Return to. NICHCY briefing paper, discussing how Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) fits into the category of Pervasive Developmental Disorder. www. nichcy. org/pubs/factshe/fs20txt. htm. Pervasive Developmental Disorders (PDD) information sheet compiled by NINDS, the National Institute of Neurological Disorders and Stroke. NINDS Pervasive Developmental Disorders Information Page. www. ninds. nih. gov/disorders/pdd/pdd. htm www. ninds. nih. gov/disorders/pdd/pdd. htm. What are the autistic spectrum disorders? Autism spectrum disorders are also called Pervasive Developmental disorders , because they involve delay in many areas of development. www. med. umich. edu/1libr/yourchild/autism. htm. Autism Spectrum Disorders (ASD), also known as Pervasive Developmental Disorders (PDDs), cause severe and pervasive impairment in thinking, feeling, language, and the ability to relate to others. NIMH Science News about Autism Spectrum Disorders (Pervasive Developmental Disorders) www. nimh. nih. gov/health/topics/autism-spectrum-disorder. www. nimh. nih. gov/health/topics/autism-spectrum-disorders-pervasive-developmental-disorders/index. shtml. Autism Spectrum Disorders (Pervasive Developmental Disorders) DSM-IV-TR (fourth edition, text revision)1 as two of the five pervasive developmental disorders (PDD), more often referred to today as autism spectrum disorders (ASD). www. nimh. nih. gov/health/publications/autism/complete-pu. www. nimh. nih. gov/health/publications/autism/complete-publication. shtml. It can be hard to know at first if a child has a pervasive developmental disorder (PDD). PDDs are a wide spectrum of social and communication disorders, including autism, that can be complicated to diagnose. All pervasive developmental disorders affect communication and social skills, kidshealth. org/parent/medical/learning/pervasive_develo. kidshealth. org/parent/medical/learning/pervasive_develop_disorders. html. Individuals with these disorders do not present merely with slow or limited development, but rather with development that is atypical in the pervasive but diffuse areas of functions affected. In most cases, these disorders can be detected and distinguished from other forms of developmental delay before age 3 years. www. emedicine. com/med/topic3202. htm. Embed URL. bb&ob; border-bottom : 1px solid #E2ECF5; &cb;.