The internal structure of the Eating Disorder Inventory.

The Eating Disorder Inventory (EDI; Garner, Olmsted, & Polivy, 1983) is used as a screening instrument for identifying potential anorexia nervosa and bulimia nervosa. It comprises eight subscales: Bulimia, Drive for Thinness, Body Dissatisfaction, Maturity Fears, Introceptive Awareness, Perfectionism, Interpersonal Distrust, and Ineffectiveness. We examined the internal structure of the EDI using a principle components factor analysis, for a sample of women with no known eating disorder. The results of the factor analyses showed differences between the extracted factors and Garner et al.'s subscales. Seven factors were extracted, accounting for 60.8% of the variance. The first factor accounted for 33.5% of the variance. The analysis indicated that items factored along positive-negative and factual-emotional lines. We conclude that at present there is not enough evidence to support the efficacy of the subscale structure with women who are not known to have eating disorders.