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Pervasive Developmental Disorder (PDD)
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Pervasive Developmental Disorder, or PDD, is a general term for a spectrum of disorders that share a pervasive and qualitative impairment in some or all of the following areas of development:
The behaviors are qualitatively distinct from those expected from children of the same developmental age. A reference to Pervasive Developmental Disorder is a reference to a spectrum of disorders, including Autistic Disorder, Pervasive Developmental Disorder, Not Otherwise Specified (PDD-NOS), Asperger’s Disorder, Rett’s Disorder and Childhood Disintegrative Disorder. The term PDD is a medical term often used interchangeably in the general public with the term Autism Spectrum Disorder (ASD). This can be confusing due to the fact that Rett’s Disorder and Childhood Disintegrative Disorder are not a part of the Autism Spectrum and Autism, PDD-NOS and Asperger’s are. In addition, PDD and PDD-NOS should be seen as distinct. PDD is the term used to identify the “umbrella” that describes the above disorders, while PDD-NOS is a specific disorder within the “umbrella”.
For more information about autism and other Pervasive Developmental Disorders, please visit:
NIMH - Autism - Online Publication
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