Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Pervasive Developmental Disorder NOS

  • Fred R. VolkmarEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_1585


Atypical autism; Autism spectrum disorder

Short Description/Definition

Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) is the subthreshold disorder in the PDD class of conditions in the DSM-IV-TR (American Psychiatric Association 2000). The individual with PDD-NOS does not meet the criteria for autistic disorder or other specifically defined PDDs but does exhibit problems in social interaction and either communication anomalies or unusual behavior suggestive of a diagnosis in this category. In contrast, ICD-10 (World Health Organization 1994) terms the condition atypical autism and allows for specification of the ways in which the case is subthreshold, e.g., relative to criterion threshold or age of onset. The category has now been eliminated from DSM-5.


Although first recognized officially in DSM-III (1980), in many respects this concept has its roots in the much earlier observations of individuals like Rank (1949) and Asperger (1944), who...

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References and Readings

  1. American Psychiatric Association. (2000). Diagnostic and statistical manual (4th ed. – Text revision).Washington, DC: APA Press.Google Scholar
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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Child Study Center, Child Psychiatry, Pediatrics and Psychology, Yale University School of MedicineNew HavenUSA