там критика, что IQ - плохой признак, дальше смотри g-factor
Other psychometricians have argued that, whether or not there is such a thing as a general intelligence factor, performance on tests relies crucially on knowledge acquired through prior exposure to the types of tasks that such tests contain. This means that comparisons of test scores between persons with widely different life experiences and cognitive habits do not reveal their relative innate potentials.
Ткни в место где написано "у белых лучше всех результаты в тесте, которому стоит верить"