Promising Strategies for Teaching Augmentative and Alternative Communication in Inclusive Educational Settings: A Systematic Review.

PURPOSE: The purpose of this article was to conduct a systematic review of the literature on teaching or increasing the use of augmentative and alternative communication (AAC) by students with significant intellectual disabilities and complex communication needs (CCNs) within inclusive school settings.

METHOD: A systematic review of research literature from 1998 to 2022 was completed using multiple electronic databases, as well as citation chaining and cited author reference searches. Three hundred two articles were located with 17 meeting criteria for inclusion in this systematic review. Articles were initially screened by one author for potential inclusion; the remaining 83 were coded by one author and reviewed for consensus by three authors for inclusion in this review. Articles were analyzed and rated regarding both level of research design and quality of methodology.

RESULTS

All studies reported positive outcomes, with students with significant intellectual disabilities and CCN, of AAC intervention implemented in an inclusive setting. Fourteen over 17 studies were single-case designs with an average rating of 76% on the Single-Case Experimental Design measure of methodological quality. Less than half of the studies assessed generalization of subject learning. Review of interventions used in the studies, however, revealed the majority of studies utilized packages of interventions, making it difficult to determine the effectiveness of individual approaches.

CONCLUSIONS

This systematic review indicates there are promising interventions within inclusive settings for improved use of AAC by students with significant intellectual disabilities and CCN. Further research is needed, however, to obtain more data on generalization of student gains as well as to determine which specific interventions might be the most successful for this population of students in inclusive settings.