The testing effect: learning by recalling

In short: If you actively retrieve knowledge from memory, you usually retain it much better than someone who simply rereads the same material. Learning research calls this finding the testing effect or retrieval practice.

In more detail: Remembering is not just a check, it is a learning process in itself: every successful recall strengthens the memory trace. The effect is one of the best-supported findings in the psychology of learning, backed among others by studies from Henry Roediger and Jeffrey Karpicke.

In detail

• Why it works: When recalling, the brain has to find its own way to the information, and this very search consolidates it.
• The rereading illusion: Reading something several times creates a feeling of familiarity that is easily mistaken for real mastery.
• Simple methods: Close the book and write down what you still remember; flashcards; practice questions; past exam papers.
• Difficulty is part of it: Recalling feels harder than reading. That effort is not a sign of failure but part of the learning effect.
• Get feedback: After recalling, check the answer and correct mistakes so that nothing wrong sticks.
• Combine with spacing: Retrieval works best when it is repeated over days and weeks (vergessenskurve-und-wiederholen).
• No marks needed: It is not about being graded; a short, pressure-free self-test is perfectly enough.
• Benefit for exams: People who regularly practise recalling knowledge are often calmer in exams because the situation feels more familiar (pruefungsstress-bewaeltigen, gedaechtnis-und-arbeitsgedaechtnis).