Note: Repost from the old blog.
From an article by Philippe Rushton, hereditarian, a revelation about yet another instance of skyrocketing IQ increases in the second generation born in the West after migrating from the less developed areas.
Previously, we noted that the children Jamaican immigrants to the UK (IQ = 71) have IQ’s of 85-86, typically within a single generation. That is a gain of 14.5 IQ points merely by being raised in the West. Hereditarians have offered many rationales for this. The usual is that the Jamaican immigrants were already very bright anyway (as we will see with Moroccans and Turks in Netherlands, this is not true).
Another is that Jamaicans in the UK are very heavily bred in with Whites to the point where they may be only 1/2 White. This is not true – UK Jamaicans are only 12% White (Jamaicans in Jamaica are 9% White).
The children of Indian and Pakistani immigrants to the UK (IQ = 81.5) have IQ’s ranging from 92 (Rushton) to 96 (a figure I prefer). Call it 94. This is a gain of 12.5 IQ points merely by being raised in the West. The counter-argument here once again is that this group is self-selected.
Taken together, the children of Jamaican and East Indian immigrants see rises of 13.5 IQ points merely by being raised in the West. It is true that beyond the initial jump, we are not seeing more rises.
However, a strong initial jump is perfectly consonant with a hyperinjection of massive intellectual stimulation, good health care, proper diet, etc. This is probably all related to a higher standard of living. Higher standards of living seem to be somehow translating into long-term rises in IQ. The mechanisms can be debated, and we have done so on this blog.
Education, a massively-stimulating environment (computers, cell phones, TV, movies), proper nutrition, good health care, and myriad other things have been suggested, but the mechanisms for the rises are still somewhat mysterious.
Now, via Rushton, we have yet more evidence of a Flynn Effect in immigrants to the West. First generation Moroccans and Turks in Netherlands had IQ’s of 81. This is low. The Moroccan norm IQ is 84 and the Turkish norm IQ is 90. So, contrary to the argument that only the very brightest immigrants are going to the West, it seems instead that the less bright immigrants are arriving instead.
The second generation has IQ’s of 89. 89 is around the Turkish average, but it is 5 points above the Moroccan average. At any rate, it shows a Flynn gain of 8 points simply by migrating to the West. Rushton tries to explain this away somehow, but he doesn’t do a good job of it.
The evidence for massive IQ gains in second generation immigrants to the West is now becoming overwhelming and it is going to be harder and harder for hereditarians to explain this stuff away.
Comparison of 1st and 2nd generation immigrants to the West and the resulting Flynn Effect gains, apparently solely by being born and raised in the West. The common factor behind rising IQ’s in the West may be related to rising standards of living.
1st 2nd Gain UK Jamaicans 71 85.5 14.5 UK East Indians 81.5 94 12.5 ND Moroccans/Turks 81 88 7 Average 78 89 11.5