Assuming that this really is an experiment, they are being asked to possibly be subjected to negative results. Researchers get to walk away when subjects of an

Assuming that this really is an experiment, they are being asked to possibly be subjected to negative results. Researchers get to walk away when subjects of an experiment can carry the consequences of an experiment with them for the rest of their lives. It seems to me that it is a survival instinct to refuse new things you don't understand from untrusted sources. Damn right that I do. The fact that I have a Western education and many years of Western life experience may mean that the reasoning I come up with is quite a bit better than someone lacking that, but it doesn't over ride a desire to not radically disrupt my current lifestyle - for better or worse - on a blind bet.