The M-CHAT is also known as the Modified Checklist of Autism in Toddlers. It is a screening test used to identify children who may be at risk for autism, and is focused on toddlers (typically 16 to 30 months of age). It consists of a series of questions that the parent answers about their child and is often done at a well-child visit with a pediatrician. It does not officially diagnose a child with autism but indicates possible risk of autism and that a diagnostic assessment may be beneficial for the child. You can take it online on our website here.