Originally published in 1985, Problem Solving and Intelligence was the result of the author's efforts to understand the nature of human intelligence and the differences in the cognitive functioning of individuals which we observe again and again.

The book contains two types of material. First it presents an overview of major contributions to the conceptualization and investigation of problem solving and intelligence, which was derived from the extensive, largely non-cumulative literature at the time. Second it reports a comprehensive, empirical study of the manifestation of intelligence in problem solving.

The subject matter was at the interface of three traditional areas of psychological inquiry: namely, the study of cognitive processes, individual differences, and the characteristics of the stimulus. What was innovative is that intellectual performance is investigated in relation to the simultaneous operation of variables from these dimensions.

The book was intended, primarily, as a contribution to the understanding and investigation of the nature of intelligent behavior, as well as an introduction to intelligence and problem solving. Today it can be read and enjoyed in its historical context.