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#302 – Richard Haier: IQ Tests, Human Intelligence, and Group Differences
Lex Fridman Podcast
Is There a G Factor?
IQ is a score. And IQ, an IQ score is a very good estimate of the G factor. You can't measure G directly. There's no direct measure. But an IQ scores is a good estimate. Why? Because a standard IQ test is a battery of different mental abilities. So you combine it into one score and that score is highly correlated with the G factor - even if you get better scores on some sub tests than others. This concept is ubiquitous. It doesn't matter which battery of tests you use. Your skill at poker is not unrelated to G. When you do batteries of tests in different cultures, you get the same thing. The intelligent brain was when I first heard
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