Language assessment and treatment for children with developmental disabilities from birth to age five, including information on legislation impacting early intervention (birth to age two) and programs for three- to five-year-olds; clinical symptom complexes; diagnostic criteria; and speech, oral motor, and language evaluation and treatment resources. Focuses on infants and young children with language and speech delays and disorders, with an emphasis on the special needs populations with Autism spectrum disorders, fetal alcohol syndrome, drug exposure, Fragile X syndrome, and Down syndrome.