ganonm said "The fact that intelligence is approximately normally distributed is an indicator that there are many individual effects at play." Intelligence tes

ganonm said "The fact that intelligence is approximately normally distributed is an indicator that there are many individual effects at play." Intelligence test scores are normally distributed by construction: the weighting of questions is adjusted to ensure normality on a sample population. That test scores are normally distributed in samples other than the normative one tells us nothing other than that the test designers succeeded. Contrast this with height, the measure of which is not defined in terms of a population distribution.