We all know how to ask questions, but if we asked questions in interviews the way we ask questions in typical interactions, we would fall short. In a conversational setting, we are perhaps striving to talk at least 50 per cent of the time, and mostly to talk about ourselves. But interviewing is not a social conversation. Falling back on your social defaults is going to get you into trouble!
Portigal, Steve. Interviewing Users: How to Uncover Compelling Insights. Rosenfeld Media.