IQ and SATs:
My kid, who barely saw a standardized test, got a 2280-2340? something like that and a ACT 35, scores roughly comparable, after a bit of bookwork. One of her classmates got a 2400, but he had been working on them since 7th grade. Now if SAT is some sort of IQ test, how come it correlates for most students with the ACT? How come it is so amenable to prep? What happens to kids whose parents don’t buy them books?
Gender and SATs:
When I took SATs back in the '60s, girls did better on reading and boys on math. Then they changed the test, and dah-dah, boys did better on both. I believe there have been SAT knock-offs/versions written that allow different ethnicities to rise to the top through emphasizing certain latinate words, urban settings, geographies, etc. It is endlessly morph-able to suit certain populations.