Locking up some young people in a prison, conditioning a child to develop fear of white animals, faking insanity to be admitted into a mental hospital, confronting two groups to each other in a place far from civilization, deliberately induce stuttering in children, sending letters to complete strangers or making schoolboys believe a dictatorship was going to be established in their country, are just some of the things done in the most amazing psychological experiments. Psychology, like any science, needs experimentation to advance. To better understand human nature, sometimes psychologists have designed experiments that put their participants in shocking, baffling or striking situations, sometimes even cruel. Some of the experiments we will see in this book were successful while others had near fatal consequences, but they certainly went down in history as some of the most amazing experiments in psychology.