Eating Disorder Inventory (EDI-3): The EDI-3 Introductory Kit provides a comprehensive measure of the presence and intensity of psychological traits or symptom clusters that are clinically relevant in the broad assessment of individuals with eating disorders. The purpose of using this test is to provide a standardized clinical evaluation of symptomatology associated with eating disorders in ages 13-53 years. It can be administered to an individual or to a group and typically takes about 20 minutes to complete. The results of this test are useful for providers in case conceptualization and treatment planning and are also a valuable research tool. The EDI-3 is an updated revision of the EDI-2 and contains enhanced scales and composites for measuring constructs more consistent with modern theories. The EDI-3 consists of 91 items that are organized into 12 primary scales, consisting of 3 eating disorder specific scales and 9 general psychological scales that are relevant but not specific to eating disorders. The results provide six composites that aid in assessing other areas of potential clinical concern and focus. Source.