Searchable Title

Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R): A Scale to Assist the Diagnosis of Autism Spectrum Disorder in Adults: An International Validation Study. Copyright: Ritvo, R. A.; Ritvo, E. R.; Guthrie, D.; Ritvo, M. J.; Hufnagel, D. H.; McMahon, W.; Tonge, B.; Mataix-Cols, D.; Jassi, A.; Attwood, T.; Eloff, J.

Reference Type

Journal Article

Authors, Section

Ritvo, R. A.; Ritvo, E. R.; Guthrie, D.; Ritvo, M. J.; Hufnagel, D. H.; McMahon, W.; Tonge, B.; Mataix-Cols, D.; Jassi, A.; Attwood, T.; Eloff, J.

Title, Section

Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R): A Scale to Assist the Diagnosis of Autism Spectrum Disorder in Adults: An International Validation Study. Copyright: Ritvo, R. A.; Ritvo, E. R.; Guthrie, D.; Ritvo, M. J.; Hufnagel, D. H.; McMahon, W.; Tonge, B.; Mataix-Cols, D.; Jassi, A.; Attwood, T.; Eloff, J.

Publication Year

2011

Journal Title

Journal of Autism and Developmental Disorders

Volume

41

Issue

8

Pages

1076-89

Availability

online

PMID

PMID: 21086033

DOI

10.1007/s10803-010-1133-5

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.

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