Original Paper

Journal of Autism and Developmental Disorders

, Volume 38, Issue 3, pp 474-480

Exploratory and Confirmatory Factor Analysis of the Autism Diagnostic Interview-Revised

  • Thomas W. FrazierAffiliated withSection of Behavioral Medicine, Children’s Hospital for Rehabilitation, The Cleveland Clinic Email author 
  • , Eric A. YoungstromAffiliated withDepartment of Psychology, University of North Carolina at Chapel Hill
  • , Cynthia S. KubuAffiliated withSection of Neuropsychology, The Cleveland Clinic
  • , Leslie SinclairAffiliated withCenter for Autism, The Cleveland Clinic
  • , Ali RezaiAffiliated withCenter for Neurological Restoration, The Cleveland Clinic

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Abstract

The factor structure of the Autism Diagnostic Interview-Revised (ADI-R) algorithm items was examined using exploratory (EFA) and confirmatory factor analyses (CFA) factor methods. The ADI-R was completed for 1,170 youths and adults (ages 2–46). Results of EFAs indicated strong support for two-factor structure, with social communication and stereotyped behavior factors. CFAs computed in a holdout sub-sample indicated roughly equal support for the above described two-factor model and a three factor model separating peer relationships and play from other social and communicative behaviors. Multi-group CFAs suggested that both two and three factor models showed good stability across age, with only slight changes in factor relationships. These findings indicate that the current ADI-R structure be revised to more accurately reflect the relationships between sub-scales.

Keywords

Autism Autism diagnostic interview-revised Exploratory factor analysis Multi-group confirmatory factor analysis