Her research focuses on the development of language and other aspects of behavior in children with fragile X syndrome and other neurodevelopmental disorders. More specifically, her research describes the developmental trajectories of neurodevelopmental disorders and the factors affecting those trajectories, cross-syndrome differences in language development and impairments, the occurrence and moderating roles of comorbid mental health conditions in language and behavioral development, and methods for measuring language and behavior in these populations. She has worked extensively with individuals with fragile X syndrome, autism spectrum disorder, Down syndrome, and Williams syndrome.