US and British Blacks get a 9-14 point IQ boost somehow just from living in the West. In US Blacks, their skulls even got better. There may also have been some epigenetic changes as US Blacks now seem to have a phenotype or even genotype IQ of ~85. When US Blacks came here, they probably had 70 IQ’s. If US Blacks would have stayed in Africa, they would probably have 70 IQ’s. White admixture only explains 6 points of the difference in Black-White IQ’s in the US. The other nine points are completely unexplained.
IQ Scores Before and After Western Move
On arrival After West
US Blacks 70? 85*
British Blacks 72 86**
* Six points of the 15 point increase in US Blacks can be explained by White admixture, assuming US Blacks are 20% White.
** Note that four points of the 14 point Black increase may be due to White admixture, but this is uncertain as we do not know the White admixture of Jamaicans in Jamaica. We only know the White admixture of Jamaican Blacks in the UK, which is 13%.
