The Forgetting Curve: Why You Forget Books (And How to Fix It) | Chapterly Blog
The Forgetting Curve: Why You Forget Books (And How to Fix It) Quick Answer: The forgetting curve, discovered by Hermann Ebbinghaus in 1885, describes how memory decays without review: about 42% of new information is lost within 20 minutes, 70% within 24 hours, and 90% within a week. The curve is steepest immediately after learning. The fix is not reading more carefully the first time — it is strategic review. Each well-timed review flattens the curve and extends how long the memory survives, which is the foundation of spaced repetition for readers. For the exact day-by-day review schedule the curve implies, see how to use Ebbinghaus's review schedule. The moment you close a book, forgetting begins. This isn't a personal failure—it's biology. In 1885, German psychologist Hermann Ebbinghaus conducted groundbreaking experiments on memory that revealed something uncomfortable: without any review, we forget roughly 70% of new information within 24 hours and up to 90% within a week. He called this pattern the forgetting curve, and it explains why you can finish a brilliant book on Monday and struggle to recall its main ideas by Friday. What Is the Forgetting Curve? The forgetting curve is a mathematical model showing how information...