DYSGENESIS AND IQ - WHAT EVIDENCE IS RELEVANT

W. M. Williams and S. J. Ceci (1997, this issue) argue against the pre sence of dysgenic trends for IQ in the United States on the basis of a bsence of change in the differences between various groups. It is note d here that such differences say little about dysgenesis: This is illu strated by an example of the numbers of children born to Black and Whi te women at different educational levels. Some overall effects, mechan isms, and implications of dysgenesis for IQ are discussed.