Stanley I. Greenspan, MD, is a clinical professor of psychiatry and pediatrics at George Washington University Medical School and chair of the Interdisciplinary Council on Developmental and Learning Disorders. He is a practicing child psychiatrist, the founding president of Zero to Three: The National Center for Infants, Toddlers, and Families, and the author or editor of more than 35 influential books. He lives in Bethesda, Maryland. Ira Glovinsky, PhD, is a practicing psychologist specializing in children with bipolar patterns of mood dysregulation and their families, and is engaged in clini...