Adjacent-domain transfer testing

Test understanding by applying the mechanism to a new domain — genuine understanding transfers; IOED does not.

Why it works

Narrative familiarity is domain-specific — it applies only to the surface form in which the information was encountered. Genuine mechanistic understanding, by contrast, supports analogical transfer: the same causal principle applies in a new domain. Applying a mechanism to a novel domain tests whether it is actually understood or merely recognized in its original surface form.

How to do it

1. After studying a mechanism (e.g., negative feedback loops), identify an adjacent domain where the same principle operates.
2. Explain how the mechanism applies in that domain without looking anything up.
3. Note where the analogy breaks down — the breakdown points reveal the limits of your mechanistic understanding.
4. If the mechanism does not transfer at all, you likely have narrative rather than mechanistic knowledge.

Evidence

Transfer is the criterion for genuine understanding in educational psychology. Mechanisms that are understood deeply transfer to structurally similar problems; surface-level familiarity does not. (mechanistic)

Transfer is notoriously difficult to achieve even with genuine understanding — surface dissimilarity between domains can block transfer even when the underlying mechanism is the same. Transfer failure does not always mean IOED.

Sources

• Gick & Holyoak (1980), "Analogical problem solving," Cognitive Psychology

Common mistake

Testing understanding only on problems that have the same surface features as the original learning material, which allows narrative recognition to produce correct answers without mechanistic transfer.