Unconscious body image misperception
In the interest of optimizing treatment for people with anorexia nervosa, Anouk Keizer and a team of psychologists at Utrecht University in The Netherlands are working to understand how patients perceive themselves in relation to the physical world. They describe, for example, that people with anorexia seem to vary from the general population in how they perceive certain sensations of touch on their own skin. But, they say, there's not a lot known about "unconscious, action-related, aspects" of perceived body size.
So, to look at this, they asked 39 people (19 diagnosed with anorexia nervosa and 20 without) to walk around a room that included doorways of various sizes. The participants were distracted, asked to do a memory exercise while walking, not knowing that the actual experiment was to look at how they approached the openings.
For the rest of the story: http://www.theatlantic.com/health/archive/2013/06/anorexia-and-the-too-fat-to-fit-through-the-door-experiment/276790/