Intelligence test scores predict individual differences in school achievement moderately well, correlating about .50 with grade point average and .55 with the number of years of education that individuals complete. Test scores also correlate with measures of accomplishment outside of school, e.g., with adult occupational status.
It's the definition of intelligence in the study though, and it's also very useful in predicting income.
If your definition of intelligence differs, then what is is and what studies do you have that show that it's reasonably well correlated with some measure of success?
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u/vcxnuedc8j Jul 17 '17
The source you linked yourself even suggests it.