/lit/ - Literature

>>15731668
>Comparing SDs between distributions of unequal kurtosis is a methodological error.
I never said anything about this, I simply stated that an uneven distribution is the default since almost nothing is perfectly distributed

Since IQ is defined with the average of humanity at 100, which it definitely is not updated to, then there has to be severe difference in large groups beforehand enough to make SD a bad measure. This is not known beforehand.

>there is nothing unique or exceptional about IQ in this feat; almost any cognitive task can demonstrate the same.
It's the very best single predictor of g, and if you don't like it there are more comprehensive tests like WAIS-IV if you feel you need it.
WAIS-IV is more difficult to use on a global scale since it requires from cultural background to get a representative score.