What screening tool is commonly used to assess autism risk at the 18-month visit?

The Modified Checklist for Autism in Toddlers (M-CHAT) is the correct answer because it is specifically designed to assess the risk of autism spectrum disorder (ASD) in children aged 16 to 30 months. The M-CHAT is a widely used screening tool that consists of a series of questions aimed at identifying developmental concerns in toddlers. It helps practitioners detect signs of autism early in the child's life, enabling timely intervention and support.

The M-CHAT is particularly effective at the 18-month visit, which is a critical period for monitoring developmental milestones related to social communication, as early identification can lead to improved outcomes for children at risk of ASD.

Other tools mentioned, such as the Ages and Stages Questionnaire (ASQ), while valuable for assessing a variety of developmental milestones, are not specific to autism. The Psychoeducational Profile (PEP-3) is primarily focused on evaluating developmental functioning and educational needs, and the Vineland Adaptive Behavior Scales assess adaptive behavior rather than being a direct screening tool for autism. Thus, the M-CHAT stands out as the most appropriate choice for screening autism risk at this specific age.