Some things to consider while developing your interview questions:

1. Have opening “warm-up” questions.

2. Make your subject comfortable in the situation.

3. Sequence questions logically, from the general to the more probing.

4. Maker sure your interview questions connect to your ultimate research question.

5. Avoid offending interview subject.

6. Show that you know something about their situation. Ask them to corroborate or disagree with what you’ve researched.

7. Be very, very clear about who you are and what you are doing.

8. Ask questions that address the subjective experience of the individual, not question that could be answered through research or that could be answered in one word. Coax stories out of your subjects.

 

From Anton Borst (2014)