Autism spectrum disorder (ASD) is a developmental disorder that is marked by two unusual kinds of behaviors: deficits in communication and social interaction, and restricted or repetitive behaviors. In the past, children with these behaviors were diagnosed with one of a set of distinct disorders—autism, Asperger’s disorder, childhood disintegrative disorder (CDD), and pervasive developmental disorder not otherwise specified (PDD-NOS). Now these separate diagnoses are combined into what’s called the autism spectrum. Learn more about autism in children, including diagnosis and treatment, behavioral challenges, school issues, services, and controversies.

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