FYI:
Dave
>From: "Tactile Display" <tactiledisplay@bellsouth.net>
>To: "gui talk" <gui-talk@nfbnet.org>
>Date: Wed, 15 Nov 2006 20:26:02 -0500
>Subject: [gui-talk] Need Your Advice
>
>Hello friends and colleagues
>
>
>
>Tactile Display Corporation (TDC) can manufacture a multi-line
>refreshable braille display (RBD) and must now answer 2 crucial
>questions: How big (rows high and cells wide) should the ideal RBD
>product be to function as a braille book reader? How big should our
>initial product be to be acceptable in the marketplace?
>
>
>
>As you are aware, there are 2 different standards for the
>presentation of brailled text: 25 lines by 40 characters for
>embossed hard copy (except for magazines) and 1 row by 20, 40 or 80
>cells wide for refreshable braille devices.
>
>
>
>Both standards, of course, are somewhat arbitrary - based on
>history, production limitations, current costs - and not on
>intrinsic psycho-physical and cognitive factors - reading rates,
>fatigue factors, and so on. Apparently, no research has been
>conducted on this question directly related to RBD products in
>connection with textbook access - tables, charts, and the like.
>
>
>
>I am aware only of research conducted at the University of Minnesota
>on line length as a crucial factor that determines reading rates - 5
>words or less drastically reduces reading rates in print as well as
>in braille. Too much context is lost.
>
>
>
>Also, it's well known that users are unable to read tables, charts,
>and spreadsheets with single-line braille displays; again, too much
>context is lost.
>
>
>
>Please think about and help us answer the question: What size
>multi-line refreshable braille display would you like, recommend, or
>agree to market?
>
>
>
>TDC can manufacture a multi-line RBD product at current single-line
>40-cell prices, so price should not be a deciding factor. Let me
>know if you would like to be a beta tester next year.
>
>
>
>Best regards, Peter Duran
>
>Tactile Display Corporation
>
>Fayetteville, GA
>
>Toll free: 877-993-4994
>
>tactiledisplay@bellsouth.net or brlinc@bellsouth.net
>
>
>
>
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