You can find the study here. It's a fairly simple examination of a very large database of people doing psychometric tests online in Britainhttps://www.medrxiv.org/content/10.1101/2020.10.20.20215863v1 …
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The researchers recruited 84,000 people starting in December 2019, and mostly in the months of January and May 2020, to do a series of tests that measure cognitive ability (not IQ per se, but similar in nature)
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They found that those who reported having more symptoms consistent with COVID-19 had a lower score on these cognitive tests, and therefore concluded that "COVID-19 infection likely has consequences for cognitive function" Scary!pic.twitter.com/RREN4DWHGQ
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But astute readers will probably already see an issue here If they recruited starting in December, and had many responses in January in Britain...how could these people have been COVID-19 patients?
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Long story short: they weren't. Of the 84,000 people who did the cognitive tests, only ~361~ reported having a confirmed case of COVID-19 That's, uh, not idealpic.twitter.com/18JzpMih74
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Now, while this did represent the majority of hospitalized cases, it's still a bit of a problem for a paper looking at COVID-19 specifically to have very few cases of COVID-19 to examine!
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I think it's probably fair to say that the results show that people who have recently experienced a major hospitalization have worse cognitive processing than people who haven't
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I definitely don't think that you can infer from this research anything in particular about COVID-19 infections and IQ in general
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End of conversation
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That explains
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