Shaked Koplewitz writes:

Doesn't Lynn's IQ measure also suffer from the IQ/g discrepancy that causes the Flynn effect?

That is, my understanding of the Flynn effect is that IQ doesn't exactly measure g (the true general intelligence factor) but measures some proxy that is somewhat improved by literacy/education, and for most of the 20th century those were getting better leading to improvements in apparent IQ (but not g). Shouldn't we expect sub Saharan Africans to have lower IQ relative to g (since their education and literacy systems are often terrible)?

And then the part about them seeming much smarter than a first worlder with similar IQ makes sense - they'd do equally badly at tests, but in their case it's because e.g. they barely had a chance to learn to read rather than not being smart enough to think of the answer.

(Or a slightly more complicated version of this - e.g. maybe they can read fine, but never had an education that encouraged them to consider counterfactuals so those just don't come naturally).

Yeah, this is the most important factor that I failed to cover in the post (I edited it in ten minutes later after commenters reminded me, but some of you got the email and didn't see it).

https://www.astralcodexten.com/p/highlights-from-the-comments-on-lynn