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The diagnosis of a pervasive developmental disorder not otherwise specified was given to individuals with difficulties in the areas of social interaction, communication, and/or stereotypic behavior patterns or interests, but who did not meet the full DSM-IV criteria for autism or another PDD.
The pervasive developmental disorders were: [4] Pervasive developmental disorder not otherwise specified (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses); [10] Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD).
As a pervasive developmental disorder, Asperger syndrome is distinguished by a pattern of symptoms rather than a single symptom. It is characterized by qualitative impairment in social interaction, by stereotyped and restricted patterns of behavior, activities, and interests, and by no clinically significant delay in cognitive development or ...
This is a list of mental disorders as defined in the DSM-IV, the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders.Published by the American Psychiatry Association (APA), it was released in May 1994, [1] superseding the DSM-III-R (1987).
Autism spectrum disorder is a new diagnosis that incorporates the former diagnoses of classic autism, Asperger disorder, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified (PDD-NOS)—see Diagnosis of Asperger syndrome § DSM-5 changes. [14]
These disorders differ from Pervasive developmental disorders (PPD), which uniquely describe a group of five developmental diagnoses, one of which is autism spectrum disorders (ASD). Pervasive developmental disorders reference a limited number of conditions whereas development disorders are a broad network of social, communicative, physical ...
The definition of pervasive developmental disorder not otherwise specified was changed back to what it was in DSM-III-R and the text for Asperger's disorder was practically entirely rewritten. Most other changes were to the associated features sections of diagnoses that contained additional information such as lab findings, demographic ...
ASD encompasses previous diagnoses, including the four traditional diagnoses of autism—classic autism, Asperger syndrome, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified (PDD-NOS)—and the range of diagnoses that included the word "autism". [70]