- Record the interviews and offer recordings to any interested stakeholders or team members afterward. 
- Set expectations and ground rules for observers. The interviewer should be the only person asking questions of the participant. In video chats, hide participants so that the participant feel less nervous.
- Limit the number of interview staff in the room to 3 people and keep them out of sight.

New York University

An observer can limit how willing your participant will be to share intimate details about their experiences. An interview is meant to be a friendly one-on-one conversation; as you add observers who can insert their own questions,  it can feel a lot more like an interrogation. The fewer observers, the more comfortable it is for the participant.

Allowing Observers to Influence the Interview

Fessenden, T. (2021, June 6). 5 Facilitation Mistakes to Avoid During User Interviews. Nielsen Norman Group. Retrieved September 19, 2021, from https://www.nngroup.com/articles/interview-facilitation-mistakes/. 

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