Final answer:
A structured interview is where a specific set of questions is asked with minimal variation between respondents, allowing for consistency and comparability in survey research.
Step-by-step explanation:
The type of interview that involves asking subjects a specific set of questions that vary as little as possible from one respondent to the next is known as a structured interview. In this method, the interviewer asks the same questions of every candidate, the questions are prepared in advance, and a standardized rating system is often employed for each response. This approach allows for consistency and comparability between interviews, making it a preferred method for conducting surveys and research in various fields. Comparatively, an unstructured interview allows for more spontaneous and free-flowing conversation, which can be beneficial for qualitative research or when in-depth responses are required.