Our memory can be thought of as a leaky bucket, in that as soon as we learn it, we begin to forget it. Hence, it is important to repeat memory consolidation, often through [[Active Recall]]. Luckily, the more we repeat, the longer the forgetting time. Spaced repetition flashcard applications include [[Anki]] and [[Supermemo]]. Where [[Piotr Woźniak]] pioneered research on being able to time when to perform repetitions, to minimise time spent for retaining the information. Such applications are heavily used by language learners and medical students, where there are large amounts of declarative knowledge that need to be memorised. At current time of writing (10/6/2025) there are 165k members on r/anki and 174k members on r/medicalschoolanki. Where I informally have seen online communities such as on tiktok, share informal advice on how to make effective use of such algorithms and even buy separate anki remotes. I had made a video explaining the SM2 spaced repetition algorithm which used to be the main driver of Anki, but now FSRS is preferred.  --- ### What type of knowledge? It seems to be prioritised by students for declarative knowledge, such as memorising definitions or translations. With others online noting how they use it for birthdays, names, and trivia. However, [[Piotr Woźniak]] seems to use it extensively with [[Incremental Reading]] and other kinds of information. This could be a belief that low level learning behaviours, can map to higher order behaviours; somewhat akin to [[B.F. Skinner]]'s notion that reinforcement can map onto higher-order behaviours. --- Nicky case made a really interesting [game/blog/comic/idk?](https://ncase.me/remember/), demonstrating spaced repetition! --- TODO: * Look into effectiveness with different types of knowledge. Do we prioritise flashcards and declarative memory, since they are the most obvious to obverse? * Create a note explaining the FSRS algorithm