title: The Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R): a scale to assist the diagnosis of Autism Spectrum Disorder in adults: an international validation study.
abstract: The Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R) is a valid and reliable instrument to assist the diagnosis of adults with Autism Spectrum Disorders (ASD). The 80-question scale was administered to 779 subjects (201 ASD and 578 comparisons). All ASD subjects met inclusion criteria: DSM-IV-TR, ADI/ADOS diagnoses and standardized IQ testing. Mean scores for each of the questions and total mean ASD vs. the comparison groups' scores were significantly different (p < .0001). Concurrent validity with Constantino Social Responsiveness Scale-Adult = 95.59%. Sensitivity = 97%, specificity = 100%, test-retest reliability r = .987. Cronbach alpha coefficients for the subscales and 4 derived factors were good. We conclude that the RAADS-R is a useful adjunct diagnostic tool for adults with ASD.
authors.affiliation: The Child Study Center, Yale University School of Medicine, New Haven, CT, USA. ariella.ritvo@yale.edu
authors.forename: Riva Ariella
authors.initials: RA
authors.lastname: Ritvo
authors.forename: Edward R
authors.initials: ER
authors.lastname: Ritvo
authors.forename: Donald
authors.initials: D
authors.lastname: Guthrie
authors.forename: Max J
authors.initials: MJ
authors.lastname: Ritvo
authors.forename: Demetra H
authors.initials: DH
authors.lastname: Hufnagel
authors.forename: William
authors.initials: W
authors.lastname: McMahon
authors.forename: Bruce
authors.initials: B
authors.lastname: Tonge
authors.forename: David
authors.initials: D
authors.lastname: Mataix-Cols
authors.forename: Amita
authors.initials: A
authors.lastname: Jassi
authors.forename: Tony
authors.initials: T
authors.lastname: Attwood
authors.forename: Johann
authors.initials: J
authors.lastname: Eloff
mesh_terms: D000328:Adult; D020817:Asperger Syndrome / Q000175:diagnosis*; D001321:Autistic Disorder / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D012680:Sensitivity and Specificity; D012919:Social Behavior; D011795:Surveys and Questionnaires