Participant characteristics predicting communication outcomes in AAC implementation for individuals with ASD and IDD: Meta-analysis

Authors

Jay B. Ganz

James E. Pustejovsky

Joe Reichle

Kimberly J. Vannest

Margaret Foster

Lauren M. Pierson

Sanikan Wattanawongwan

Amando Bernal

Man Chen

April N. Haas

Mary Rose Sallese

Rachel Skov

S. D. Smith

Published

April 20, 2022

This meta-analysis examined social communication outcomes in augmentative and alternative communication (AAC) interventions, or those that involved aided (e.g., speech generating devices, picture point systems) or unaided AAC (e.g., gestures, manual sign language) as a component of intervention, and the extent to which communication outcomes were predicted by participant characteristics. Variables of interest included chronological age, communication mode used prior to intervention, number of words produced and imitation skills of participants prior to intervention. Investigators identified 117 primary studies that implemented AAC interventions with school-aged individuals (up to 22 years) with autism spectrum disorder and/or intellectual disability associated with complex communication needs and assessed social-communication outcomes. All included studies involved single-case experimental designs and met basic study design quality standards. We synthesized findings across studies using two complementary effect size indices, Tau(AB) and the log response ratio, and multi-level meta-analysis with robust variance estimation. With Tau(AB), the overall average effect across 338 participants was 0.72, 95% CI [0.67, 0.76], with a high degree of heterogeneity across studies. With the log response ratio, the overall average effect corresponded to a 538% increase from baseline levels of responding, 95% CI [388%, 733%], with a high degree of heterogeneity across studies and contrasts. Moderator analyses detected few differences in effectiveness when comparing across diagnoses, ages, the number and type of communication modes the participants used prior to intervention, the number of words used by the participants prior to intervention, and imitation use prior to intervention.

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Citation

BibTeX citation:
@article{ganz2022,
  author = {Ganz, Jay B. and Pustejovsky, James E. and Reichle, Joe and
    Vannest, Kimberly J. and Foster, Margaret and Pierson, Lauren M. and
    Wattanawongwan, Sanikan and Bernal, Amando and Chen, Man and Haas,
    April N. and Sallese, Mary Rose and Skov, Rachel and Smith, S. D.},
  title = {Participant Characteristics Predicting Communication Outcomes
    in {AAC} Implementation for Individuals with {ASD} and {IDD:}
    {Meta-analysis}},
  journal = {Augmentative and Alternative Communication},
  volume = {39},
  number = {1},
  pages = {7-22},
  date = {2022-04-20},
  url = {https://doi.org/10.1080/07434618.2022.2116355},
  doi = {10.1016/j.jsp.2018.02.003},
  langid = {en}
}
For attribution, please cite this work as:
Ganz, J. B., Pustejovsky, J. E., Reichle, J., Vannest, K. J., Foster, M., Pierson, L. M., Wattanawongwan, S., Bernal, A., Chen, M., Haas, A. N., Sallese, M. R., Skov, R., & Smith, S. D. (2022). Participant characteristics predicting communication outcomes in AAC implementation for individuals with ASD and IDD: Meta-analysis. Augmentative and Alternative Communication, 39(1), 7–22. https://doi.org/10.1016/j.jsp.2018.02.003