These researchers looked at studies of cognition specifically, and did very little to control for the variety of measures of cognition that are out there or their disciplinary or general context from what I can tell.
It’s yet another scientific facet of our lives that’s been politicized.
In that context, this study literally is non-sensical.
In fact that's the conclusion of the study here.
Isn't it a contradictory definition? If someone is intelligent then it will learn to improve on a test, otherwise, it's not intelligent. Maybe we should take the gradient of the IQ scores.
There is no reason to believe that regions of the brain often tested in IQ tests can't develop overtime increasing ones score. Sure it almost never happens since most people never engage in activities that would strengthen it, but it's silly to think it can't.
Innate intelligence assumes the brain is static and cannot change, which has been proven to be false.
That said, are there really any other viable ways to measure intelligence in a standardized and reproducible manner?