Pervasive Developmental Disorder (PDD)

According to the NIH, Pervasive Developmental Disorders (PDD) refers to a group of disorders including Autism, Asperger’s Syndrome, Childhood Disintegrative Disorder, and Rett's Syndrome. PDD is characterized by delays in many areas of development. While symptoms of PDD may appear as early as infancy, the typical age of onset and diagnosis is around 3 years of age. A child with PDD may demonstrate delays and problems across all realms of development including receptive and expressive language, social and emotional interactions, sensory motor, and play. A child with PDD may also exhibit difficulty transitioning from one activity to the next, s/he may also appear to be unable to attend to a communication partner, activity or task, demonstrate repetitive body movements, and may be unable to sit in one position for any length of time.


Children with PDD will vary greatly in their abilities. While some children may not speak at all, others may have limited language, and still others may appear to have typical age appropriate language. Many children with PDD will exhibit limited play skills and will not interact socially nor will they play collaboratively with other children. Rather they will exhibit peripheral parallel play. Some children with PDD may exhibit sensory defensiveness and react unusually to light, touch, and sounds, while others may seek out and desire these sensory stimuli.

Early intervention services are paramount in the treatment of PDD. If you suspect that your child has PDD it is important that you express your concerns to a qualified pediatrician. S/he can refer you for a proper evaluation which can determine the need for early intervention services. Very often, speech-language therapy when paired with occupational and physical therapy, and special instruction can serve your child’s needs and support him/her in his/her journey upon a successful life.