The most striking study of human non-verbal language have produced an animal with: a man who rarely inclined to share the shelter - at least intentionally: the rat. Students at the seminar but experimental psychology was given five rats, T-shaped maze and seemingly simple task . A labyrinth of hand painted white, the other - gray. The task of the rat was unpretentious - learn how to come to the gray sleeves and get it as a reward meal. The problem of students - each rat on a daily basis to give ten attempts to learn that in the gray sleeve give to eat, and fair to record the progress learning. But in this experiment, guinea were not rat, and the students themselves. Students are told that through a careful cross-breeding varieties can be grown rats with a particular talent for finding food in the maze, as well as those who are absolutely clueless in this regard. Half of the students said that their rat - polls Vasco da Gama on orientation in the maze, and the other - that of the rats grew spatial cretins. In fact, no selective breeding no advance is not made, and all experimental rodents were exactly the same - to everyone except, perhaps, their own mothers. The essence of the experiment - to compare the results obtained with two different groups of people, and to assess whether their initial expectations for achievement wards impact.