The fact that cognitive psychology has become largely concerned with a handful of laboratory tasks has brought expressions of concern and suggestions about how to place the field on a more solid footing. The view expressed here, however, is that the classic cognitive paradigms have become fascinating puzzles on which some of the best minds in the field have labored. An examination of the development of research in these areas yields many examples of the scientific method at its most sophisticated, as well as impressive examples of how theories and data can interact. Covering the whole...