Double your Brain power (Libro en inglés)

According to experiments by Allan Gevins, director of EEG systems laboratory, it takes as much energy to scribble mindlessly as to paint a masterpiece. Gevins used an eight channel EEG to record the brain waves of artists engaged in serious drawing and people who were just doodling. He thought artists who were concentrating would generate more mental energy than did the doodlers. To his surprise, Gevins found no difference in the amount of brain power either group used. He concluded that it takes no more mental energy to create a masterpiece than most of us use on a typical day. The moral is clear: Since you have to generate just as much energy to goof off as to paint a masterpiece, you might as well paint a masterpiece. from Double Your Brain Power