The autism spectrum, also called autism spectrum disorders (ASD) or autism spectrum conditions (ASC), with the word<unk>  sometimes replacing autism, is a spectrum of psychological conditions characterized by widespread abnormalities of social interactions and communication, as well as severely restricted interests and highly repetitive behavior. A 2005 review estimated a prevalence of 6.0–6.5 per 1,000 for ASD. Of the various forms of ASD, pervasive developmental disorder not otherwise specified (PDD-NOS) was the vast majority, autism was at least 1.3 per 1,000, and Asperger syndrome was about 0.3 per 1,000; the atypical forms childhood disintegrative disorder and Rett syndrome were much rarer.
Autistic spectrum
High-functioning autism
Obsessive-Compulsive Spectrum Disorder
Autism spectrum disorder
Conduct disorder
Tourette syndrome
Oppositional defiant disorder
Childhood disintegrative disorder