In thinking aloud test, I asked test participants to use the actual system while continuously thinking out loud — that is, simply verbalizing their thoughts as they move through the user interface. “Simply” ought to be in quotes, because it’s not that simple for most people to keep up a running monologue.
So, sometimes, I have to prompt users to keep them talking. In this way, I heard their misconceptions, which usually turn into actionable redesign recommendations. Even better, I learned why users guess wrong about some parts of the UI and why they find others easy to use.