International Review of Research in Developmental Disabilities, Volume 55, provides a scholarly look at research on the causes, effects, classification systems and syndromes of developmental disabilities. Chapters in this new release include topics such as, Sensory Dysfunction Across Developmental Disabilities, The Role of natural communication partners in early communicate interventions for children with IDD, Adult employment in ID, The Future of Interventions to Foster Early Motor Development in Children with IDD, Developmental Perspectives of Problem Behaviors in DD. Contributors in this ongoing series come from wide-ranging perspectives, including genetics, psychology, education, and other health and behavioral sciences.