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Testing Chinese and American Kids
Every three years the OECD tests fifteen year-olds around the world in reasoning and self-expression. China, aspiring to join the OECD club of developed nations, entered seven regions with a total population of 250 million–Beijing, Shanghai, and Jiangsu, Zhejiang, Hong Kong, Macao and Taiwan–and the results from the most recent tests were released this week.... Read More
Well, apart from the Gulf states - thanks in large part to coming from such a low base that even subcontinental coolies are an improvement over the natives. Otherwise, the cognitive impact of immigration - at least as proxied by the differences in performance on the PISA tests between the national average, which includes immigrant... Read More
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PISA test documents at a German school (source: Theo Müller). PISA and IQ tests are informing us about differences in intellectual capacity by country. Meanwhile, genetic studies are informing us about genomic differences by country. Davide Piffer has been tapping into these two pools of data to explore the links between genes and intellectual capacity.... Read More
A few months ago I posted a table and map of Russian IQ's as derived from regional PISA performance. Those figures are based on Jarkko Hautamäki’s slideshow comparing regional PISA performance in Finland and Russia. That material is a bit inadequate because, as had been my custom up that point, I was only making IQ... Read More
The question of Indian IQ is a big puzzle. Far trickier than China's IQ which I think I've basically figured out (101-102 today; 106-108 genetic ceiling). The PISA-adjusted IQ of India - as extrapolated from the states of Tamil Nadu and Himachal Pradesh, which are relatively rich and are reputed to have good school systems... Read More
As human capital is so important for prosperity, it behoves us to know China's in detail to assess whether it will continue converging on developed countries. Until recently the best data we had were disparate IQ tests (on the basis of which Richard Lynn's latest estimate is an IQ of 105.8 in his 2012 book... Read More
There are several ways to influence national mean IQ levels. One is to improve nutrition and education, but vitally important though they are, they suffer from diminishing returns as populations bump up against their genetic ceilings. Another is to promote eugenic policies, or at least policies to mitigate the dysgenic trends that are typical of... Read More
Now that I'm done with the Necessary Caveats, it's time we had a look at why exactly HBD/IQ theories are both valid, and relevant to the real world. As I see it, their main import (as interpreted by me) can be distilled into a few logically consecutive, falsifiable statements: IQ tests are a valid, culturally... Read More
Just in case you thought the correlation between human capital and economic development was an artifice of the post-socialist world, here is a similar graph (R2=0.4273) for all the world's countries that have participated in the Math and Science portions of the PISA or TIMMS (8th grade) international standardized student assessments. The methodology is the... Read More