Eppig, Fincher, and Thornhill (2011) conducted a study looking at different US states found that states with a higher prevalence of infectious diseases had lower average IQ. The effect remained after controlling for the effects of wealth and educational variation.
Eppig, Fincher, and Thornhill (2011) conducted a study looking at different US states found that states with a higher prevalence of infectious diseases had lower average IQ. The effect remained after controlling for the effects of wealth and educational variation.