Pervasive-developmental-disorder meaning

pər-vāsĭv
Any of several disorders, such as autism and Asperger's syndrome, characterized by severe deficits in many areas of development, including social interaction and communication, or by the presence of repetitive, stereotyped behaviors. Such disorders are usually evident in the first years of life and are often associated with some degree of mental retardation.
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Any of several disorders, including autism, that begin in childhood and are characterized by difficulties with social interaction and communication.
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Any of several developmental disorders, such as autism or Asperger's syndrome, characterized by severe deficits in social interaction and communication or by the presence of repetitive, stereotyped behaviors. Most of these disorders are evident in the first years of life.
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A group of five disorders characterized by delays in the development of multiple basic functions including socialization and communication.
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