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.
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.
- Content Type Journal Article
- DOI 10.1007/s10803-010-1133-5
- Authors
- Riva Ariella Ritvo, The Child Study Center, Yale University School of Medicine, New Haven, CT USA
- Edward R. Ritvo, The Geffen School of Medicine at UCLA, Los Angeles, CA USA
- Donald Guthrie, The Geffen School of Medicine at UCLA, Los Angeles, CA USA
- Max J. Ritvo, Yale College, New Haven, CT USA
- Demetra H. Hufnagel, Yale College, New Haven, CT USA
- William McMahon, University of Utah School of Medicine, Salt Lake, UT USA
- Bruce Tonge, Monash University, Melbourne, VIC Australia
- David Mataix-Cols, King’s College London, London, UK
- Amita Jassi, King’s College London, London, UK
- Tony Attwood, Griffith University, Brisbane, QLD Australia
- Johann Eloff, Griffith University, Brisbane, QLD Australia
- Journal Journal of Autism and Developmental Disorders
- Online ISSN 1573-3432
- Print ISSN 0162-3257