This volume includes eight essays. In his "Foreword," Carl Senna examines the revival of the hereditarian position by Arthur Jensen. "Race and Intelligence" contains a critique of Richard C. Lewontin of Jensen's argument, revealing what appear to be deeply embedded assumptions derived from a particular world view. David Z. Robinson, in "If You're So Rich, You Must Be Smart: Some Thoughts on Status, Race, and I. Q.," examines the interaction of race, class, heredity and I. Q. Christopher Jencks, in "What Color is I. Q.? Intelligence and Race," focusses on Jensen's argument that individuals with low I. Q.'s typically differ genetically from those with high I. Q.'s. In "Speed and Direction," C. Senna asserts that the distinction between speed and power is dubious. Jane R. Mercer and Wayne Curtis Brown examine the question, "Racial Differences in I. Q.: Fact or Artifact?" In "Science or Superstition? (A Physical Scientist Looks at the I. Q. Controversy)," David Layzer scrutinizes the logical, methodological, and psychological underpinnings of the doctrine of innate mental capacity. In "Can Slum Children Learn--," Stephen Strickland reports on "the Milwaukee Study," which demonstrated that I. Q. scores can be significantly raised by intensive educational stimulation. (Author/JM)