Contributions in the first section of this volume are: "Learning to Identify Toy Block Structures" by Patrick Winston; "Beyond the Yellow-Volkswagen Detector and the Grandmother Cell: A General Strategy for the Exploration of Operations in Human Pattern Recognition" by Naomi Weisstein; "Visual Recognition in a Theory of Information Processing" by Richard M. Shiffrin and Wilson S. Geisler; "The Structure of Memory and the Process of Solving Problems" by James G. Greeno; "Memory, Knowledge, and the Answering of Questions" by Donald A. Norman; and "Cognition: Natural and Artificial" by Michael I. Posner. Section two contains the following articles: "Limiting the Flood of Stimulation: A Protective Deficit in Chronic Schizophrenia" by William E. Broen, Jr.; "Cognition in Delay of Gratification" by Walter Mischel; "Adolescent Conflict in the Development of Moral Principles" by Elliott Turiel; "Integrating the Information in Referential Messages" by Melvin Manis and Louis van Rooijen; "Selection Strategies in Concept Attainment" by Patrick R. Laughlin; and "Some Forms of Cognition: A Critical Analysis of Several Papers" by L. E. Bourne, Jr. References are appended to each contribution; the volume also contains two informal discussions held with the authors of sections one and two. (MF)