The first one was intentionally minimalist in order to see how little it took for racial bias to be reconstructed. For the second, any mental ability test corr

The first one was intentionally minimalist in order to see how little it took for racial bias to be reconstructed. For the second, any mental ability test correlates with IQ, so you end up with a different set of difficulties. There have been attempts to, e.g. correct for cultural bias in the tests, but these actually made the problems worse. I'm not presently aware of anything that makes that situation better.