Naive hypothesis: Given the Flynn effect, and that college students are younger than the general population, could that explain the difference? That Coscott’s conditional “If US citizens between 18 and 24 are representative of the entire population in terms of IQ” is false?
IQ tests are at least supposed to be normed for the age group in question, in order to eliminate such effects, but I don’t know how it’s done for the estimates in question.
Naive hypothesis: Given the Flynn effect, and that college students are younger than the general population, could that explain the difference? That Coscott’s conditional “If US citizens between 18 and 24 are representative of the entire population in terms of IQ” is false?
IQ tests are at least supposed to be normed for the age group in question, in order to eliminate such effects, but I don’t know how it’s done for the estimates in question.
I think that is likely.