Playing by the same rules reduces the differences between humans, chimps and monkeys

You’ve been asked to compete against some of your friends in a game of skill, but you realize something is amiss. They’ve been given precise instructions and details about the game’s mechanics. You’ve been given a couple of pieces and left to figure things out on your own. On this uneven playing field, no one could fairly compare your performance with that of your friends. This seems obvious, but it’s a problem that plagues a lot of research into the behavior of humans and other animals. STORY HERE.