Interactive Reading

The Forgetting Curve

In the late nineteenth century, the German psychologist Hermann Ebbinghaus conducted a series of experiments on his own memory. He memorized lists of meaningless syllables and tested how many he could recall after different periods of ____(1). His results showed that forgetting happens very quickly at first and then gradually slows down. （缺一句话） Ebbinghaus also discovered that reviewing material at increasing intervals greatly improved ____(2). This principle, now known as spaced repetition, is used in many modern language-learning apps. Rather than cramming information in a single session, learners who spread their study over days or weeks tend to remember it far ____(3).