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What are the four forms of autism in the autism spectrum?

Answer:
Pervasive developmental disorders, often known as autism spectrum disorders, include the following conditions.
  • autism
  • Asperger's Syndrome (AS)
  • pervasive developmental disorder not otherwise specified (PDD-NOS)
  • Rett Syndrome
  • childhood disintegrative disorder (CDD)

Sometimes, the term autism spectrum disorder refers only to autism, Asperger's Syndrome, and PDD-NOS. It has been mentioned that in future editions, the Diagnostic and Statistical Manual of Mental Disorders (DSM) will remove Asperger's Syndrome as a separate condition, including it under autism.

Some of these conditions can be known by alternate terms:
  • Autism can also be referred to as Kanner syndrome, early infantile autism, or childhood autism.
  • Asperger's Syndrome might be the same as high-functioning autism.
  • Pervasive developmental disorder not otherwise specified can also be called atypical autism.
First answer by Ljyoung13. Last edit by Ljyoung13. Contributor trust: 407 [recommend contributor recommended]. Question popularity: 1 [recommend question].