A relatively new instrument, the Defense Style Questionnaire (DSQ), represents an efficient method by which to quantify an individual's psychological defense style. We administered the DSQ to 66 women hospitalized for anorexia nervosa, bulimia nervosa, or concurrent anorexia and bulimia nervosa. Contrary to our expectations, there were no consistent patterns of identifiable defense styles specific to these groups in qualitative, univariate, and multivariate analyses. The failure of the DSQ to demonstrate specificity across eating disorder subgroups suggests it is not informative in regard to the pathogenesis of these specific syndromes. In contrast, in a previous study, we found temperamental measures to be informative.