Reliability, validity and acceptability of the PEDI-CAT with ASD scales for Australian children and youth on the autism spectrum.

Published April 2024

Abstract

Purpose
The PEDI-CAT (ASD) is used to assess functioning of children and youth on the autism spectrum; however, current psychometric evidence is limited. This study aimed to explore the reliability, validity and acceptability of the PEDI-CAT (ASD) using a large Australian sample.

Methods
Caregivers of 134 children and youth on the spectrum participated in clinical assessments involving the administration of the PEDI-CAT (ASD), Vineland-3, PEDI-CAT (Original) and a feedback instrument. The PEDI-CAT (ASD) content was compared to the ICF Core Sets for ASD to summarize areas of functioning assessed and relevance to autism.

Results
The PEDI-CAT (ASD) demonstrated good to excellent internal consistency and test-re-test reliability. Parallel forms reliability with the PEDI-CAT (Original) included significant correlations (good to excellent), however, t-tests showed significantly higher Social/Cognitive scores for the ASD version. Convergent validity results demonstrated that most PEDI-CAT (ASD) and Vineland-3 core domains were significantly correlated (poor to good). Content analysis revealed that the PEDI-CAT (ASD) covered less than half of the ICF Core Sets for ASD (mostly Activities and Participation codes). Just over half the codes assigned to the PEDI-CAT (ASD) were represented in the ICF Core Sets for ASD. Feedback on the acceptability of the measure was mixed, but overall was it was considered user-friendly and efficient.

Conclusion
The PEDI-CAT (ASD) had adequate psychometric properties and acceptability as a measure of Activities and Participation codes. However, it lacks comprehensiveness and relevance when compared to the ICF Core Sets for ASD and has the potential to overestimate functioning.

Key Words
Adolescents; Adaptive behavior; Assessment of functioning; Measurement; Overall utility; Psychometric properties

Citation

Chamberlain, A., D'Arcy, E., Whitehouse, A. J. O., Wallace, K., Hayden-Evans, M., Girdler, S., Milbourn, B., Bölte, S., & Evans, K. (2023). Reliability, validity and acceptability of the PEDI-CAT with ASD scales for Australian children and youth on the autism spectrum. Journal of Autism and Developmental Disorders. https://doi.org/10.1007/s10803-024-06366-7

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