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Russell-Minda, E., Jutai, J.W., Strong, J.G., Campbell, K.A., Gold, D., Pretty, L. and Wilmot, L. (2007) The Legibility of Typefaces for Readers with Low Vision: A Research Review. Journal of Visual Impairment and Blindness, 101, 402-415.

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• TITLE: Evaluation and Design of Alphabetic Communication Boards

  AUTHORS: David John Williams

  KEYWORDS: Combinatorics, Compositions, Frequency Analysis, Medicine, Ergonomics

  JOURNAL NAME: Applied Mathematics, Vol.7 No.2, February 5, 2016

  ABSTRACT: Communication boards provide a low-cost means of facilitating communication with patients who are unable to speak; however the process is slow and frustrating. A computer model was used to calculate the cumulative frequency-weighted path length for letter selection (“chart index”) for three conventional communication boards using different search strategies; and exhaustively generate and evaluate designs for a novel communication board based on a frequency-ordered arrangement of letters. For all arrangements, a 46% to 53% reduction in chart indices was achieved when “2 Dimensional” (2D) rather than “1 Dimensional” (1D) search strategies were employed. A further 23% to 30% reduction in chart indices was achieved through use of frequency-ordered sequences with optimal row groupings. Conventional communication boards can be used more efficiently by employing a 2D search strategy. Novel communication boards based on optimised arrangements of frequency-ordered letter sequences potentially provide a faster means of communication than conventional communication boards.