“…To enable a person with multiple disabilities to use microswitch technology to control environmental stimulation, one needs to identify a plausible response and a microswitch suitable to that response (Crawford & Schuster, 1993;Saunders et al, 2001). Various responses have been suggested in the literature as highly plausible and convenient, for example, head-turning, hand movements, and vocalization (Kinsley & Langone, 1995;Sullivan, Laverick, & Lewis, 1995).…”