📖 Source: Robins DL, Casagrande K, Barton M, Chen CM, Dumont-Mathieu T, Fein D. Validation of the Modified Checklist for Autism in Toddlers, Revised with Follow-up (M-CHAT-R/F). Pediatrics. 2014;133(1):37-45. | Parent-report · 20 items (+ follow-up interview if positive) · ~5 min · 0–20 · 3+ positives, or 2+ critical items, warrant evaluation