DISCUSSION.

The article presents an elaboration of the papers of Herbert A. Simon on "Computer Simulation of Human Thinking and Problem Solving" and "An Information Processing Theory of Intellectual Development." The papers explore whether the inclusion in a computer simulation of the initial variations in state leads to uses of materials at various degrees of cognitive development. Simon suggests that the building of an information-processing system which mimics child behavior at a specific stage of development provides a "theory of the child" at that stage.