Solve practice questions before checking the answer

Work through exam-style questions on material you just studied — and attempt every question before checking.

Why it works

Practice questions with real answers create an error-detection and correction loop: you commit to an answer, receive feedback, and update the model. The commitment step — having to decide — forces engagement with your actual current knowledge rather than a floating sense of familiarity. Errors made on practice tests are especially well retained because the discrepancy between your predicted answer and the correct one is informationally rich.

How to do it

1. After studying a topic, find or create 5–10 practice questions at the level you need to perform.
2. Complete all questions before checking any — grading mid-way destroys the commitment effect.
3. When grading, note not just what was wrong but specifically why your reasoning failed.
4. Re-test on wrong items in 24 hours without re-reading the full material first.

Evidence

Errors on practice tests are corrected and retained at high rates when feedback is provided, because the error-correction creates a distinctive encoding event. Kornell et al. (2009) showed that unsuccessful retrieval attempts followed by correct answer presentation produced better learning than simply reading the answer. (rct)

The benefit of error-correction is most reliable when feedback is provided promptly after the error; delayed or absent feedback can consolidate the wrong answer.

Sources

• Kornell, Hays & Bjork (2009), unsuccessful retrieval attempts enhance subsequent learning, Journal of Experimental Psychology: Learning, Memory, and Cognition

Common mistake

Abandoning a question and checking the answer the moment it feels hard — the productive struggle before and during the error is where much of the learning happens, not in reading the correct answer.