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What Is Pervasive Developmental Disorder?

Often referred to as PDD, pervasive developmental disorder is an umbrella term that refers to several conditions sharing some characteristics related to a delay in communication and socialization skills. Examples include:
   
Children with these conditions vary widely in abilities, intelligence, and behaviors. Common symptoms include:
 
  • Difficulty with changes in routine or familiar surroundings
  • Problems with using and understanding language
  • Difficulty relating to people, objects, and events.
 
Unusual responses to loud noises, lights, and other sensory information are also common. In most cases, the onset of a PDD occurs before a child turns three years old.
 
(Click Pervasive Developmental Disorder to learn more about PDD and its symptoms, treatment, and prognosis.)

What Is Pervasive Developmental Disorder?

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