What is an In-Depth Interview (IDI)?

An In-Depth Interview (IDI) is a qualitative research method that involves conducting one-on-one interviews to gain deep insights into the motivations, thoughts, and mental models of participants. This technique allows researchers to explore complex topics and obtain detailed information that may not be accessible through traditional survey methods.

When to use In-Depth Interviews?

IDIs are particularly useful when researchers aim to understand the underlying reasons behind a participant's behavior, preferences, or decisions. They are ideal for exploratory research phases, when detailed qualitative data is needed to inform product development, design choices, or marketing strategies.

When not to use In-Depth Interviews?

In-Depth Interviews may not be suitable when the research requires quantitative data or when the sample size is large. They are time-consuming and resource-intensive, making them less effective for studies needing broad statistical analysis or when quick feedback is necessary.

What is the anatomy of an In-Depth Interview?

The anatomy of an IDI typically includes several key components: the recruitment of participants, the development of a semi-structured interview guide, the actual interview process which allows for probing and follow-up questions, and finally, the analysis of the data collected to identify common themes and insights.