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Journal of Autism and Developmental Disorders

, Volume 38, Issue 2, pp 213–223 | Cite as

A Scale to Assist the Diagnosis of Autism and Asperger’s Disorder in Adults (RAADS): A Pilot Study

  • Riva Ariella Ritvo
  • Edward R. Ritvo
  • Donald Guthrie
  • Arthur Yuwiler
  • Max Joseph Ritvo
  • Leo Weisbender
Original Paper

Abstract

An empirically based 78 question self-rating scale based on DSM-IV-TR and ICD-10 criteria was developed to assist clinicians’ diagnosis of adults with autism and Asperger’s Disorder-the Ritvo Autism and Asperger’s Diagnostic Scale (RAADS). It was standardized on 17 autistic and 20 Asperger’s Disorder and 57 comparison subjects. Both autistic and Asperger’s groups scored significantly higher than comparison groups with no overlap; sensitivity, specificity, and content validity equaled one. Cronbach’s alpha coefficients of internal consistency of three subscales were satisfactory. Gender, age, and diagnostic categories were not significantly associated factors. The RAADS can be administered and scored in less than an hour and may be useful as a clinical scale to assist identification of autism and Asperger’s Disorder in adults. The RAADS does not distinguish between autism and Asperger’s Disorder.

Keywords

Diagnosis Autism Asperger’s Disorder RAADS 

Notes

Acknowledgments

We wish to express our gratitude to David Allen, PhD; Anne Panofsky, PhD; Victoria Ritvo; Stephen Shore; Temple Grandin, PhD; Roger N. Meyer; Colleen Clegg and Alan Slifka for their invaluable contributions and support.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Riva Ariella Ritvo
    • 1
  • Edward R. Ritvo
    • 2
  • Donald Guthrie
    • 2
  • Arthur Yuwiler
    • 3
  • Max Joseph Ritvo
    • 4
  • Leo Weisbender
    • 5
  1. 1.Yale Child Study CenterYale University School of MedicineNew HavenUSA
  2. 2.Neuropsychiatric Institute, Los Angeles Medical SchoolUniversity of CaliforniaLos AngelesUSA
  3. 3.Los Angeles Medical SchoolUniversity of CaliforniaLos AngelesUSA
  4. 4.Harvard Westlake SchoolLos AngelesUSA
  5. 5.California Graduate InstituteLos AngelesUSA

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