This study reports clinical characteristics of developmental right-hemisphere syndrome, a nonverbal learning disability, in 20 children (mean age 9.5 years) who also manifested attention-deficit/hyperactivity disorder, graphomotor problems, and slow performance. Diagnostic criteria included emotional and interpersonal difficulties, paralinguistic communication problems, impaired visuospatial skills, and either dyscalculia or neurological signs on the left side of the body. (DB)