We are collaborating with Dr. Adriana DiMartino at Child Mind Institute to investigate brain and behavioral changes in children with autism spectrum disorder over the first five years of life. Through the use of natural sleep MRIs, the project aims to identify the neurobiological underpinnings of early developmental changes in restricted repetitive behavior/interests (RRB) – one of the most clinically impairing aspects of ASD - and their predictive contribution to behavioral outcomes.