Make sure THEY understand that your purposes are NOT to blow whistles, although the reports once produced will be public documents. Make sure they understand the project before you ask them for an interview. Your instructor must consult with your group regarding all interview questions. That consent must be in respose to some detailed description of the project, and how the information will be used. You must document your attempt to conduct each interview type before resorting to the next type of interview.
Refusal means something.
It is not necessarily a failure on your part. The consulting team will produce a composite perspective of the group's belief system organized into meaningful philosophical and moral categories. Ethical Profiling Consulting teams will locate the group with reference to major ethical traditions. A draft of each individual's overview must be approved by the instructor before it can be presented to the group, and progress can continue. The ethical profile will lay out with even more research quality, clarity, precision, completeness and plausability the reasons for locating the group within that ethical tradition.