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The Childhood Autism Spectrum Test, abbreviated as CAST and formerly titled the Childhood Asperger Syndrome Test, is a tool to screen for autism spectrum disorder in children aged 4–11 years, in a non-clinical setting.[1] It is also called the Social and Communication Development Questionnaire.[2]

Childhood-autism spectrum test
Medical diagnostics
  • Childhood Asperger Syndrome Test
  • Social and Communication Development Questionnaire



The questionnaire was developed by the Autism Research Centre at the University of Cambridge, by Fiona J Scott, Simon Baron-Cohen, Patrick Bolton, and Carol Brayne.[1]

Pilot StudyEdit

The pilot study was used to discern the preliminary cutoff scores for the CAST. Parents of 13 children with Asperger Syndrome and 37 typically developing children completed the CAST questionnaire. There were significant differences in average scores, with the Asperger Syndrome sample average of 21.08 (range 15 - 31) and the typical sample average of 4.73 (range 0–13).

Main StudyEdit

Parents of 1150 primary school aged children were sent the CAST questionnaire, with 199 responders and 174 taking part in the full data analysis. The results suggested that, compared to other screening tools currently available, the CAST may be useful for identifying children at risk for autism spectrum disorders, in a mainstream non-clinical sample.

Additional ResearchEdit

Research is ongoing to establish accurate sensitivity data,[3] validity, reliability,[4] to replicate current findings in a larger and geographically more diverse sample, and to study the epidemiological issues in greater detail.[1] The PhenX Toolkit uses CAST as its child protocol for symptoms of autism spectrum disorders.[2]


The CAST questionnaire contains 39 yes-or-no questions about the child's social behaviors and communication tendencies. It also contains a separate special needs section that asks about other comorbid disorders that the child might have.

See alsoEdit


  1. ^ a b c Scott FJ, Baron-Cohen S, Bolton P, Brayne C (December 2002). "The CAST (Childhood Asperger Syndrome Test): preliminary development of a UK screen for mainstream primary-school-age children" (PDF). Autism. 6 (4): 9–31. doi:10.1177/1362361302006001003. PMID 11918111.
  2. ^ a b "Protocol Overview: Symptoms of Autism Spectrum Disorders - Child". PhenX Toolkit, Ver 19.0. 17 January 2017.
  3. ^ Williams J, Scott F, Stott C, Allison C, Bolton P, Baron-Cohen S, Brayne C (February 2005). "The CAST (Childhood Asperger Syndrome Test): test accuracy". Autism. 9 (1): 45–68. doi:10.1177/1362361305049029. PMID 15618262.
  4. ^ Williams J, Allison C, Scott F, Stott C, Bolton P, Baron-Cohen S, Brayne C (July 2006). "The Childhood Asperger Syndrome Test (CAST): test-retest reliability". Autism. 10 (4): 415–27. doi:10.1177/1362361306066612. PMID 16908483.

External linksEdit