Abstract
This paper examines various issues related to the problems of acquisition and generalization experienced by people with severe disabilities who rely on augmentative and alternative communication (AAC) systems. Many of these individuals experience difficulties using newly acquired communication skills in settings, and with conversational partners, that differ from those introduced in the instructional context. Methods of promoting functional communication skills are addressed, with particular emphasis placed on the need to incorporate environmental variables into the instructional process. Implications for future clinical-educational and research endeavors are discussed