Drawing together research and theory in ethology and psychology, this book offers a clear and provocative account of the ways in which living organisms learn. Throughout, the authors' focus is on the importance of operational definition. In lively prose, describing experiments in enough depth to involve readers in the drama of experimental method, they recount the history of scientists' attempts to answer basic questions, and show how one study builds on another. Although they present the major traditional positions, they demand that readers examine actual evidence, recognize weaknesses, and...