How many users do you need for a usability test?
Nielsen's five-user rule explained: where it holds, and when your sample needs to be bigger.
Moderated vs unmoderated usability testing: which one do you need?
What each method actually gets you, and how to choose without guessing.
What can AI actually do in user research?
A plain-language line between where AI genuinely helps and where it still needs a human.
