Text Entry When Movement is Impaired
Shari Trewin, IBM T. J. Watson Research Center, Yorktown Heights, NY, USA
John Arnott, University of Dundee, Dundee, Scotland, UK
15.1 INTRODUCTION
In a study commissioned by Microsoft, Forrester Research (2003) found that one in four working-age adults has some dexterity difficulty or impairment. Physical impairments can make traditional text entry mechanisms difficult or impossible to use (Jacko & Vitense, 2001; Sears & Young, 2003). For example, Parkinson’s disease can cause bradykinesia (slowness of movement), making it difficult for an individual to lift his or her finger off a key quickly. Multiple sclerosis can cause numbness in the fingers, so that it is difficult for an individual ...
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