Editing Pervasive developmental disorder (section)

===Classification===
The pervasive developmental disorders were:<ref name="NICHCY"/>
* [[Pervasive developmental disorder not otherwise specified]] (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses);<ref>{{cite web |year=2012 |title= Prevalence of Autism Spectrum Disorders — Autism and Developmental Disabilities Monitoring Network, 14 Sites, United States, 2008 |author= ((Jon Baio, EdS, National Center on Birth Defects and Developmental Disabilities, CDC)) |url=https://www.cdc.gov/mmwr/preview/mmwrhtml/ss6103a1.htm }}</ref>
* Typical [[autism]], the best-known;
* [[Asperger syndrome]] (9% of autism diagnoses);
* [[Rett syndrome]]; and
* [[Childhood disintegrative disorder]] (CDD).
The first three of these disorders are commonly called the [[autism spectrum disorder]]s; the last two disorders are much rarer, and are sometimes placed in the autism spectrum and sometimes not.<ref name="Lord C, Cook EH, Leventhal BL, Amaral DG 2000 355–63"/><ref name="Johnson"/>

In May 2013, the ''[[Diagnostic and Statistical Manual]]–5th Edition'' (''DSM-5'') was released, updating the classification for pervasive developmental disorders. The grouping of disorders, including PDD-NOS, autism, Asperger syndrome, Rett syndrome, and CDD, has been removed and replaced with the general term of [[autism spectrum disorder]]s (ASDs). The American Psychiatric Association has concluded that using the general diagnosis of ASD supports more accurate diagnoses. The grouping of these disorders into ASD also reflects that autism is characterized by common symptoms and should therefore bear a single diagnostic term. In order to distinguish between the different disorders, the DSM-5 employs severity levels. The severity levels take into account required support, restricted interests and repetitive behaviors, and deficits in social communication.<ref>{{cite web|author=Autism Research Institute|title=DSM-V: What Changes May Mean|url=http://www.autism.com/index.php/news_dsmV|access-date=29 June 2013}}</ref>