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Repetitive Behaviours Questionnaire-2 (RBQ-2A)

What is the Repetitive Behaviours Questionnaire-2 (RBQ-2A)?

The Adult Repetitive Behaviours Questionnaire-2 (RBQ-2A) is a self-report questionnaire designed to assess repetitive and restrictive behaviours which are common features in autism spectrum conditions (ASC). The RBQ-2A consists of 20 questions which cover insistence of sameness and repetitive motor behaviours.

How are RBQ-2A scores interpreted?

  • Scores of 26 and above suggest a presence of autism.
  • Scores below 26  suggest a lack of evidence of autism
  • While the RBQ-2A tests for a core symptom of autism, it does not completely test for all other symptoms of autism and it is therefore important to note that an accurate diagnosis of autism can only be made by a qualified specialist
  • Repetitive behaviours noted in the test may also be associated with other medical conditions such as Parkinson’s disease, Tourette’s Disorder and Obsessive Compulsive Disorder.


The Adult Repetitive Behaviours Questionnaire-2 (RBQ-2A): A self-report measure of restricted and repetitive behaviours. Journal of autism and developmental disorders (Barrett et al., 2015)