The Modified Checklist for Autism in Toddlers (M-CHAT; Robins, Fein, & Barton, 1999) is available for free download for clinical, research, and educational purposes.

Authorized download is available at two websites. The MCHAT and supplemental materials can be downloaded from or from Dr. Robins’ website at

Authors' Note:  Users should be aware that the M-CHAT continues to be studied, and may be revised.