NoaLingua Glossary
Spaced repetition (SRS)
Spaced repetition is reviewing material at increasing intervals, timed to arrive shortly before you would have forgotten it.
The effect it exploits is the spacing effect: information reviewed at widening intervals is retained far longer than the same total study time spent in one block. A card you get right moves further away; one you get wrong comes back sooner.
The two common scheduling approaches differ in what they ask of you. SM-2 and its descendants ask you to grade how hard each recall felt, and use that to adjust future intervals. Fixed-ladder systems only need to know whether you were right, and move up or down a predetermined sequence.
Where this shows up in NoaLingua
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