This article reviews Raymond B. Cattell's important contributions to intelligence testing and the theory of intelligence. His theory of fluid and crystallized intelligences and other high-order factors of cognitive ability has offered the most well-founded and reasonable approach to an acceptable theory. (Author/BS)

This book, a critique of "The Bell Curve" by R. Herrnstein and C. Murray, explores what "inequality" in society means, how it arises, and how it can be measured or dealt with quantitatively. It also considers how societal and other variables work to increase or decrease inequality. The book argues that "The Bell…

It is argued that the statements and accusations made by Stephen Jay Gould about the use of factor analysis are incorrect and unjustified and that tests properly designed for the purpose can adequately measure a "general" or "g" factor of intelligence, particularly in view of the developments in testing since "The…

R. Herrnstein and C. Murray, in "The Bell Curve," stated six propositions concerning a "g" factor of intelligence. These propositions are found to be reasonably well supported in the scientific literature. These conclusions can be reached whether or not one accepts Herrnstein and Murray's claims about the social significance of…