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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 RAADS was designed to address a major gap in screening services for adults with autism spectrum disorders. With the increased prevalence of the condition and the fact that adults are being referred or self-referred for services or diagnosis with increasing frequency, this instrument is a useful clinical tool to assist clinicians with the diagnosis of this growing population of higher functioning individuals in adulthood.
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The scale contains two types of questions:
1. 64 questions describing specific symptoms of ASD. These are scored in order of severity from: “true now and when I was young” = 3, to “never true” = 0.
2. 16 questions describing non symptomatic (normative) behaviors. These are score: “true now and when I was young” = 0 to “never true” = 3.
A RAADS-R score of 65 or greater is consistent with a clinical diagnosis of ASD. A RAADS-R score of 64 or lower is not consistent with a diagnosis of ASD (sensitivity = 97%, specificity = 100%). It must be emphasized, however, that if a subject has a score of 64 or lower but clinical judgment indicates that ASD is present, the clinical judgment should take precedence.
Statistical analysis of the subscales
| Group | Subscale | Mean | SD |
|---|---|---|---|
Autistic spectrum | Social | 67.89 | 21.45 |
Autistic spectrum | Sensory motor | 32.82 | 12.25 |
Autistic spectrum | Circumscribed interests | 28.11 | 8.54 |
Autistic spectrum | Language | 11.08 | 4.54 |
Asperger | Social | 65.07 | 17.80 |
Asperger | Sensory motor | 28.96 | 13.07 |
Asperger | Circumscribed interests | 27.44 | 8.76 |
Asperger | Language | 10.06 | 4.37 |
No DSM IV | Social | 9.24 | 7.70 |
No DSM IV | Sensory motor | 5.26 | 5.33 |
No DSM IV | Circumscribed interests | 5.03 | 4.44 |
No DSM IV | Language | 1.86 | 2.46 |
Other DSM IV | Social | 13.88 | 9.95 |
Other DSM IV | Sensory motor | 7.72 | 4.92 |
Other DSM IV | Circumscribed interests | 7.08 | 4.69 |
Other DSM IV | Language | 1.43 | 1.76 |
PsyPack can automatically score the RAADS-R assessment and prepare corresponding tables and graphs.
Further, PsyPack automatically plots a graph to help you easily track progress over time.
Asperger Syndrome, Autism Spectrum Disorders
The purpose of the evaluation is to:
Clinician-administered
Clinical
Questionnaire
Adults (18 +) with average or above average intelligence
30-60 minutes
Since the questionnaire relies on client self-report, all responses should be verified by the clinician, and a definitive diagnosis is made on clinical grounds taking into account how well the client understood the questionnaire, as well as other relevant information from the client.
The RAADS-R was designed to assist clinicians in diagnosing adults (18+) with suspected ASD. It is designed to be administered by clinicians in a clinical setting. It is not intended to be a mail in or an online screening instrument. The questions are designed for individuals with average IQ and above. This is a population with mild or subclinical ASD. These individuals often escape diagnosis. The RAADS-R was specifically designed to capture that population.
Ritvo, R.A., Ritvo, E.R., Guthrie, D. et al. 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. J Autism Dev Disord 41, 1076–1089 (2011). https://doi.org/10.1007/s10803-010-1133-5