> in general are not robust Sure, but they are robust enough to be relevant to everyday life. > circularly defined g is circularly defined, which is the natu

> in general are not robust Sure, but they are robust enough to be relevant to everyday life. > circularly defined g is circularly defined, which is the nature of how a latent factor is defined. But g also does correlate with school and work performance (around r = .5), so it IS related to everyday life. Though you can only make extreme decisions based on single tests. E.g. you can say they are "likely not gifted" when they score low or "likely not an imbecile" when they score high.