Skill and knowledge retention is a major issue and concern in learning and skill acquisition, especially when trained or acquired skills (or knowledge) are needed after long periods of nonuse. The goal of this book is to summarize and advance the thinking of critical issues related to skill retention and decay in the context of individual and team training on complex tasks. This volume will be of interest to researchers and practitioners in the fields of industrial and organizational psychology, human factors, organizational behavior, and human resources management.