Anorexia nervosa patients are portrayed as competent and accomplished and yet they feel ineffective and diffident. The assessment of this aspect of their self-esteem presents methodological problems. The Interests and Abilities Questionnaire was designed to measure interests and perceived abilities in typical adolescent activities. The disparity between interests and perceived abilities--perceived-competence deficit (PCD)--was hypothesized to be characteristic of anorexics. Three groups of females, aged 14 to 24, were studied: 13 anorexic inpatients, 13 psychiatric inpatients without an eating disorder but of similar severity of illness, and 48 nonclinical subjects. Similar to the nonclinical controls, anorexics were interested in a variety of activities; similar to control patients, anorexics rated their abilities lower than nonclinical subjects. In PCD, anorexics scored significantly higher than both control groups; this difference was not related to level of depression.