Studies on hand-held visual communication device for the deaf and speech-impaired I. Visual display window size.
Messages were presented which moved from right to left along an electronic alphabetic display which was varied in "window" size from 4 through 32 letter spaces. Deaf subjects signed the messages they perceived. Relatively few errors were made even at the highest rate of presentation, which corresponded to a typing rate of 60 words/min. It is concluded that many deaf persons can make effective use of a small visual display. A reduced cost is then possible for visual communication instruments for these people through reduced display size. Deaf subjects who can profit from a small display can be located by a sentence test administered by tape recorder which drives the display of the communication device by means of the standard code of the deaf teletype network.
D000328:Adult; D000368:Aged; D003143:Communication Devices for People with Disabilities; D003638:Deafness / Q000534:rehabilitation*; D006801:Humans; D008875:Middle Aged; D012656:Self-Help Devices; D013064:Speech Disorders / Q000534:rehabilitation*