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>The mere fact that the results of these types of tests on large population groups tend to follow a normal distribution. The results do not follow a normal dis
by Kranar 5y ago
>The mere fact that the results of these types of tests on large population groups tend to follow a normal distribution.
The results do not follow a normal distribution though. IQ is forced into a normal distribution with a standard deviation of 15 by definition, it is constructed in such a way that it's forced into that distribution. The actual measurements, ie. raw test scores, are not normally distributed.
- NoImmatureAdHom 5y agoI think you're conflating IQ and all the other things parent talks about. Almost by definition with these sorts of processes we'll see Gaussian curves.
- xyzzyz 5y agoThe raw test scores are normally distributed. This much is pretty much forced by the central limit theorem. Now, of course, the raw score distribution does not have mean of 100 and standard deviation of 15, but that’s just a norming issue, to make it useful to compare across the tests.