A psychologist named John Bargh asked a few hundred people to make a so-called scrambled sentence test. On a sheet of paper they had to make a sentence out of words such as worry, old, silence, gray, forgetful. The participants thought the test would be about their ability to form sentences or their way of thinking. But what Doctor Burgh was interested in was the how his visitors left his office after the test and how they backed down the hall. He could prove that all those who had made the test, no matter how old they were, walked slower away as they came. Unconsciously the words they had read induced their brain to imagine being old. The whole thing also worked the other way round. Giving the participants words suggesting youth made them act younger than they actually were.