>>1894635We try to estimate intelligence tons of different ways. I am assuming you know basic statistics from here on out. All the ways we try to measure intelligence correlate with each other (they are mathematically related to each other). This forms an undeniable pattern. There seems to be a "General Intelligence" factor that explains the correlation of all these various measures of intelligence (Ravens pattern tests, repeating numbers backwards, synonym/antonym tests, etc). It is statistically useful to call this "thing" -- which we don't directly measure--G. Once we have a variable to work with, G, we can eliminate and tweak the various tests of intelligence we currently use so there is congruence amongst the tests. The we have, hopefully, a more precise and useful definition of Intelligence, and we can study Intelligence independent of things like how much your grandfather made a year.
