How can an average genetic predisposition for giftedness reveal someone to be above gifted (3sd)?

In the world of behavioral genetics, we frequently encounter a fascinating paradox: individuals whose general intelligence predisposition tests point to “average” or “medium-high” results, but who, in practice, operate at a level of profound giftedness (above 3 standard deviations). How does biology explain this apparent “miscalculation”? The answer lies not in the brute force of […]