M-CHAT-R Autism Screening for 29-Month-Olds
At 29 months, you are approaching the upper boundary of the M-CHAT-R's validated range. Completing the checklist now — and acting promptly on the result — is important to ensure the referral process begins while the child is still within the instrument's validated window.
- Questions
- 20
- Format
- Yes / No
- Time
- ~5 minutes
- Completed by
- Parent or caregiver
- Age range
- 16–30 months
About the M-CHAT-R
At 29 months, children who are developing typically use complex sentences, engage in imaginative play with peers, and demonstrate well-established social communication. They understand others' perspectives in simple situations and show a growing ability to regulate their emotions.
For children approaching 30 months where social communication concerns have persisted, completing the M-CHAT-R and initiating follow-up without delay gives the best chance of an efficient pathway to assessment.
Source: Modified Checklist for Autism in Toddlers, Revised — Robins, Fein & Barton (2009)
Frequently asked questions
- Is 29 months near the upper limit of the M-CHAT-R?
- Yes — the M-CHAT-R is validated for 16 to 30 months. At 29 months you are still within the validated range, but if a positive result warrants further evaluation, the referral process should begin promptly to ensure appropriate instruments are used for the formal assessment.
- What screening tool comes after M-CHAT-R?
- For children aged 2 to 4, the Q-CHAT is the next appropriate screening tool. For children aged 4 and above, the CAST is used. If you are approaching 30 months, speak with your paediatrician about the most suitable pathway based on your child's specific profile.
- What happens if my child screens at risk?
- A positive screen means enough reported behaviours are present to warrant further evaluation. The recommended next step is a referral to a developmental paediatrician, paediatric psychologist, or specialist autism diagnostic service. Early referral leads to earlier access to support.
- Does a positive screen mean my child has autism?
- No. A positive screen is not a diagnosis. Many children who screen positive do not receive an autism diagnosis after full evaluation. Only a qualified clinician carrying out a comprehensive assessment can diagnose autism spectrum disorder.
- How long does the screening take?
- Most parents complete the M-CHAT-R in 3 to 5 minutes. Results and guidance are available immediately after the last question.
Free · Private · Results in under 15 minutes