M-CHAT™ - Autism Screening, The Modified Checklist for Autism in Toddlers, Revised with Follow-Up (M-CHAT-R/F; Robins, Fein, &Barton, 2009) is a 2-stage parent-report screening tool to assess risk for Autism Spectrum Disorder(ASD). The M-CHAT-R/F is available for free download for clinical, research, and educational purposes.Download of the M-CHAT-R/F and related material is authorized from www.mchatscreen.com.