A qualitative interview is a more personal form of research compared to questionnaires. The interviewer can probe or ask follow-up research questions of the interview participant. In some cases, subjects may start to interview the interviewer. This fosters deep discussion of the interview topic.

How many interviewers are needed for qualitative research?

There is no rule as such. However, if your qualitative method is designed to meet rigour and trustworthiness, thick, rich data is important. To achieve these principles you would need at least 12 interviews, ensuring your participants are the holders of knowledge in the area you intend to investigate.

What are the types of interview in qualitative research?

There are three types of interviews which are used to gather data in qualitative research such as structured interviews, semi-structured interviews, and unstructured interviews.