Changes

Although social scientists have disputes about the accuracy of IQ scores in a given region, regions do vary in terms of their IQ scores.<ref name="CountryIQ">[https://iq-research.info/en/page/average-iq-by-country WORLD RANKING OF COUNTRIES BY THEIR AVERAGE]</ref><ref name="NatureIQ">[http://www.nature.com/hdy/journal/v92/n4/full/6800418a.html Book Review: IQ and the Wealth of Nations], ''Nature''</ref><ref name="AfricanIQ">[https://www.sciencedaily.com/releases/2010/01/100121155220.htm Controversial study of African IQ levels is 'deeply flawed'], Science Daily, January 21, 2010</ref>  

Although social scientists have disputes about the accuracy of IQ scores in a given region, regions do vary in terms of their IQ scores.<ref name="CountryIQ">[https://iq-research.info/en/page/average-iq-by-country WORLD RANKING OF COUNTRIES BY THEIR AVERAGE]</ref><ref name="NatureIQ">[http://www.nature.com/hdy/journal/v92/n4/full/6800418a.html Book Review: IQ and the Wealth of Nations], ''Nature''</ref><ref name="AfricanIQ">[https://www.sciencedaily.com/releases/2010/01/100121155220.htm Controversial study of African IQ levels is 'deeply flawed'], Science Daily, January 21, 2010</ref>  

in his paper, ''The Rise and Fall of the World's IQ'', Thomas Hally wrote:

Thomas Hally wrote:

{{cquote|In many areas phenotypic intelligence has been increasing (the Flynn Effect) while genotypic intelligence is decreasing due to the negative association between intelligence and that which is known as ³dysgenic fertility´. Gains of as much as 7.5 IQ points in phenotypic intelligence are much greater than the 0.43 IQ points per generation in the world-wide genotypic IQ that had been estimated for the period 1950-2000. The situation in the industrially developed world appears to follow the lead of the United States and a handful of other developed nations in so far as the phenotypic IQ has been increasing at a greater rate as a result of environmental improvements.

{{cquote|In many areas phenotypic intelligence has been increasing (the Flynn Effect) while genotypic intelligence is decreasing due to the negative association between intelligence and that which is known as ³dysgenic fertility´. Gains of as much as 7.5 IQ points in phenotypic intelligence are much greater than the 0.43 IQ points per generation in the world-wide genotypic IQ that had been estimated for the period 1950-2000. The situation in the industrially developed world appears to follow the lead of the United States and a handful of other developed nations in so far as the phenotypic IQ has been increasing at a greater rate as a result of environmental improvements.