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Is there any source of scrutiny you’d accept as valid criticism?

Seriously though, the burden of proof shouldn’t be on the anti-IQ crowd. IQ is a new construct, that proponents have been trying to justify for over half a century. At some point, repeated failures to convince a broader field of its utility should be evidence enough that it might not be worth investigating. Yes, sometimes there are worthy theories which receive unfair treatment, like e.g. continental drift, however even Wegener’s theory took less than 50 years to be accepted, and I bet IQ research has received orders of magnitude more funding and attention than Wegener ever did.

To date, the only evidence for IQ and the g-factor comes from the tests them selves, the construct is not used in any models outside of the field of psychometrics (while psychometrics them selves is becoming more and more fringe as a science). It’s use has historically been focused around racist conjectures and eugenics.

Even though I shouldn’t I’m still gonna give one more shot at finding evidence of the increasing irrelevance of IQ in modern science. I searched for “IQ cognitive psychology” on google scholar. While I did find some attempts of researchers trying to merge psychometrics and Cognitive Psychology, however when Dennis et.al (2009) actually went ahead and looked how useful IQ was in a common neurodevelopmental model, they found it was simply in the way:

> Using IQ as a matching variable or covariate has produced overcorrected, anomalous, and counterintuitive findings about neurocognitive function.

https://www.cambridge.org/core/journals/journal-of-the-inter...

In my search results I also found another paper, which I couldn’t access, dating all the way to 1988, which seems to be making the same case as I that IQ is on its way to the history books: https://www.tandfonline.com/doi/abs/10.1080/0168863880840087...