"Earlier this month, a press release from Yale University announced: "Prevalence of Autism in South Korea Estimated at 1 in 38 Children". This estimate was considerably higher than recent UK studies (Baird et al, and Baron-Cohen et al). There are three possibilities: either children in South Korea are at unusually high risk of autism; previous studies have dramatically underestimated the prevalence of autism; or this new study gives an overestimate.
The authors reject the first option and plump for the second. Their estimate, they maintain, is so high because they looked for children in mainstream schools, doing their own assessments of children detected on an initial screening questionnaire, rather than relying on existing diagnoses."
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Baron-Cohen et al
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