Figure 1. Flow Diagram of the Recruitment Process.

Children were recruited from those diagnosed with autism spectrum disorder (ASD) via multidisciplinary assessment at Boston Children’s Hospital (BCH) at 12 to 36 months of age, and ultimately 213 completed research study measures. DCF indicates Department for Children and Families.

^aThree children had a cognitive level of less than 13 months of age and were unable to engage in research measures; 1 child was nonadherent with testing and results were deemed to be not valid by research psychologists.

^bResponses of 1 parent to the parent questionnaires were unreliable based on manual provided for survey instruments.