Friday, August 04, 2017

Another look at ancestry and IQ

It's been a few years since I looked at verbal IQ data listed by ethnicity. It's important to look at recent data since so many immigrant groups have such small samples sizes, estimates are not very reliable. Using GSS data, here is the ranking of scores to a 10-point vocabulary quiz--a quick measure of verbal IQ. I omitted people not born in the US since the quiz is biased against non-native speakers:

Vocabulary Ranking by Ancestry

Austria   7.27
Russia    7.12 
Lithuania   7.08
Romania   6.95
Denmark   6.85 
England/Wales   6.84
Hungary    6.78
Scotland   6.75
Yugoslavia   6.73
Sweden   6.71
China   6.70
Norway   6.68 
Switzerland   6.65
Arab   6.61
Finland   6.58 
Greece   6.53
Czech   6.56
Ireland   6.46 
Poland   6.46
Japan   6.47
Italy   6.42
France   6.34
French Canadian   6.30
Germany   6.29
Belgium   6.28
West Indies   6.19
Portugal   6.18
Netherlands   5.99
Philippines   5.84
Spain   5.83
India   5.53
American Indian   5.31
Africa   5.16
Mexico   5.00
Puerto Rico 4.99

The pattern hasn't changed much since the last time I looked. What jumps out at me: 1) Mex-Ams and Puerto Ricans are still at the bottom, even lowers than blacks; 2) recent data indicates that American Muslims might assimilate better than European Muslims--the data here indicates that US Arabs are pretty smart; 3) Asian Indians (n = 40) still have a low average despite their reputation for intelligence; 4) it looks like southern Europeans don't do as well as northern Europeans (but Romania and Yugoslavia are high); and 5) central and Eastern Europeans might get a boost toward the top of the list by the large numbers of Jews (with a mean of 7.56) among their ranks.

And if you're thinking, this is just all environment, you're wrong: According to this meta-analysis, vocabulary is 62% genetic among children, and it is certainly higher than that among adults.

Oh, and if you think the differences are no biggy, again you're wrong: The gap between the top and the bottom is huge: well over 1 standard deviation. 

1 comment:

Gorch Fock said...

Depends on what you mean by "assimilate". From their phenotypic features alone, they would be classed as unassimilable. Add to that their foreign culture (Islam) and high collectivism/nepotism, I hardly see how they fit into a society that was once dominantly Anglo-saxon and therefore Nordic (and Christian). Saudis also have the highest occurrence of the genotype MAOA-2R: 15.6%, while Europeans score around 0.1% to 0.5%. Hardly compatible. (Association study between the dopamine-related candidate gene polymorphisms and ADHD among Saudi Arabia population via PCR technique)

The appearance of most Moslems (facial features, phenotype in general etc.), be they Turkish, Arabic or North African etc., are usually too foreign to fit into any European country. (As an example, less than 10% of Turks have light eyes.) You can spot Moslems easily in western European countries from afar. (I live in western Germany.)

I'm not even an American, though I think that Wilmot Robertson's take on assimilation is a lot more informed than just using IQ data, verbal scores etc. Robertson was pretty much aware of the ethnic differences that even separate Anglo-Saxons from southern Europeans. Therefore I remain skeptical, and hope that my racial cousins in the US return to at least pre-1965 demographics (as, ironically, suggested by Vox Day, who is half Mexican/Native American).