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/subhumanprimate]

These sort of tests are so skewed to experience

Take the ball and the bat where together they cost 1.10 ... If you are used to puzzles like this it's simple but if you aren't it's much harder. But you might be more familiar with other sort of logical tests that if they had used the type of puzzle you were used to you would do better

They aren't good predictions of real world success they just measure how familiar you are at that particular sort of puzzle

[u/ikonoclasm → u/subhumanprimate]

I believe you're closer to the author's point than you may realize. You're describing the difference between solving a novel problem versus applying a previously identified specific solution more broadly. The first would be a rationality test as the author defines it: the person has all of the necessary information in a novel scenario and may obtain the correct answer. The second is more a traditional test of intelligence by recognizing the original puzzle in a new context, recalling the prior solution, and applying it.

In either scenario, then, the cognitive abilities of a person are tested and would both fall under the general definition of "intelligence" for the purpose of an IQ test, though the author here is pointing out there are actually two distinct traits which both heavily correlate with "intelligence" to the point of being directly related, which is why failing to control for that variable in testing doesn't actually impact scoring for intelligence.

[u/subhumanprimate → u/ikonoclasm]

that's a good point.