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Pervasive Developmental Disorder NOS

(Also Known As: Pervasive Developmental Disorders, Autism, Asperger's, Aspergers, Pervasive Developmental Disorder Not Otherwise Specified, Pdd-NOS, PDD)

(Reviewed by: Paul Peterson, Licensed Therapist)

What is Pervasive Developmental Disorder NOS?

PDD-NOS belongs to a group of conditions known as pervasive developmental disorders. This group is generally characterized by a delay and deviance in the development of social skills. According to the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV), pervasive developmental disorder not otherwise specified or PDD-NOS, is defined as a condition of severe, pervasive impairment in communication skills or the presence of stereotyped behavior, interests and activities with associated impairment in social interactions. 1

This condition exhibits some of the symptoms indicative of classic autism, which include difficulty socializing with others, repetitive behaviors, and heightened sensitivities to certain stimuli. 2

PDD-NOS patients differ from one another, for no two cases are exactly the same. This also holds true for patients with classic autism. When interacting with others, they may appear unemotional or unable to speak, they could have trouble holding eye contact, or they may have trouble transitioning quickly from one activity to the next. Consequently, those with PDD-NOS are sometimes thought to have a milder form of autism, though this may not be technically true. One symptom may be minor, while another may be worse. 3

Could You Have Pervasive Developmental Disorder NOS?

Pervasive Developmental Disorder NOS Topics

Related Conditions

Asperger's Syndrome – impaired social interaction, restrictive patterns of behavior, repetitive behavior, autism, clumsiness
Autism – impaired social interaction, restricted repetitive behavior, impaired social development
Childhood Disintegrative Disorder – disintegrative psychosis, developmental delay, impaired social, verbal and motor skills
Rett's Disorder – impaired social skills, autism, pervasive disorder, cognitive impairment, impaired verbal skills