“Differences in the Intelligence of Children across 31 Provinces and Municipalities of China and Their Economic and Social Correlates”, 2016-09-01 (; similar):
IQs of children across 31 provinces of China are correlated with the percentage of Han in the population (r = 0.75).
And with the GDP per capita (r = 0.73)
And with years of education (r = 0.76)
This study reports the associations between the intelligence of children aged 8–10 years across 31 provinces and municipalities of the People’s Republic of China and their economic and social correlates. It was found that regional IQs were statistically-significantly correlated at the p < 0.001 statistical-significance level with the percentage of Han in the population (r = 0.75), GDP per capita (r = 0.73), and years of education (r = 0.76). Results of a multiple regression analysis showed that regional IQs were the only statistically-significant predictor of regional differences in the GDP per capita accounting for 56% of the variance.
[Keywords: intelligence, China, Chinese provinces and municipalities, per capita income, Han]