The first is about how you ask the questions to the interviewee. I've found that it is far more effective to ask people questions that are not simple yes or no questions, but lead them to try and explain and articulate what they feel on a subject. This means that you get longer and more interesting responses to your questions. A good example of this would be asking "How would you describe working an a smaller kitchen, as opposed to a larger one?" rather than "Is it harder working in a small kitchen or a larger kitchen?".
I have also found that it is essential to remind the interviewee to try and preface the answer to questions, with the question itself. This is because the viewer will never actually hear me ask the question so it makes more sense the have them lead into it, for example: "I would say working in a smaller kitchen is always tough because..." instead of "it's pretty tough beacause...".
Another technique I've found is to have people introduce themselves at the beginning, and then repeat the introduction again at the end of interview. This is because people tend to relax much more by the end of it and the takes are always much better at the end. If someone is especially nervous I normally get them to repeat the first few questions at the end as well. Putting the more important or complex questions nearer the end is also useful as the are warmed up and thinking more deeply about the subject, and tend to give better responses.
Below is my questionnaire that I will use in the interviews, with colour coded parts next to eat question so I can check off who I still need an answer from. I have also added in suggested b-roll accompaniment as well as what I am hoping for in the answers, so I can make sure everything can fit together well.
