Which category does PDD-NOS belong to?

Pervasive Developmental Disorder- Not Otherwise Specified (PDD-NOS) is a classification used within the spectrum of pervasive developmental disorders. It encompasses individuals who exhibit some characteristics of autism or related disorders but do not fully meet the criteria for a specific autism diagnosis. This category was used to recognize that development can manifest in a variety of ways, and some individuals may have a combination of symptoms influencing their functioning without fitting entirely into the more defined categories of autism, such as Autistic Disorder or Asperger’s Syndrome.

PDD-NOS was important in acknowledging a broader array of developmental challenges and providing access to support and services for those who may otherwise be underserved due to not fitting neatly into the other specific categories. Therefore, it directly pertains to the nature of developmental disorders that impact social interaction and communication.