Cumulative deficit is an hypothesis concerning the cause of lower mental test scores of groups considered environmentally deprived. It presupposes a progressive decrement in test scores, relative to population norms, as a function of age. Clarification of the theoretical issues and the methodological problems involved in establishing the…

Jensen (1985) caused us to reexamine earlier findings. After correcting perceptual efficiency and executive systems measures for unreliability, original conclusions remain tenable. Control processes are factors in understanding race-related differences in intelligence. We do not deny the association of "speediness" but argue for a multidimensional…

The intellectual development of black college students on a predominantly white campus was examined using the Reflective Judgment model of post-adolescent intellectual development. The model posits a seven-stage sequence of changes in assumptions about the sources of certainty of knowledge, and shows how these assumptions affect the ways adults…