A previously diagnosed disorder similar to autism in which people do not generally have major deficits in language, cognitive development, adaptive functioning, or curiosity about the environment is

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Asperger's disorder was previously diagnosed as a separate disorder from autism but is now considered Level 1 autism. Individuals with Asperger's disorder/Level 1 autism may have difficulties with social interactions and restricted interests but typically have normal language development and intelligence. Rett's disorder is a rare genetic disorder that primarily affects girls and involves severe cognitive and developmental disabilities. Pervasive developmental disorder, Level 3, is a diagnosis that is no longer used, but it previously referred to individuals who had significant impairments in social, communication, and adaptive functioning but did not meet criteria for autism or other related disorders.

A Previously Diagnosed Disorder Similar to Autism in Which People