Protocol
Compare before-feedback and after-feedback work
Improvement is easier to see when the evidence sits side by side.
When it fits
- When progress is described from memory rather than from comparable performance samples.
When to avoid it
- Comparisons need reasonably similar difficulty. A harder second task can show better skill even with a lower raw score.
Why it matters
Keep a small pair of comparable attempts around important feedback. Compare the specific behavior the feedback targeted, not the overall impression. If the new sample is better, test whether the change survives a fresh case; if not, inspect whether the feedback was unclear, misapplied or irrelevant.
Steps
- Same target criterion is visible in both attempts.
- The feedback point is identifiable.
- The changed behavior can be observed.
- A fresh case is used before claiming general improvement.
An example
Two interview answers are compared on whether the decision, evidence and result are explicit; visual polish is ignored because it was not the training target.
Check your result
The learner can point to the changed behavior and explain whether it transferred beyond the revised artifact.
Keep this limit in mind
- Comparisons need reasonably similar difficulty. A harder second task can show better skill even with a lower raw score.
Evidence and sources
A meta-analysis of 435 feedback studies found a medium average effect on learning (d = 0.48) with substantial heterogeneity, and the information content of feedback materially moderated impact.
More feedback is not automatically better, and effects differ by outcome and feedback form.
The Power of Feedback Revisited: A Meta-Analysis of Educational Feedback Research · Abstract