Have you noticed the people who disbelieve IQ (actually, the grade boundaries) want to keep the SATs, the idea of grades in general (instead of pass/fail), grading on a curve (not a true standard of knowledge) and GPAs?
That sounds like the most complex ANOVA of all time. It could be another test but it sounds like that from the fact they crack down on causes and correlates.
I’ve seen databases of information like that, they’ll make you cry.
If you could do that for annual adult income… oh boy.
The HBD reddit would be pleased.