- What is an authoritative empirical estimate of the correlation between pscyhometric measures of intelligence and Grade Point Average (GPA)?
- What are the main factors that influence the size of the correlation? E.g., country, level of schooling (e.g., primary, secondary, university), method of GPA measurement, etc.
Specifically, I'm interested in estimates derived ideally from meta-analyses. But estimates based on large sample studies would also be welcome.