If a Psychologist Wanted to Test Spearman's Concept of a "G

Multiple Choice

If a psychologist wanted to test Spearman's concept of a "g" factor in intelligence, what kind of data should the psychologist collect?

A) correlations between performances on various intellectual tasks
B) information on similarities and differences in the IQ scores of identical twins reared in separate environments
C) data on the means and standard deviations for people of various ages when they take IQ tests
D) surveys of whether psychologists believe that IQ tests actually measure intelligence