decoding refers to two-step selection systems with a small number of keys in which the second selection is done automatically by a computer program. Keystroke savings of 40 to 50% are possible.
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