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American IQ scores have rapidly dropped, proving the 'Reverse Flynn effect'

(www.popularmechanics.com)
256 points hirundo | 1 comments | 10 Apr 23 13:00 UTC | HN request time: 0.254s | source
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rahimnathwani ◴[10 Apr 23 16:58 UTC] No.35514446[source]▶
This blog post asserts that IQ scores didn't drop for the population as a whole, and that the drop for each individual group is due to changing composition of that group:

https://emilkirkegaard.dk/en/2023/03/new-study-didnt-really-...

For example, if the % of people who do a postgraduate degree goes doubles, it's no longer such a select group, so you'd expect the average IQ of postgraduate degree holders to go down. This doesn't mean IQ scores are going down for the population as a whole.

One more thing: why do so many papers that present charts that show how a mean or median changes over time, without also presenting charts that show how the distribution has changed over time?

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itronitron ◴[10 Apr 23 22:12 UTC] No.35518020[source]▶
What does it mean for a % of something to 'goes doubles' ?
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1. thaumasiotes ◴[11 Apr 23 01:46 UTC] No.35519688[source]▶
It means the sentence was edited before posting. Someone tried to replace "goes up" with "doubles", but forgot to delete the "goes".