The author argues that no "hard" data exists on genetically based differences in intelligence among human groups. IQ measures the heritability of IQ, and statistical inaccuracies in reported studies are discussed and questioned. The current interest in biological determinism of intelligence is trivial; individuals can not be judged by group means.…

A study designed to examine biological, sociological, and early maturational correlates of intelligence collected data prospectively, from birth to 15 years of age, on a sample of 987 black children. Multiple indicators of eight independent and three dependent variables were tested in a structural equation model. Altogether, clear sex differences…

Much of our thinking about contemporary social problems reflects tacit presuppositions regarding the operation of heredity and environment in human behavior. These beliefs have important implications for practical decisions. Advances in genetics, psychology, anthropology, and other disciplines have contributed much to a clarification of the…