Some cases are ambiguous, as fuzzy definitions change over time. In this case, however, a name that once applied only to relatively severe cases has been intentionally expanded:
The term "Asperger's disorder" will not appear in the
DSM-5, the latest revision of the manual, and instead
its symptoms will come under the newly added "autism
spectrum disorder", which is already used widely. That
umbrella diagnosis will include children with severe
autism, who often do not talk or interact, as well as
those with milder forms.
