Summary: In the early stages of a UX-design project, recruit enough people to gain an in-depth understanding of users’ experiences and needs. The number of people needed for an interview study is often smaller than you think.
One common question I get when teaching User Interviews, a full-day course at our UX Conference, is how many people do I need to interview? Unfortunately, there isn’t a golden number. In this article, I’ll highlight some factors that will help you decide.