Spontaneity of augmentative and alternative communication in persons with intellectual disabilities: critical review

This paper examines the issue of communicative spontaneity in natural environments of persons with intellectual disabilities who rely on augmentative or alternative communication (AAC) systems. A number of data-based studies are examined and their findings discussed. Unfortunately, interpretation of existing research is complicated by a number of factors including outdated conceptualizations and definitions of spontaneity. It is argued that future research needs to adopt a more sophisticated model of spontaneity and systematically investigate a broad range of environmental variables that may occasion communication in persons with severe disabilities. Such fundamental research may well provide a foundation for the development of more effective strategies to enhance spontaneity.