As noted in other chapters in this volume (e.g., Chapters 1, 3, 11, and 13), the extant empirical research on skill decay is limited. It is therefore not surprising to find a near absence of literature devoted to enhancing skill retention on cognitively complex tasks during periods of nonuse. One possible method of enhancing the retention of trained skills during a period of nonuse is repeating the initial training some time during the nonuse period (tantamount to shortening the nonuse interval). Although hands-on retraining may certainly enhance retention (Schendel and Hagman, 1982), employing such a program could be cost prohibitive. Research on alternative refresher training interventions that do not involve hands-on practice is limited and researchers and training professionals alike have little empirical guidance upon which to base the design of such refresher training programs.