And one of the first-year students I interviewed wanted reassurance that no names would be traceable from the answers. I was so surprised, because they think nothing of telling you about themselves and their opinions in seminar groups. Then, one of the people that I work with got a bit funny. As the questions were quite personal and one minute he said he'd do it, then the next day he wouldn't, and in the end he did do it. It's hard not to get angry in that situation but I tried to keep focused on the overall picture in order to stay calm. The most bizarre case was a telephone interview I did with a teacher at a university in France. He answered all my questions in great detail, but then when I asked how much access he had to dangerous substances he wouldn't tell me exactly what his work involved. It was a real eye-opener.