Background: Children with autism spectrum disorder have impairments in social behaviours that require systematic intervention. The purpose of this study was to evaluate the cool versus not cool procedure implemented in a small group (dyad). Method: The cool versus not cool procedure consisted of the researcher demonstrating the targeted behaviour…

Head Start is the largest publicly funded preschool program in the U.S., and one of its primary goals is to improve the school readiness of low-income children. As has been widely reported, the first randomized trial of Head Start in the program's history found some evidence that it is achieving this goal. Receiving one year of Head Start had…