What Do Doodles in the Margins Reveal?

Just as Freud once made a great fuss about slips of the tongue - which are never accidental and reveal something about a person's inner state of mind - so too doodles and scribbles in the margins of paper are not accidental. Psychologists have for a long time studied the connection between unconsciously drawn lines and a person's inner experiences. I will try to summarise a few findings briefly.