What is the difference between autism and PDD,NOS?
A child who does not meet enough of the criteria for a diagnosis of one of the ASDs, but displays similar behaviors, or displays these behaviors at sub-threshold levels, may receive a diagnosis of Pervasive Developmental Disorder, Not Otherwise Specified (PDD,NOS). In terms of interventions, PDD,NOS should, for all intents and purposes, be treated just as you would treat a diagnosis of Autistic Disorder.
