For many years, autism was an “umbrella” diagnosis that covered:
Pervasive developmental disorder, not otherwise specified (PDD-NOS)
Childhood disintegrative disorder (CDD or Heller’s syndrome)
This changed in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). In the DSM-5, Asperger’s syndrome, PDD-NOS, and CDD are no longer listed as diagnoses. There is only one diagnosis of “autism spectrum disorder.” (Rett syndrome is now listed as a separate genetic disorder.)
Autism isn’t a learning disability, but it can affect learning.
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