This section of the website contains information about the different types of autism - also known as autism spectrum conditions, autism spectrum disorders, ASDs or pervasive developmental disorders.
There are four main sub-types of autism that were previouisly recognised within the Diagnostic and Statistical Manual of Mental Disorders and within the International Classification of Diseases and Related Health Problems.
However the fifth edition of Diagnostic and Statistical Manual of Mental Disorders, DSM-5, published in May 2013 eliminated the four sub-types listed above by dissolving them into one diagnosis called Autism Spectrum Disorder. The 11th edition of the International Classification of Diseases and Related Health Problems, which is due for publication in 2019, is likely to do the same.
Please note: At present, the term 'autism' is sometimes used interchangeably with the term 'autism spectrum disorders' to mean any or all of the different forms of ASD. It is also sometimes used interchangeably with the term 'autistic disorder'.