Medically reviewed by Kira Graves, PhD A diagnosis of autism spectrum disorder (ASD), or autism, involves one of three levels. Standards for the three types of ASD are listed in the Diagnostic and ...

Levels of Autism Per the DSM, there are three levels of autism. Level 1 autism includes people of average or above-average intelligence who can lead largely independent lives.

Autism has at least four subtypes, an analysis of more than 5,000 children’s genes, traits and developmental trajectories has ...