In the early 1990s, the diagnostic criteria for autism were broadened. Subsequent to that, screening programs were implemented in schools. Here's a hint: If you don't look for something, you will find a lot less of it. If you look harder for something, you will find more of it.1/ https://twitter.com/AQuantumCat1/status/1399982466790793221 …
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This post is three years old, but it's the same story that antivaxxers have been pulling at least as long as I've been paying attention to them (close to two decades). 3/https://sciencebasedmedicine.org/autism-prevalence-increases-to-1-in-59-and-antivaxers-lose-it-yet-again/ …
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Basically, when you take into account changes in diagnostic criteria and other confounders, it turns out that the prevalence of autism hasn't changed in decades. 4/4https://sciencebasedmedicine.org/autism-prevalence-unchanged-in-20-years/ …
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