Race, brain size, and intelligence: another reply to Cernovsky.
Five sets of observations require explanation. Firstly, within both black and white populations there is a small positive correlation between IQ and brain size whether or not there is control for body size. Secondly, racial differences in average brain size occur such that Mongoloids greater than Caucasoids greater than Negroids especially with control for body size. Thirdly, mammals with larger brains relative to their bodies perform better on learning tasks than mammals with smaller brains relative to their bodies. Fourthly, average racial differences on measures of cognitive performance parallel the differences in average brain size. Fifthly, average racial differences on numerous other traits parallel the differences in intelligence and brain size. It is incumbent on scientists to explain these facts.
Rushton
J P
JP
Department of Psychology, University of Western Ontario, London, Canada.
D001741:Black or African American / Q000523:psychology*; D001835:Body Weight / Q000502:physiology; D001921:Brain / Q000033:anatomy & histology*; D002508:Cephalometry; D006801:Humans; D007360:Intelligence / Q000502:physiology*; D009929:Organ Size / Q000502:physiology