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Autism Spectrum Disorder Autism spectrum disorder is a new DSM-5 name that reflects a scientific consensus that four previously separate disorders are actually a single condition with different levels of symptom severity in two core domains.

The changes in DSM-5 to Autism Spectrum Disorder are as follows: Because both components are required for diagnosis of ASD, social communication disorder is diagnosed if no RRBs are present.
 * 1) ASD now encompasses the previous DSM-IV:
 * autistic disorder (autism)
 * Asperger’s disorder
 * childhood disintegrative disorder
 * pervasive developmental disorder not otherwise specified.
 * 1) ASD is characterized by:
 * deficits in social communication and social interaction
 * restricted repetitive behaviors, interests, and activities (RRBs).

Section 1: Demographic Information

Table 1: Base rates of ASD in Children and Adolescents (in different Clinical Populations)