IQ is largely genetic, even if some people claim otherwise. The evidence for this is now overwhelming: even when different ethnic groups grow up in very similar conditions in the same country, the PISA (which correlates r=0.9 with IQ) scores measured vary greatly. For example, among second-generation children in Germany, there are significant differences in PISA scores. Polish children achieve similar or even better scores than German children. Turkish children, on the other hand, remain at the same poor level that their parents (the first generation of immigrants) achieved in the tests.
Twin studies and studies of adopted children also leave no doubt that there is a very strong genetic component that determines IQ.
Even Wikipedia assumes that heritability can be as high as 80%.
Twin studies and studies of adopted children also leave no doubt that there is a very strong genetic component that determines IQ. Even Wikipedia assumes that heritability can be as high as 80%.
Links https://en.wikipedia.org/wiki/Heritability_of_IQ https://www.welt.de/wirtschaft/article174706968/OECD-Studie-...