Pervasive Developmental Disorder (PDD)
The diagnostic category pervasive developmental disorders (PDD), as opposed to specific developmental disorders (SDD), refers to a group of five disorders characterized by delays in the development of multiple basic functions including socialization and communication that have traditionally been referred to as Autism.
Parents may note symptoms of PDD as early as infancy and typically onset is prior to three years of age. PDD itself does not affect life expectancy.
The term was introduced by the APA in 1980.
Source: “Pervasive developmental disorder”. (2010, November 22). In Wikipedia, The Free Encyclopedia. Retrieved 15:52, November 29, 2010, from
http://en.wikipedia.org/w/index.php?title=Pervasive_developmental_disorder&oldid=398315167
