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A comment on IQ scores are falling and have been for decades (2018). Parent comment

Re:IQ scores are falling and have been for decades (2018) by fao_ on Saturday May 14, 2022 @11:49AM (#31379142)
Yep. A significant fraction of MENSA are in fact "underachievers" -- due to mental illness or poverty or something else.

source: several relatives are members

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Re:IQ scores are falling and have been for decades (2018) by OkayPhysicist on Saturday May 14, 2022 @03:35PM (#31381534)
I'd imagine there's also a strong selection bias there. It's not like being intelligent automatically makes you a member of MENSA. You also have to want to be a member of a society that uses IQ tests as a selection criteria. I'd imagine that self-selects for people who are intelligent but insecure about other facets of their life.
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