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units grew stronger by 0.08/month for accuracy-based performance measures and 0.06/month for speed-based and mixed performance measures. With lack of use, half of initial skill acquisition performance gains were lost after approximately 6.5 months for accuracy, 13 months for speed, and 11 months for mixed performance. Task type, task complexity, intermittent performance opportunities, and task instructions were identified as possible moderators of skill decay rates. Findings provide researchers with estimates of how much skill decay can be expected if skills are not frequently used and, therefore, when refresher training should be considered. Important methodological considerations for skill retention research were also identified, including the need to isolate retention performance from relearning effects and the need to account for speed-accuracy trade-off functions when interpreting changes in performance over time. (PsycInfo Database Record (c) 2025 APA, all rights reserved).
Tatel et al. (Sun,) studied this question.