Expert-explanation comparison

After explaining a concept yourself, compare your explanation to an expert’s and locate the differences.

Why it works

An expert explanation differs from a novice explanation not primarily in vocabulary but in the number of causal steps made explicit and the precision of mechanism at each step. Comparing your explanation to an expert version exposes the specific mechanistic steps you skipped or misrepresented — which are exactly the IOED gaps. The comparison is more informative than re-reading the expert explanation without attempting your own first.

How to do it

1. Produce your own mechanistic explanation first (recorded or written).
2. Find a high-quality expert explanation of the same mechanism.
3. Mark every point where the expert included a mechanistic step you omitted or described differently.
4. Rewrite your explanation incorporating only the first gap you identified before re-comparing.

Evidence

Generating before studying — "generate first, correct second" — consistently produces better retention than studying first, because the comparison highlights the gap between generated and correct content, making the correct version more memorable. (rct)

Effects are largest when the student makes a genuine attempt before seeing the expert version; passive comparison without prior generation is substantially less effective.

Sources

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

Common mistake

Reading the expert explanation before attempting your own, which makes the expert’s version feel obvious and familiar without revealing which parts you would have generated versus missed.