title: Exploratory and confirmatory factor analysis of the autism diagnostic interview-revised.
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.
authors.affiliation: Section of Behavioral Medicine, Children's Hospital for Rehabilitation, The Cleveland Clinic, Shaker Campus CR11, Cleveland, OH 44104, USA. fraziet2@ccf.org
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Frazier
authors.forename: Eric A
authors.initials: EA
authors.lastname: Youngstrom
authors.forename: Cynthia S
authors.initials: CS
authors.lastname: Kubu
authors.forename: Leslie
authors.initials: L
authors.lastname: Sinclair
authors.forename: Ali
authors.initials: A
authors.lastname: Rezai
mesh_terms: D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000175:diagnosis*; D002648:Child; D003937:Diagnosis, Differential; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007406:Interview, Psychological; D008297:Male