This paper used Social Security Administration program data from 2005 to 2019 to examine national- and state-level changes in the number of new adult supplemental security income (SSI) awardees on the autism spectrum relative to awardees with intellectual disability and other mental health disorders. We identified three main findings: the number…

This article reviews 32 epidemiological studies of pervasive developmental disorders (PDDs) published between 1966-2001. The design and sample characteristics of the surveys are described. Surveys have suggested that the rate for all forms of PDDs are around 30/10,000, but more recent surveys suggest it might be as high as 60/10,000. (Contains…