[mediaman]

There is no evidence that the SAT is a function of practice and training, and a lot of evidence that training has only a small impact on SAT scores.

See, for example: https://nepc.colorado.edu/sites/default/files/Briggs_Theeffe...

https://www.researchgate.net/profile/Benjamin_Domingue/publi...

These controlled studies show an impact of something like 10-35 points from coaching and other prep.

[burkaman]

I didn't really mean SAT-specific coaching or practice tests, I meant more general practice and training as a result of your education. Like if you grew up in a rich neighborhood, on average you probably had better training on SAT-related skills over your 10 years of school, a better environment to practice those skills, etc.