Receive corrective feedback promptly after a test attempt

For error-based learning to work, feedback must follow the error — delay weakens the effect and risks embedding the wrong answer.

Why it works

The prediction error signal created by an error is strongest immediately after the error. Prompt feedback catches the brain while the error representation is still active and the "correction needed" signal is salient. Delayed feedback allows the error to consolidate partially, requiring more effort to overwrite. For very confident errors specifically, the hypercorrection mechanism depends on the emotional salience of being corrected while the surprise is still present.

How to do it

1. Structure testing so that correct answers are immediately available after the attempt — create an answer key before you test yourself.
2. Do not allow more than a few minutes to pass between testing and checking.
3. For more complex skills, have a coach, peer, or model answer available for comparison immediately after each attempt.
4. If delayed feedback is unavoidable, restudy the question before receiving feedback to reactivate the error trace.

Evidence

The optimal feedback timing question is nuanced: immediate feedback is best for factual errors; slightly delayed feedback (within the same session) may help for complex reasoning by allowing partial processing. For simple fact correction, the evidence favors prompt feedback. (observational)

The "immediate vs delayed" literature is not fully settled; the main principle — don’t let errors sit uncorrected for days — is robust, but the within-session timing is less critical.

Sources

• Hays, Kornell & Bjork (2010), The costs and benefits of providing feedback during learning, Psychonomic Bulletin & Review

Common mistake

Testing yourself extensively and then delaying the answer check until a future session, allowing the errors to partially consolidate before correction arrives.