“…For example, parent interview findings from the Special Education Elementary Longitudinal Study indicated that 17% of children with ID and 32% of children with autism had never visited with friends during the previous year, and 50% of children with ID and 81% of children with autism never or rarely received telephone calls from friends (Wagner et al, 2002). This social isolation may be particularly apparent in the lives of the subset of students with severe disabilities who experience complex communication challenges requiring the use of augmentative and alternative communication (AAC) systems (Beck, 2009;Hunt, Soto, Maier, Muller, & Goetz, 2002;Koppenhaver & Yoder, 1993). AAC refers to systems designed to supplement or substitute a person's speech through the use of a combination of aided (using external resources: e.g., objects, pictures, photographs) or unaided (e.g., signs, gestures, and eye gaze) modes as well as electronic (e.g., voice output communication aides [VOCAs]) or nonelectronic (e.g., communication books) devices (Beukelman & Mirenda, 2005).…”