Anyone notice this:

IQ tests were designed by Europeans, with the idea of using 100 as an average score.

And lo and behold! Europeans have an average score of 100!!

That fact alone should be enough to tell you that IQ scores are not culturally independent, no matter how hard the test designers try to make them so.

Such "average" scores are criticized for one other reason as well: individual variation within a given group generally far exceeds the differences in averages between groups. So as a tool of social policy or analysis, it's useless.

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Man up.