Answer:
A special kind of individual interview in which researchers ask lengthy, free-flowing kinds of questions to probe for underlying ideas and feelings is called: depth interview.
Explanation:
In-depth interview
A kind of qualitative research including an unregulated individual interview with an individual respondent, attended by an extremely skilled interviewer. The goal of in-depth interviews is to know the underlying impulses, beliefs, perspectives, and opinions of respondents on a particular topic.