Behavioral questionnaires to help diagnose autism

Behavioral questionnaires are commonly used to help identify autistic behaviors and to evaluate their severity. The specific test used varies depending on the health professional's preference and the child's symptoms. Commonly used assessments include the following.

  • Modified Checklist for Autism in Toddlers (M-CHAT). This test is used to evaluate infants who are at least 24 months old. The M-CHAT is better than the original CHAT (Checklist for Autism in Toddlers) for detecting autism. The test continues to be studied to identify milder autistic symptoms.
  • Pervasive Developmental Disorder Screening. This questionnaire is completed by parents to evaluate early signs of autism.
  • Autism Screening Questionnaire. This test is for children 4 years of age and older.
  • Autism Behavior Checklist. This is a screening tool completed by the child's teacher.
  • Childhood Autism Rating Scale. This test rates how much a child's behavior varies from that of other children the same age (older than 24 months).
  • Autism Diagnostic Interview. Parents provide information about their child's behaviors during this wide-ranging, structured interview.
  • Autism Observation Schedule. During this test, a health professional observes a child as he or she performs several activities involving communication, social interaction, play, interests, and other behaviors.

Last Updated: May 19, 2008

Author: Jeannette Curtis

Medical Review: Michael J. Sexton, MD - Pediatrics & Fred Volkmar, MD - Child Psychiatry

related physicians

related services

Bon Secours International| Sisters of Bon Secours USA| Bon Secours Health System

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2010 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.