An ambiguous keyboard based on "character graphical association" for the severely physically handicapped

Authors:
Julio Miró-Borrás;Pablo Bernabeu-Soler;Raul Llinares;Jorge Igual
Affiliations:
Departamento de Comunicaciones, Universidad Politécnica de Valencia, Alcoy, Spain;Departamento de Comunicaciones, Universidad Politécnica de Valencia, Alcoy, Spain;Departamento de Comunicaciones, Universidad Politécnica de Valencia, Alcoy, Spain;Departamento de Comunicaciones, Universidad Politécnica de Valencia, Alcoy, Spain
Venue:
ICCHP'10 Proceedings of the 12th international conference on Computers helping people with special needs
Year:
2010

Citing 7
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Abstract

Ambiguous keyboards can be used instead of scan matrices in Scanning Systems in order to increase the text entry rate. We present a novel alternative to assigning letters to keys by taking into consideration the shapes of lowercase letters in order to create simple layouts, leading to families of keyboards with 2, 3 and 4 keys. We have chosen the best 3-key layout using a single switch scanning system and a word level disambiguation algorithm with a 10,911 word dictionary and we have tested it. We predict 16.6 wpm for an expert user with a 0.5 second scan period.