ERIC Number: ED310596
Record Type: Non-Journal
Publication Date: 1987
Reference Count: N/A
Comparative Analysis of Fixed-Vocabulary Communication Techniques: Trace Reprint Series.
Vanderheiden, G. C.; Kelso, D. P.
Vocabulary systems for individuals using communication aids can be broken down into two major types: coverage vocabularies and acceleration vocabularies. Acceleration vocabularies or word sets assume the individual is able to spell and words are chosen which speed up the rate of communication. Acceleration techniques may include sets of most frequently used words or syllables, abbreviation-expansion techniques, word prediction techniques, linguistic expansion, and full sentence storage and retrieval. This paper presents data regarding the coverage power of most-frequently-used-word sets, the effects of word length and keystroke analyses on calculated word set efficiencies, and the effect of different termination and abbreviation strategies. Word set analyses which do not take keystroke analysis into account are shown to be overly optimistic due to the heavily skewed distribution of word length versus usage. A generic abbreviation algorithm is described which allows implementation and comparison of other strategies. Fixed-vocabulary, letter-based word prediction techniques are shown to be a form of cued abbreviation expansion with a relatively low motor efficiency. (Author/DB)
Descriptors: Communication Aids (for Disabled), Communication Disorders, Communication Skills, Time, Vocabulary, Word Lists
Trace Center, University of Wisconsin-Madison, Waisman Center, 1500 Highland Ave., Madison, WI 53705-2280.
Publication Type: Reports - Descriptive; Journal Articles
Education Level: N/A
Sponsor: National Inst. on Disability and Rehabilitation Research (ED/OSERS), Washington, DC.
Authoring Institution: Wisconsin Univ., Madison. Trace Center.