Originally published in 1974, this volume presents up-to-date original research and theory in the field of cognition. The contributors survey the most intriguing problems of the area, including the construction of memory, retrieval from memory, concept formation, and problem solving. Also considered in the light of current cognitive theory are the fundamental questions of how language is formed and how learning takes place. The volume often views past theory and data from the perspective of new theoretical insights and provides challenging alternatives to the interpretation of previous experimentation.