Brief Report: Challenging Behaviors in Toddlers and Preschoolers with Angelman, Prader–Willi, and Williams Syndromes

Children with neurogenetic syndromes (NGS) experience comorbid challenging behaviors and psychopathology. We examined challenging behaviors in 86 toddlers and preschoolers across three NGS [Angelman syndrome (AS), Prader–Willi syndrome (PWS), and Williams syndrome (WS)] and 43 low-risk controls (LRC), using the Child Behavior Checklist for Ages 1½–5. Challenging behavior profiles differed across NGS, with generally elevated behaviors in AS and...