Abstract
Purpose: Using data from a randomized clinical trial evaluating cognitive behavioral therapy (CBT) for children with autism and co-occurring anxiety, this study examined the relationship between autism features and anxiety symptoms throughout CBT. Methods: Two multilevel mediation analyses were run which examined the mediating role of changes in anxiety for changes in two core features of autism, (a) repetitive and restrictive behaviors (RRBs) and (b) social communication/interaction impairments, between pre- and post-treatment. Results: Indirect effects between time and autism characteristics were significant for both models, indicating that as anxiety changes, so do RRBs and social communication/interaction as the outcomes respectively. Conclusion: Findings suggest a bidirectional relationship between anxiety and autism features. Implications of these findings are discussed.
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Notes
Constrained maximum-likelihood estimation was used because it yields unbiased and consistent estimators for variance coefficients and is less sensitive to outliers compared to maximum likelihood estimation. However, when the models were run using to maximum likelihood estimation (instead of constrained maximum-likelihood estimation), the results stayed identical.
While the authors were interested in a fine-grained examination of the precise subscales analyzed (Social Communication and Restricted Interests and Repetitive Behaviour) rather than the total SRS score (which includes additional Social Awareness, Social Cognition, and Social Motivation subscales), additional analyses indicated that the two subscales examined are highly correlated with the total SRS score (r > .7). The results reported above did not change when the models were run with the total SRS scores.
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Dr. Wood discloses the following relationships: Research support from NIH and the Department of Defense. Dr. Kendall receives royalties from the sales of materials related to the treatment of anxiety disorders in youth. Dr. Kerns receives royalties from Elsevier. In addition, she has received honoraria and consulting fees for training other researchers on the Autism Spectrum Addendum. Dr. Storch discloses the following relationships: consultant for Biohaven Pharmaceuticals and Brainsway; Book royalties from Elsevier, Springer, American Psychological Association, Wiley, Oxford, Kingsley, and Guilford; Stock valued at less than $5000 from NView; Research support from NIH, IOCDF, Ream Foundation, and Texas Higher Education Coordinating Board.
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Fuselier, M.N., Guzick, A.G., Bakhshaie, J. et al. Examining the Relationship Between Anxiety Severity and Autism-Related Challenges During Cognitive Behavioral Therapy for Children with Autism. J Autism Dev Disord (2023). https://doi.org/10.1007/s10803-023-05912-z
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DOI: https://doi.org/10.1007/s10803-023-05912-z