Journal of Rehabilitation Research & Development (JRRD)

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Volume 51 Number 6, 2014
   Pages 995 — 1012

Abstract — Method for enhancing text entry rate with single-switch scanning

Heidi Horstmann Koester, PhD;1* Richard Callaghan Simpson, PhD, ATP2

1Koester Performance Research, Ann Arbor, MI; 2Department of Electrical and Computer Engineering, New York Institute of Technology, Old Westbury, NY

Abstract — Single-switch scanning is a technique used by some individuals for spoken and/or written communication. We developed a method for adjusting the settings in a single-switch scanning interface to increase a user’s text entry rate (TER). We evaluated that method with nine individuals who use single-switch scanning to communicate. Text entry rates improved by an average of 120% (p = 0.003). All nine subjects increased their TER by at least 40%, and five of the nine increased their TER by over 100%. At baseline, TER averaged 1.42 words per minute (wpm), ranging from 0.28 to 2.92 wpm. With the revised settings, TER averaged 2.72 wpm and ranged from 1.12 to 6.51 wpm.

Key words: alternative communication, assistive device, assistive technology, augmentative communication, computer access, physical impairment, single-switch scanning, switch access, text entry, user performance.


View HTML ¦ View PDF ¦ Contents Vol. 51, No.6

This article and any supplementary material should be cited as follows:
Koester HH, Simpson RC. Method for enhancing text entry rate with single-switch scanning. J Rehabil Res Dev. 2014;51(6):995–1012.
http://dx.doi.org/10.1682/JRRD.2013.09.0201
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Last Reviewed or Updated  Wednesday, October 15, 2014 10:17 AM

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