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Right, IQ measures some abstract mental capacity, not knowledge. It's not very useful on its own.
by msgodel 1y ago
Right, IQ measures some abstract mental capacity, not knowledge. It's not very useful on its own.
- tptacek 1y agoIt's probably more accurate to say that IQ is a useful indicator of many specific cognitive deficits, and basically unuseful within or above 2SD of the center.
- msgodel 1y agoNo. even within 1SD there are huge qualitative differences in what people are capable of.
- tptacek 1y agoThere are huge qualitative differences between cognitive ability between pairs of people within that range, but IQ stops accurately selecting the more capable of the two. It gets worse as the scores get higher. IQ is not a ranking of cognitive ability.
- msgodel 1y agoMy understanding is that people 75% of a standard deviation bellow average tend to struggle with basic thought experiments. Yeah when you get into the upper tail it starts to get hard to find things to differentiate people.