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The diagnostic category pervasive developmental disorders (PDD), as opposed to specific developmental disorders (SDD), was a group of disorders characterized by delays in the development of multiple basic functions including socialization and communication. It was defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM) (from ...
Retrieved 25 September 2022. Childhood disintegrative disorder, also known as Heller's syndrome and disintegrative psychosis, is a rare condition characterized by late onset of developmental delays in language, social function, and motor skills. Researchers have not been successful in finding a cause for the disorder.
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 ...
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]
Autism, also called autism spectrum disorder[a] (ASD), is a neurodevelopmental disorder characterized by symptoms of deficient reciprocal social communication and the presence of restricted, repetitive, and inflexible patterns of behavior. Autism generally affects a person's ability to understand and connect with others, as well as their ...
from birth. Pervasive developmental disorder not otherwise specified (PDD-NOS) [1] is a historic psychiatric diagnosis first defined in 1980 that has since been incorporated into autism spectrum disorder in the DSM-5 (2013). According to the earlier DSM-IV, PDD-NOS referred to "mild or severe pervasive deficits in the development of reciprocal ...
Reactive attachment disorder. Reactive attachment disorder (RAD) is described in clinical literature as a severe disorder that can affect children, although these issues do occasionally persist into adulthood. [ 1 ][ 2 ][ 3 ] RAD is characterized by markedly disturbed and developmentally inappropriate ways of relating socially in most contexts.
The Lancet MMR autism fraud centered on the publication in February 1998 of a fraudulent research paper titled "Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children" in The Lancet. [1] The paper, authored by now discredited and deregistered Andrew Wakefield, and twelve coauthors, falsely ...