Waiting for the Blast

January 1975
National Review;1/17/1975, Vol. 27 Issue 1, p20
The article focuses on a study conducted by psychiatrist Joseph Horn, who concludes that a person's genes play the overwhelming role in determining his intelligence. He compared the intelligence quotient (IQ) level of adopted children with the IQs of their adoptive parents and their biological mothers. It was found that the IQ scores of adopted children are much more often closely similar to their biological mothers than to the scores of their adoptive parents. Horn said that his studies clearly show that individual differences in intelligence among individuals in Western cultures are primarily determined by genetics.


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