What if you were asked to describe images you saw in an inkblot or to invent a story for an ambiguous illustration--say, of a middle-aged man looking away from a woman who was grabbing his arm? To comply, you would draw on your own emotions, experiences, memories and imagination. You would, in short, project yourself into the images. Once you did that, many practicing psychologists would assert, trained evaluators could mine your musings to reach conclusions about your personality traits, unconscious needs and overall mental health.