title: Validity of the autism diagnostic interview-revised.
abstract: The factor structure, internal consistency, and convergent validity of the Autism Diagnostic Interview-Revised (ADI-R) algorithm items were examined in a sample of 226 youngsters with pervasive developmental disabilities. Exploratory factor analyses indicated a three-factor solution closely resembling the original algorithm and explaining 38% of the variance, with one significant discrepancy: Unlike the algorithm, all nonverbal communication items were associated with the Social factor. Internal consistencies of domain scores ranged from .54 to .84. Correlations between ADI-R domain and total scores and instruments assessing adaptive behavior, psychopathology, and autism were examined. They indicated some similarities between constructs, but also that the ADI-R measures autism in a unique fashion.
authors.affiliation: Nisonger Center, The Ohio State University, Columbus, USA. lecavalier.1@osu.edu
authors.forename: Luc
authors.initials: L
authors.lastname: Lecavalier
authors.forename: Michael G
authors.initials: MG
authors.lastname: Aman
authors.forename: Lawrence
authors.initials: L
authors.lastname: Scahill
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: McDougle
authors.forename: James T
authors.initials: JT
authors.lastname: McCracken
authors.forename: Benedetto
authors.initials: B
authors.lastname: Vitiello
authors.forename: Elaine
authors.initials: E
authors.lastname: Tierney
authors.forename: L Eugene
authors.initials: LE
authors.lastname: Arnold
authors.forename: Jaswinder K
authors.initials: JK
authors.lastname: Ghuman
authors.forename: Rachel L
authors.initials: RL
authors.lastname: Loftin
authors.forename: Pegeen
authors.initials: P
authors.lastname: Cronin
authors.forename: Kathleen
authors.initials: K
authors.lastname: Koenig
authors.forename: David J
authors.initials: DJ
authors.lastname: Posey
authors.forename: Andres
authors.initials: A
authors.lastname: Martin
authors.forename: Jill
authors.initials: J
authors.lastname: Hollway
authors.forename: Lisa S
authors.initials: LS
authors.lastname: Lee
authors.forename: Alice S M
authors.initials: AS
authors.lastname: Kau
mesh_terms: D000293:Adolescent; D001321:Autistic Disorder / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D003710:Demography; D005260:Female; D006801:Humans; D007406:Interview, Psychological; D008297:Male; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires