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TimS comments on Rationality Quotes Thread January 2016 - Less Wrong
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This would mean the IQ scores are meaningless for cross-country comparison. And that just aint' so.
That's not what that link says - best I can tell, the book summarized states living in a high-IQ country is more predictive of good life outcomes than your own IQ.
Getting down to brass tacks, we are assuming a lot when we compare IQ numbers from different tests. WIAS-IV is not necessarily comparable to other tests in English. Assuming that the French language test measures the same thing as the WIAS-IV assumes the very conclusion that I'm not agreeing with. (Although I'm not arguing this point in our other discussion).
You keep on saying "assuming" and Vaniver keeps on telling you that there is no need for assumptions: we have data. It's not hard to give the same people different tests and then look at how do the scores correlate.
In fact, that's how the whole concept of IQ came into being -- IQ is an estimate of the general intelligence component (g) that is common to performance on a variety of intelligence-measuring tests.