 Patients diagnosed with Binge Eating Disorder BED overeat food but, as opposed to patients with bulimia nervosa, they do not compensate for their increased food intake and therefore their body weight increases. It is hypothesized that the speed of eating has increased in BED and that body weight will decrease if the speed of eating is decreased. The speed of eating is measured using Mandometer, an eating disorder conditioning tool, class 2 device cleared by the FDA for the treatment of eating disorders. Mandometer is a scale connected to a computer, patients eat food from a plate on the scale and the computer stores the weight loss of the plate, thus recording the speed of eating. Patients decrease their speed of eating by following training curves on the computer screen while eating. The emergence of their own speed of eating on the screen makes this possible. Patients use Mandometer for lunch and dinner over one week at home to estimate their speed of eating and their food intake as the first step of clinical pratice. Mandometer is then programmed with how much and how quickly to eat and patients practice eating using Mandometer at home over the subsequent treatment. Data from 166 BED-patients using Mandometer at home and from a total of 354 patients who have been treated have been collected. 30 normal weight, healthy subjects will be recruited to test the hypothesis that their speed of eating is lower than that of the BED-patients. These control subjects will eat lunch and dinner using Mandometer at home over one week, but they will, obviously, not participate in treatment. 