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Here we go again in the IQ debate: claim and counterclaim; much heat, little light ("Professor under fire for racist views", É«ºÐÖ±²¥S , May 17).

Those interested in this debate should read the findings of the American Psychological Association Task Force on Intelligence (1996), which made plain what is known and unknown about the causes and consequences of general intelligence: .

Philip J. Corr
Senior lecturer in psychology
Goldsmiths College
University of London