Interview types and classifications

Interview classification doesn’t need to become a maze. The most practical way to sort interview methods is by how structured the conversation is—unstructured, semi-structured, or structured—because most other “named” interview types end up fitting into one of these three buckets. That framing matters because it keeps researchers focused on what they actually need from participants, rather than getting stuck debating labels.

Other popular classifications—like participatory, narrative, cognitive, or factual/conceptual interviews—can look like separate systems, but they generally describe either (1) what kind of information is being elicited or (2) how the interviewer manages the interaction. A factual interview targets specific, verifiable details (for example, whether someone was at a particular location at a particular time), which naturally pushes toward highly structured questioning such as short answers or yes/no prompts. A conceptual interview does the opposite: it aims to uncover how participants define ideas and interpret social reality—what “happiness” means to them, for instance—so it tends to be less structured, though still guided by the topic.

Narrative interviews shift attention to the interaction style: participants are invited to provide long stories with minimal interruption, often starting with broad prompts like “Please tell me everything about your childhood.” The goal isn’t only the content of the account; it’s also how people construct their narratives—what they emphasize, how they move between topics, and how the story is presented. Cognitive interviews, rooted in psychology and used in memory-focused police work, rely on question techniques designed to trigger recall. Instead of asking for a straightforward timeline, interviewers may prompt participants with sensory cues—smells and sounds from a given day—or even ask them to reconstruct events in reverse order. In one described study, migrants who initially struggled to remember details from years earlier began recalling more once sensory prompts were introduced; one participant remembered the smell associated with McDonald’s and, from there, reconstructed a fuller story including shock at encountering a worker and hearing a Scottish accent.

Even interview types based on power and relationship dynamics—such as discursive interviews focused on interviewer–interviewee power relations, or participatory interviews where the researcher is physically present at the research site—still don’t escape the core structure-based categories. The practical takeaway is to avoid panic when multiple taxonomies appear. When planning a study, the deciding factors should be the research questions and the study’s aims: what information must be inferred, and what kind of participant engagement will make that information accessible.

In practice, researchers often end up combining approaches. After piloting, the described researcher adjusted from strict, guided questioning that made participants stressed and unable to focus, toward freer prompts that allowed participants to talk at length. The resulting method blended semi-structured interviewing with elements of cognitive interviewing (sensory recall prompts) and narrative interviewing (general prompts with time to elaborate). The key message is that researchers don’t need to lock themselves into a perfect label upfront; the classification becomes clearer as the study develops, especially once the methods are written up.