Does the Factor Structure of IQ Differ Between the Differential Ability Scales (DAS-II) Normative Sample and Autistic Children?

Publication date: Feb 29, 2020

The Differential Abilities Scales, 2nd edition (DAS-II) is frequently used to assess intelligence in autism spectrum disorder (ASD). However, it remains unknown whether the DAS-II measurement model (e.g., factor structure, loadings), which was developed on a normative sample, holds for the autistic population or requires alternative score interpretations. We obtained DAS-II data from 1,316 autistic individuals in the Simons Simplex Consortium and 2,400 individuals in the normative data set. We combined ASD and normative data sets for multigroup confirmatory factor analyses to assess different levels of measurement invariance, or how well the same measurement model fit both data sets: “weak” or metric, “strong” or scalar, and partial scalar if full scalar was not achieved. A weak invariance model showed excellent fit (Confirmatory Fit Index [CFI]?>?0.995, Tucker Lewis Index [TLI]?>?0.995, root mean square error of approximation [RMSEA]?

Clements, C.C., Watkins, M.W., Schultz, R.T., and Yerys, B.E. Does the Factor Structure of IQ Differ Between the Differential Ability Scales (DAS-II) Normative Sample and Autistic Children? 15347. 2020 Autism Res.

Concepts Keywords
Autism Psychiatry
Autism Spectrum Disorder Abnormal psychology
Autistic Psychiatric diagnosis
Intelligence Organ systems
Metric Pervasive developmental disorders
Normative Neurological disorders
Scalar RTT
Simplex Autism

Semantics

Type Source Name
disease MESH autism spectrum disorder
disease MESH autistic disorder

Original Article

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