Spaced practice
Spread study over time instead of cramming it into one session.
Key takeaways
- What it is: Spread study over time instead of cramming it into one session.
- Why it works: Letting some forgetting happen between study sessions makes the next retrieval more effortful, and that effort is exactly what strengthens the memory — re-learning something you have partly forgotten builds a more durable trace than restudying something still fresh. Massed practice feels efficient because everything stays fluent, but that fluency fades fast after you stop.
- Evidence: Backed by randomized trials / meta-analyses.
- Avoid: Cramming the night before because it boosts short-term performance, while sacrificing the durable retention that spacing would have produced.
Why it works
Letting some forgetting happen between study sessions makes the next retrieval more effortful, and that effort is exactly what strengthens the memory — re-learning something you have partly forgotten builds a more durable trace than restudying something still fresh. Massed practice feels efficient because everything stays fluent, but that fluency fades fast after you stop.
How to do it
- 1Break study into multiple shorter sessions separated by days rather than one long block.
- 2Deliberately revisit material after you have begun to forget it, not before.
- 3Lengthen the gaps between reviews as the material becomes more secure.
What the evidence says
RCT / meta-analysisThe spacing effect — distributed practice yielding stronger long-term retention than massed practice — is among the most robustly replicated results in learning research, confirmed across many studies and a large meta-analysis.
Honest caveat: The best gap depends on how long you need to retain the material — longer retention goals call for longer spacing — so there is no single optimal interval.
- — Cepeda et al. (2006), meta-analysis of distributed practice, Psychological Bulletin
Common mistake
Cramming the night before because it boosts short-term performance, while sacrificing the durable retention that spacing would have produced.
IX Coach schedules material to return at expanding intervals timed to when you are about to forget it, so spacing happens automatically instead of by willpower.
Practice this with IX Coach →