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This paper found a 0.82 correlation between general mental ability g and SAT scores https://archive.org/details/ScholasticAssessmentOrG/page/n1/mode/2up https:

• Retric 4y ago
  That’s relatively low considering what kind of test it is. Elementary school sees a 0.7 correlation between IQ and academic performance.
  • yCombLinks 4y ago
    .82 is an insanely high correlation in any kind of social science
    • Retric 4y ago
      A benchmark of everything across all of social sciences is extremely broad when comparing two different tests of mental performance designed to correlate with other tests of mental performance. It’s like being shocked that resting heart rate and VO2 Max happen to correlate quite well relative to other health indicators. Yes they are testing different things, but not that different.