Confidence-based repetition: A user rates their confidence in each digital flashcard, e.g. on a scale of 1–5; a lower-confidence card is repeated more frequently until the user upgrades their confidence rating in it.
— ❐ Spaced Repetition — Wikipedia (also just quoting 💻 Brainscape)
- solves ~ practicing recognition on the computer is easy, but practicing recall is hard
- because we don't need to check whether something is correct, we let user do it