What is the M-CHAT?
Modified Checklist for Autism in Toddlers (M-CHAT) - The M-CHAT is an expanded American version of the original CHAT from the U.K (Baron-Cohen et al., 1992; 1996). The M-CHAT has 23 questions using the original nine from the CHAT as its basis. The goal of the ongoing M-CHAT research is to demonstrate adequate psychometric properties of the M-CHAT (sensitivity, specificity, positive and negative predictive power).
Vaccines & Autism
There has been much discussion on whether or not vaccines are related to autism. There is now evidence that shows that the two are unrelated.