Robert J. Sternberg, IBM Professor of Psychology and Education, Yale University's Psychology Department has developed the triarchic theory of intelligence, which he discussed in this interview. A graduate of Yale and Stanford Universities, his research has dealt with theories of intelligence, individual differences in cognition, thinking and reasoning, problem solving, and multi, variate data analysis with latent variables and observable variables. He is a productive writer, having authored approximately 30 books, and authored or coauthored more than 300 articles and book chapters. His most recent book is Metaphors of the Mind (1990), published by Cambridge University Press.