Hermann Ebbinghaus studied how we forget information over time by using nonsense syllables to avoid prior associations
He discovered that forgetting occurs quickly: up to 70% of what we learn is forgotten within a day, and up to 90% is lost within a week.
Most of what we learn is quickly forgotten—making consistent, spaced repetition essential for long-term retention.
See the full study here :
Ebbinghaus, H. (1885). “Über das Gedächtnis. Untersuchungen zur experimentellen Psychologie.”
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