The user interview is one of the most foundational methods in a designer's toolkit. It creates a direct, human connection between the design team and the people they are designing for. Unlike surveys or analytics, interviews capture nuance, emotion, and the unexpected details that reshape assumptions. When done well, a single conversation can surface an insight that redirects an entire project.
What It Is
A user interview is a structured or semi-structured one-on-one conversation between a researcher and a participant. The goal is to understand that person's experiences, motivations, mental models, and pain points in relation to a specific topic or product space. Semi-structured interviews use a prepared guide but allow the conversation to follow unexpected threads. This flexibility is what makes them so powerful: participants take you places you would never have thought to look.
How to Run It
Start by writing a discussion guide with five to ten open-ended questions. Recruit participants who represent your target user group, aiming for at least five to eight interviews before looking for patterns. During the session, begin with easy warm-up questions to build rapport before moving to the core topic. Ask 'why' and 'tell me more' generously. Record audio or video with the participant's consent. After each session, spend fifteen minutes writing quick observations while memory is fresh, then transcribe or code the full recording within twenty-four hours.
When to Use It
User interviews are most valuable at the start of a project when you need to understand the problem space, and again after a prototype exists to explore reactions in depth. Use them when you have open questions about motivations and behaviour rather than questions about frequency or scale. They pair well with surveys: the survey tells you what is happening broadly, the interview tells you why it is happening at all.
Tips for Success
Avoid leading questions. Instead of 'Do you find this confusing?' ask 'Walk me through what you would do next.' Silence is your friend: resist the urge to fill pauses, because participants often share the most valuable insights just after a moment of quiet. Recruit from the edges as well as the centre of your user base. Extreme users often surface problems that mainstream users have simply learned to tolerate without noticing.
