The study of the human mind is fascinating. Understanding why we behave in the way we do could be the key to unleashing the full potential of the human race. So it is inevitable, perhaps, that researchers push at the boundaries of acceptability when devising psychological experiments.
Sometimes though, they go too far, and their eagerness to understand comes at the expense of other people’s safety and well-being. At best, the following psychological experiments left their participants hurt and upset (and sometimes traumatized). At worst, they cost lives.