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A. INTRODUCTION AND BACKGROUNDl,2 This report reviews and interprets research on the nature and magnitude of the effects of those factors which influence how well knowledge and skills (K&S) are retained over relatively long periods of nonuse. Our interest lies in the kinds of knowledge domains and skills that military personnel must master to function effectively on their jobs. The practical concern impelling this study is that K&S degradation or loss (which we will refer to as "decay") can and does occur, often and severely enough, to jeopardize military preparedness. There are occasions in...

Originally published in 1987, this volume made an early and important contribution to the reemphasis and reexamination of the conative and affective aspects of human performance, in coordination with cognitive psychology, in the study of aptitude, learning, and instruction.

Due largely to developments made in artificial intelligence and cognitive psychology during the past two decades, expertise has become an important subject for scholarly investigations. The Nature of Expertise displays the variety of domains and human activities to which the study of expertise has been applied, and reflects growing attention on learning and the acquisition of expertise. Applying approaches influenced by such disciplines as cognitive psychology, artificial intelligence, and cognitive science, the contributors discuss those conditions that enhance and those that limit...

This text has been fully updated to reflect the many developments and advances - particularly in software - made in the field over the last ten years. It provides a text for upper-level graduate courses in survival analysis, biostatistics and time-to-ever analysis.