Additional Study Information: A research study at the New York State Psychiatric Institute and Columbia University Medical Center is looking for healthy adults between the ages of 18 and 40 to participate in a study aiming to understand how outcomes of computer tasks motivate learning in adults with and without anorexia nervosa. Participants will be asked to answer questionnaires, complete computer tasks, look at and make decisions about pictures in an fMRI scanner, and eat lunch in our eating lab. An MRI uses a magnet to take pictures of the brain (there is no radiation in this study). Come into the lab 3 times over the course of a week and get up to $150 for your participation.