This would need to be coded from the transcripts of the completed interviews, and I am not aware of any work that has done so.

I feel semi structured interviews might work out during this pandemic situation. But the Best way to get qualitative result is to manage a personal interview who are really excellent in their domain of interest. This is my suggestion. But you have to wait for this pandemic situation to reduce to nil.

Thank you David Morgan.

I hadn't been able to find any either but I was ever hopeful.

I find it strange just how little is known about what actually happens in qualitative interviews. Even something as simple as counting predetermined and follow-up questions. Or checking how closely the question protcol is adhered to – or not. There seems to be very little transparency about actual interview *process* (rather than planned) which means it is difficult to learn from good/poor practice.

James Lawley I share your frustration that there is so little research on qualitative methods and their application.