“That within ten years most theories in psychology will take the form of computer programs, or of qualitative statements about the characteristics of computer programs.”

Herbert SimonResearcher

Professor at Carnegie Institute of Technology and RAND Corporation; co-creator of the Logic Theorist

Information-processing models did become an influential way of theorising in the cognitive revolution that Newell and Simon themselves led, culminating in Human Problem Solving (1972). But the great majority of psychological theories — in clinical, social, developmental and personality psychology — were never cast as computer programs within the ten-year window or since.