The-definition.com

Definition

Pervasive Developmental Disorder (PDD)

Pervasive Developmental Disorder (PDD) is a class of neurological disorders usually evident by age 3. They are characterized by severe and pervasive impairment in social interaction skills, communication skills and possibly by stereotyped behavior, interests and activities. Pervasive Developmental Disorders include autism, Asperger’s syndrome and nonverbal learning disorder.

References
Share it:  Cite

More from this Section

  • Esophagus
    The esophagus is a tubular structure about 10 in. (25 cm) long that is continuous above ...
  • Liver
    The liver is the largest gland in the body and has a wide variety of functions. ...
  • Descending Colon
    The descending colon is about 10 in. (25 cm) long and lies in the left upper and lower ...
  • Corporate Campaign
    A corporate campaign is an organized effort by the union that exerts pressure on the corporation ...
  • Therapy
    Therapy is the treatment of physical, mental or behavioral problems that is meant to cure ...