Uriah

Loads of things that could go wrong when testing a polygenic score using one population as the discovery & training sample on another population. Effect sizes, effect directions, interactions of SNPs can vary across populations;

Ashkenazi Jews are mostly European by ancestry, not that distant genetically.

What do you mean by mostly European? They are almost full EEF, have 0% ANE. In this case Turks and Iranians would be mostly European too.

Mostly Italian, plus some French and Eastern European.

This seems unlikely to me, their position on the pca would be different.

Their position on the pca is right next to South Italians.

This does reinforce Saloni’s point about eg the Reich North-South height paper overestimating selection, because with Wisconsin we’re comparing mostly Med Ashkenazim to northern Europeans (Italians only a few percent, Greeks trivial)

The point being what, that the paper mistakes a general intellectual advantage in Middle Easterners for a specifically Ashkenazi one? That might work, if like with N. Europeans and height, there clear indicators that Middle Easterners were smarter than Euros. There aren't though.