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What is the Ritvo Autism Asperger Diagnostic Scale-Revised?

The RAADS-R is a self-report questionnaire designed to assess traits associated with autism spectrum conditions (ASC) in adults. The RAADS-R consists of 80 questions related to social interaction, sensory sensitivities, communication and circumscribed interests. The test can be used to identify individuals who “escape” diagnosis in other clinical evaluations.

How are RAADS-R scores interpreted?

  • A score of 65 and above suggests a presence of autism
  • A score of 64 and below suggests an absence of autism
  • The RAADS-R’s sensitivity is highly positive at 97%
  • It is important to note that the RAADS-R is only a screening instrument to help with the assessment process and an accurate diagnosis of autism can only be made by a qualified specialist


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 (Ritvo et al., 2011)