FDPMed uses active retrieval with feedback, adjusts spacing to the intended retention date, and prioritizes accuracy together with confidence. Exact cutoffs are a conservative FDPMed scheduling policy rather than a claim that one interval is universally optimal.

• Cepeda et al. (2008) — the effective gap changes with the desired retention interval.
• Roediger & Karpicke (2006) — retrieval improves delayed retention compared with restudy.
• Larsen et al. (2009) — repeated testing with feedback improved long-term retention in medical residents.
• Price et al. (2025) — confidence-aware spaced repetition improved learning and transfer in physicians.