Twin study suggests rationality and intelligence share the same genetic roots - the study suggests that being irrational, or making illogical choices, might simply be another way of measuring lower intelligence.

[u/mvea]

https://www.psypost.org/twin-study-suggests-rationality-and-intelligence-share-the-same-genetic-roots/

[u/Sinai]

That's the great thing about quantitative testing, because you can show exactly how much more often dumb people make of wrong decisions in different situations, and then you have learned something about how much more or less intelligence matters in different situations.

[u/demonicneon → u/Sinai]

Who decides what is irrational though?

[u/RudeHero → u/[deleted]]

10% of test subjects get it right and that test was replicated.

Ha! For questions like that (and the "two items total $1.10" one in the article) I suspect a lot of it has to do with motivation. I.e., that 10% goes up if you promise to give them a hundred bucks if they get it right. I just wonder by how much

OP's article does suggest motivation as a target for follow up studies