Pervasive Developmental Disorders (PDD) /​ Autism Spectrum Disorders (ASD)

Pervasive devel­op­men­tal dis­or­der (PDD) refers to a group of dis­or­ders char­ac­ter­ized by delays in the devel­op­ment of social­iza­tion and com­mu­ni­ca­tion skills. There are sev­eral types of per­va­sive devel­op­men­tal dis­or­der, more com­monly known as autism spec­trum dis­or­der (ASD). The three main types of ASDs include: autism; Asperger's syndrome; and Pervasive Developmental Disorder-​​Not Otherwise Specified (PDD-​​NOS). There are also two rare ASDs: Rett syn­drome and Childhood Disintegrative Disorder.

National Dissemination Center for Children with Disabilities (NICHCY): Autism Spectrum Disorders

IAN (Interactive Autism Network): About ASDs

IAN (Interactive Autism Network): Challenging Behaviors of ASDs

Autism:

Symptoms of Autism NOT Listed in the Diagnostic Literature

Autism Resource, Acronyms, Terms, Jargon: Terms and Definitions You'll Need to Know

National Institute for Mental Health

Autism Speaks

Autism Society of America

Autism Collaboration

Top Treatments for Autism

National Institute of Neurological Disorders and Stroke (NINDS) Autism Fact Sheet

Asperger's Syndrome:

Asperger's Disorder

OASIS@MAAP
Online Asperger Syndrome Information and Support (OASIS) cen­ter has joined with MAAP Services for Autism and Asperger's Syndrome.

LD and Aspergers: Understanding the Differences

Pervasive Developmental Disorder - Not Otherwise Specified (PDD - NOS):

What is PDD-​​NOS?

Autism Speaks: PDD-​​NOS

Rett Syndrome:

Autism Speaks: Rett Syndrome

International Rett Syndrome Foundation

Childhood Disintegrative Disorder:

Childhood Disintegrative Disorder