depth interview

this interview are those interviews that are designed to discover underlying motives and desire and used in motivational research .

Depth interviews involve conducting one-on-one interviews with participants in order to gather detailed insights and understanding of their thoughts, feelings, and experiences on a specific topic. This method allows for a more in-depth exploration of individual perspectives compared to group interviews or surveys. Depth interviews often use open-ended questions to encourage participants to provide rich and detailed responses.

CORALIE MCCORMACK has written:

'STORYING STORIES : A NARRATIVE APPROACH TO IN-DEPTH INTERVIEW CONVERSATIONS'

It would probably be a good idea, especially if you are planning on conducting an "in-depth" interview. However, many (most?) interviews/interrogations are made without the benefit of having such preparedness.