Kitty Genovese and the Bystander Effect

I've always been fascinated with human psychology. I have an A-Level in psychology and seriously considered studying it at university (before I went in a different direction).

But if you've ever studied psychology at any level, it's likely you are familiar with the Kitty Genovese story. And, even if you haven't studied psychology, you might be familiar with the principles of the bystander effect.