THE BRAINPING FIELD GUIDE
Spaced repetition: give an idea a reason to return.
Make room between reviews. Use an example schedule to get started, then adjust it to what you can remember.
Spaced repetition means reviewing material across separate sessions, with gaps between them. You return to a question, try to answer from memory, and use the result to help decide when to come back.
Why space your reviews?
Reviewing the same answer several times in a row can make the current session feel smooth. A review after a gap gives you another opportunity to find out what you can retrieve. Spacing also lets you distribute the work instead of putting every review into one sitting.
Cepeda and colleagues' review of distributed practice found that effective spacing depends in part on how long the material needs to be retained. Longer retention intervals tended to call for longer gaps between study sessions. Read the review and its findings.
An example spaced repetition schedule
Here is a starting schedule for a small set of questions. It is an example to adapt, not a universal prescription or the schedule used by every flashcard app.
| When | What to do |
|---|---|
| Day 0 | Understand the idea, write a question, and try an initial answer. |
| Day 1 | Answer without notes, then check and correct. |
| Day 3 | Try again. Rewrite any unclear prompt. |
| Day 7 | Recall the answer and give an example in your own words. |
| Day 14 | Check what remains and choose the next interval. |
Say you learn an idea on Monday. Your first return could be Tuesday, then Thursday, then the following Monday. Put those dates on a calendar or let a scheduling app handle them. If your deadline is sooner, plan reviews within the time available rather than following this example literally.
Adjust the gaps to your answers
- You forgot the answer: check the source, attempt it again after a short break, and shorten the next gap.
- You remembered with effort: keep practicing the idea before making a large jump in the interval.
- You recalled it clearly: consider a longer gap and test it in a different example.
- The question is confusing: fix the wording before blaming the schedule.
For example, if you repeatedly confuse two definitions, a card asking how they differ may help you diagnose the mix-up. Scheduling alone cannot make an ambiguous question precise or supply an explanation you never learned.
Spaced repetition and active recall do different jobs
Spacing describes when you study. Active recall describes what you do during a review: attempt an answer before looking. You can combine them using paper questions, a notebook, or an app. Our Anki beginner's guide covers an app that schedules flashcard reviews.
What if you miss a day?
Resume with a manageable group of questions. Check what you can still answer, correct what you missed, and plan the next return. A missed date is information about your routine. If the queue is consistently too large, reduce new material until the reviews fit the time you have.