What is Spaced Repetition? - Guide
Spaced repetition is a learning technique that schedules review sessions at gradually increasing intervals. Material is reviewed just before it would be forgotten, which strengthens memory with minimal study time.
Understanding Spaced Repetition
Spaced repetition is based on the forgetting curve, a concept introduced by psychologist Hermann Ebbinghaus in the 1880s. He found that memory decays exponentially after learning, but each review resets and flattens the curve. By timing reviews strategically, learners can maintain knowledge with far less total study time than massed practice (cramming).
Modern spaced repetition systems (SRS) use algorithms to calculate optimal review intervals for each piece of information. When you answer a flashcard correctly, the interval before the next review increases. When you answer incorrectly, the interval resets to a shorter period. This ensures you spend time only on material that needs reinforcement.
Spaced repetition is backed by extensive research in cognitive psychology and is considered one of the most efficient study methods available. It is particularly effective for subjects requiring memorization: language vocabulary, medical terminology, legal concepts, and historical facts. Tools like Notella incorporate spaced repetition into their flashcard features to help users retain information from their notes.
Key Facts
- 1Based on the forgetting curve discovered by Hermann Ebbinghaus
- 2Reviews are scheduled just before the memory would fade
- 3Algorithms adjust intervals based on individual performance
- 4More efficient than cramming for long-term retention
- 5Widely used in language learning, medicine, and exam preparation
Related Terms
Flashcard Learning
Flashcard learning is a study technique that uses cards with a question or prompt on one side and the answer on the other. It leverages active recall and spaced repetition to strengthen memory retention.
Active Recall
Active recall is a study method where learners actively retrieve information from memory rather than passively reviewing it. Testing yourself on material is more effective for retention than re-reading or highlighting.
Study Techniques
Study techniques are specific methods and strategies used to learn, understand, and retain information. Evidence-based techniques like active recall and spaced repetition consistently outperform passive methods like re-reading.
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