Types of Autism

Different types of ASD - Child with Autism

What are the different types of ASD?

The term ASD is an umbrella description which refers to three different diagnoses. Regardless of the specific diagnosis given, individuals with an ASD will experience difficulties in many different social situations such as school and work.


Autistic Disorder

Autistic Disorder. Sometimes referred to as classic autism

The diagnosis of autistic disorder is given to individuals with impairments in social interaction and communication as well as restricted and repetitive interests, activities and behaviours which are generally evident prior to three years of age.


Asperger’s Disorder

Asperger’s Disorder. Sometimes referred to as Asperger’s Syndrome.

Individuals with Asperger’s disorder have difficulties with social interaction and social communication as well as restricted and repetitive interests, activities and behaviours. Individuals with Asperger’s disorder do not have a significant delay in early language acquisition and there is no significant delay in cognitive abilities or self help skills. Asperger’s is often detected later than autistic disorder as speech usually develops at the expected age.


Pervasive Developmental Disorder

Pervasive Developmental Disorder - Not Otherwise Specified (PDD-NOS) (sometimes referred to as atypical autism)

The diagnosis of PDD-NOS or atypical autism is made when an individual has a marked social impairment but fails to meet full criteria for either autistic disorder or Asperger’s disorder. These individuals may also have communication impairments and/or restricted and repetitive interests, activities and behaviours.