This is certainly not something that can be answered with a simple Yes or No.

I am by no means saying that the underlying traits are casually related — only that metrics which predict one may also predict the other.

The human brain is a complex system and IQ itself is a very simplistic way to characterize it.

Think of it this way: imagine IQ is like electricity powering a city. Different city configurations have very different power and load requirements. You might find that, in general, cities with more power function better.

But perhaps the well functioning cities also had better transmission infrastructure. If you applied the rule of “more power is better” to a city without that infrastructure it would blow fuses everywhere and cause chaos.

With this example aside, In fact the science does say that there is a relationship: https://www.nature.com/articles/s41380-018-0332-x?WT.feed_na...