Validity of the autism diagnostic interview-revised.
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.
Lecavalier
Luc
L
Nisonger Center, The Ohio State University, Columbus, USA. lecavalier.1@osu.edu
Aman
Michael G
MG
Scahill
Lawrence
L
McDougle
Christopher J
CJ
McCracken
James T
JT
Vitiello
Benedetto
B
Tierney
Elaine
E
Arnold
L Eugene
LE
Ghuman
Jaswinder K
JK
Loftin
Rachel L
RL
Cronin
Pegeen
P
Koenig
Kathleen
K
Posey
David J
DJ
Martin
Andres
A
Hollway
Jill
J
Lee
Lisa S
LS
Kau
Alice S M
AS
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