The role of the body in SGD-mediated interactions.

Most research about augmentative and alternative communication (AAC) has focused on improving use of and access to speech generating devices (SGDs). However, many adults with significant physical and developmental disabilities express a preference for unaided, embodied forms of communication. This study used conversation analysis (CA) techniques to analyze the forms and functions of embodied communication that occurred during interactions between a young man who used unaided, embodied communication and an SGD to communicate with a familiar communication partner. Close analysis revealed that embodied resources were required for both unaided and aided forms of communication. Furthermore, both participants used their bodies to establish interactional spaces with different focal points during interaction, which placed different demands on the aided speaker. Unfortunately, when the SGD was the focal point, problematic demands were placed on the aided speaker, which in turn resulted in increased embodied effort on his part. The forms and functions of the body, differences in the participants' interactions when communication did and did not involve the SGD, and implications for research and practice are all reported and discussed.