What is crucial for fully understanding an interview subject during questioning?

A well-defined purpose is crucial for fully understanding an interview subject during questioning because it guides the direction and focus of the conversation. Having a clear objective allows the interviewer to ask relevant questions that lead to meaningful responses, ensuring that the information obtained is aligned with the goals of the interview. This clarity helps both the interviewer and the subject stay on track, making it easier to gather accurate and comprehensive information.

In contrast, strong personal opinions can cloud the interviewer's judgment and lead to bias, making it more difficult to obtain objective responses from the subject. A legal presence might be necessary in some contexts, but it does not inherently enhance understanding of the subject. An intimidating demeanor can create fear or resistance in the interviewee, which could result in less openness and honesty during the questioning process. Thus, a well-defined purpose stands out as the key element in achieving effective communication and understanding in an interview.