An in-depth interview (IDI) is a qualitative research method that involves a one-on-one conversation between a trained interviewer and a carefully selected participant. Unlike structured surveys or group discussions, in-depth interviews create a private, confidential space where participants can share their experiences, opinions, and emotions in rich detail—without the influence of group dynamics or the constraints of pre-set answer options.

At Mansfield, we use in-depth interviews to explore complex, sensitive, or nuanced topics that require deep understanding. Whether you need to investigate customer decision-making processes, understand employee experiences, or explore stakeholder perspectives, IDIs provide the depth and personalisation that other methods cannot match.