In a similar vein, a particularly dark chapter in the American history was the long-lasting eugenics movement, which until the 70s was sterilizing people who had low IQs
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It is a flawed metric for multiple reasons, but still - more or less - the best predictor of job performance according to meta-analyses. So, in some sense, also one of the best metrics? https://d3i71xaburhd42.cloudfront.net/0b25a19e275f2c27710beb02fda8f98ae509043e/4-Table1-1.png … (Schmidt and Hunter 1998)
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“...investigators should be extremely cautious about disseminating conclusions about IQ test validities, from correlations between IQ and job performance.”https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4557354/ …
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Just a reminder, Immunology was used by Nazis for human experimentation in the concentration camps. As to IQ tests, they measure just fine, it's just still not proven exactly what it is they are actually measuring.
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IQ is a perfectly reliable method of measuring one’s skill at taking IQ tests.
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