PDD or pervasive developmental disorder is a behavioral disorder of speech, communication, social interaction, and repetitive type compulsive behavior. Autism is a form of PDD. There are five types of PDD's.
1. Childhood autism
2. Asperger's syndrome
3. Childhood disintegrative disorder
4. Rett's disease
5. PDD NOS (pervasive developmental disorder not otherwise specified)
actually they all belong to PDD/Autism Spectrum
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Asperger's syndrome had higher IQ in study
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06/05/2006 postreply
07:19:48