Validation of the Observer-Reported Communication Ability (ORCA) Measure for Individuals with Angelman Syndrome - Zigler, Christina K.; Lin, Li; McFatrich, Molly; Lucas, Nicole; Gordon, Kelly L.; Jones, Harrison N.; Berent, Allyson; Panagoulias, Jennifer; Evans, Paula; Reeve, Bryce B. (American Journal on Intellectual and Developmental Disabilities, 2023)