n the 2002 book IQ and the Wealth of Nations, and the 2006 book IQ and Global Inequality, Richard Lynn and Tatu Vanhanen created estimates of average IQs for 113 nations and estimated the IQs of 79 other nations based on neighboring nations and other manners. They also created an estimate of "quality of human conditions" for each nation based on gross national product per capita, adult literacy rate, the fraction of the population enrolled in secondary education, life expectancy, and rate of democratization. Lynn and Vanhanen found a substantial correlation between the national IQ scores they created and these various socioeconomic factors. They conclude that national IQ influences these measures of well-being and that national differences in IQ are heavily influenced by genetics, although they also allow for some environmental contributions. They regard nutrition as the most important environmental factor, and education a secondary factor.[6]

Though the collection has been praised as "landmark" by Rindermann,[7] the books and their argument have been roundly criticized on methodological and analytical grounds: for some countries, test samples were very small or unrepresentative, different tests were used by different researchers conducting the test surveys, measurements of intelligence stem from different years (although the authors tried to correct this), and missing data was estimated by using unweighted arithmetic means used for neighboring countries with similar people.[7][8][9][10][11]

In a 2010 paper, Lynn updated his estimates of national IQs from IQ and Global Inequality and presented new estimated national IQs for 25 countries, which had previously only been estimated from neighboring nations.[12] Lynn and Vanhanen updated their estimates again in the 2013 book Intelligence: A Unifying Construct for the Social Sciences.[13]

International student assessment studies[edit]
Regarding several methodology issues of IQ and the Wealth of Nations, Hunt and Wittmann compared contemporary educational data from the Program for International Student Assessment with national wealth. They concluded that Lynn and Vanhanen's empirical conclusion is correct, but they questioned the simple explanation that national intelligence causes national wealth.[14]

Cesterete them.

Karnal wrote on Apr 16^th, 2016 at 11:02pm:


Do you know your IQ do you come close to 80 ?

Karnal wrote on Apr 16^th, 2016 at 10:30pm:


Hypothetically if a racists was to discover cognitive differences between different races and they were peer reviewed would you accept the results regardless of how unpalatable they are?