“…Individuals with severe and multiple disabilities, for example, have acquired specific request-making skills using SGDs (Schepis, Reid, & Behrmann, 1996;Soto, Belfiore, Schlosser, & Haynes, 1993); and individuals with autism have learned to use social comments (e.g., 'Thank you') and to respond to questions (e.g., 'Yes' and 'No') in the context of daily routines (Schepis, Reid, Behrmann, & Sutton, 1998). Increases in initiations of communicative interactions by individuals with disabilities using SGDs have also been noted (McGregor, Young, Gerak, Thomas, & Vogelsberg, 1992;Dattilo & Camarata, 1991). Conversational turn-taking between support personnel and people with severe disabilities has likewise been reported as an outcome of providing individuals with access to SGDs (Schepis & Reid, 1995;Schepis et al, 1998;O'Keefe & Dattilo, 1992).…”