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S. L. Levine

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Publications by S. L. Levine (bibliography)

1989

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Kreifeldt, J. G., Levine, S. L. and Iyengar, C. (1989): Reduced Keyboard Designs Using Disambiguation. In: Proceedings of the Human Factors Society 33rd Annual Meeting 1989. pp. 441-444.

“There are a number of important applications where the accuracy of typed copy is less important than other criteria, such as the speed of entry, ease of learning, reduced keyboard size, provision of innovative keyboard designs and work methods, etc. Some of these applications include communication devices for the motor handicapped and rough drafting. The applications in question still provide single finger typing as opposed to multifinger entries for chord keyboards. One approach to keyboard design for such applications involves using a multicharacter set. Because there is more than one character on a key, the number of keys can be reduced to a point limited only by the required accuracy of the text produced which is itself limited by the ability of "disambiguation" algorithms to decode the ambiguous text strings. Reducing the number of keys increases test entry rates and reduces learning time. Experiments with keysets of 10, 12, 14, and 16 keys have produced keystroke rates of 3.3 to 1.7 characters per second and a 6% keying error while the”

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