Quick thing about IQ tests.
When comparing 2 people who score say 5-10 points different on an IQ test, this small, and even medium differences may not be able to say clearly which person is "smarter." Certainly a higher score is some evidence but not overwhelming. (You may know some people you scored better than on the SAT, but are not convinced that you are smarter than them, and you may know people who scored higher than you that you don't consider incredibly sharp.)
HOWEVER. When an IQ test is given to a group, and one group does significantly better than the other, you can say that one group is smarter than the other.
You can no longer make the excuse of "IQ tests are dumb and don't measure everything, blah blah.."
Just letting you know.
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