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Types of Autism Spectrum Disorder
This section of the website contains information about autism spectrum disorders – also known as ASDs, autism spectrum conditions or pervasive developmental disorders – and the different sub-types.
People on the autism spectrum have difficulties with social interactions, social communication, and imagination – sometimes known as the triad of impairments. They also demonstrate a narrow, repetitive range of interests and behaviours.
There are four main sub-types of autism spectrum disorder
- Autism, also known as autistic disorder, childhood autism, early infantile autism, Kanner’s syndrome or infantile psychosis.
- Asperger syndrome, also known as Asperger’s disorder or simply Asperger’s.
- Childhood Disintegrative Disorder, also known as CDD, dementia infantalis, disintegrative psychosis or Heller’s syndrome.
- Pervasive Developmental Disorder (Not Otherwise Specified), also known as PDD (NOS) or atypical autism.
Rett syndrome is no longer considered to be a sub-type of autism, although individuals with Rett syndrome may display autistic-like symptoms.
The term ‘autism’ is sometimes used interchangeably with the term ‘autism spectrum disorders’ to mean any or all of the different forms of ASD.
Asperger SyndromeAutism (Autistic Disorder)Autism Spectrum DisordersChildhood Disintegrative DisorderPervasive Developmental Disorder (Not Otherwise Specified)Back To Top
