The Wiki page is voluminous enough to approach gish galloping, and the Talk page is almost as big https://en.wikipedia.org/wiki/G_factor_(psychometrics)
Asking because someone in another forum basically said that while IQ might be discredited, “g” is valid.
The vibe I always got is that it’s somewhat more sinister than IQ, in that it’s purported to be an Actually Real Property of humans that’s measured by IQ tests, when IQ tests in themselves don’t necessarily make claims beyond raw statistical variance.
It’s like talk around IQ got too careful so they made this as a sort of anti-euphemism. Disphemism??
edit: wow it’s a real word