Originally published in 1974 and taking the revolution in psycholinguistics and cognitive psychology as a point of departure, this book summarizes the lessons learned from past attempts to construct a psychology of the higher mental processes. Even more importantly, it crystallizes specific directives and research proposals that show where cognitive psychology ought to go in the future. The relationship of learning theory, linguistics, and perception to the broad field of cognition and the nature of mind and knowledge are examined in detail. Today it can be read in its historical context.