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\J been virtually synonymous with debate on whether genetic factors influence I&. Although there stdl may be some who would reduce the debate to questioning the specifics of individual studies, it appears that the issue has been resolved for the vast majority of psychologists. Snyderman and Rothman (1990) recently surveyed psychologists’ beliefs about intelligence and reported that over 90% of those responding agreed that I& was, at least in part, heritable. This modern consensus, a clear reversal of opinion from the 1950s and 1960s, is a direct result of the substantial body of research compiled by behavioral geneticists over the past 50 yearsa corpus that unequivocally implicates genetic factors in the development of I&.