Find a genuine novice to test your explanation on

Before the real audience, explain to someone who actually doesn’t know.

Why it works

Imagining a novice perspective is unreliable because the expert’s knowledge is always available to contaminate the simulation. Using a real novice provides uncontaminated signal: their confused expressions, pauses, and questions map the exact gaps your mental model of them does not contain. This is deliberate error-seeking rather than comfort-seeking.

How to do it

1. Identify someone outside your field who represents your target audience.
2. Deliver your explanation with the same framing you plan to use for the real audience.
3. Do not intervene when they look confused — note the moment and let them tell you where it broke.
4. Revise exactly where the novice lost you, not where you felt least confident.

Evidence

User-testing and iterative design research consistently show that expert designers and writers systematically underestimate how confusing their output is until real novices interact with it. The principle is well established in cognitive engineering and UX. (clinical)

Most evidence comes from design and software usability rather than pure teaching contexts; the principle transfers, but effect sizes in educational settings are less directly studied.

Common mistake

Testing your explanation on a colleague who already knows the topic — they will simulate confusion but cannot actually produce it, so you learn nothing about real gaps.