Also of interest in this article:
For the last decade of his life, Dr. Fagan was unexpectedly drawn into the “genes versus environment” debate over intelligence after he found that babies from widely different cultural backgrounds performed equally well on his test. That, he argued, undercut the argument for a biological basis for the stark “achievement gap” between white and black children, or rich and poor.
In a chapter in “The Cambridge Handbook of Intelligence”, co-edited by Dr. Kaufman and published in 2011, Dr. Fagan wrote, “A parsimonious explanation for the findings is that later differences in I.Q. between different racial-ethnic groups may spring from differences in cultural exposure to information past infancy, not from group differences in the basic ability to process information.”
