Final answer:
Pervasive Developmental Disorder, which includes Autism Spectrum Disorder, is classified under neurodevelopmental disorders. Autism affects social interaction, communication, and may involve repetitive behaviors, with a rising prevalence rate now estimated at 1 in 88 children.
Step-by-step explanation:
Pervasive Developmental Disorder (PDD), which includes Autism Spectrum Disorder (ASD), falls under the category of neurodevelopmental disorders. These disorders typically manifest early in a child's development and are characterized by developmental deficits that produce impairments of personal, social, academic, or occupational functioning. ASD is one of the most prevalent neurodevelopmental disorders, affecting social interaction and communication skills, with a tendency for repetitive behaviors or interests. The prevalence of ASD has been increasing, and it's currently estimated that approximately 1 in 88 children are diagnosed with the disorder, with males being four times more likely to be affected than females.