Eating disorder inventory – 3 (EDI-3)

The EDI-3 was administered to screen for ED characteristics and behaviors. This is a 91-item self-reported questionnaire, used by clinicians to identify individuals with disordered eating patterns [26]. A Likert scale is composed of 6 ratings (always, usually, often, sometimes, rarely, never). The EDI-3 consists of 3 ED specific scales and 9 general psychological scales - that are highly relevant to ED patients. It yields 2 main composites, 1 ED specific (Eating Disorder Risk Composite-EDRC) and the overall Psychological Maladjustment composite (GPMC) which consist of 4 general integrative psychological composite constructs (Ineffectiveness-IC, Interpersonal Problems-IPC, Affective Problems-APC, Overcontrol-OC). Examples of statements consisted of: “I think that my stomach is to big”; “I feel ineffective as a person”; and “I trust others”. The EDI-3 is a validated tool and has a high test-re-test reliability of .98 [26]. Two main composites consist of the EDRC (reliability range from .90 to .97 with a median of .95 [26]; current study was .83) and the GPMC (reliability range .93 to .97 and median of .93 [26]; and current study was .824). This instrument is copyrighted by Psychological Assessment Resources, Inc. Permission for use is granted with purchase of inventory. The computer-based scoring program for the EDI-3 was used to assess the outcomes of each individual participants. The software generates individualized score reports with raw scores, T scores, percentiles, and qualitative classifications (Low Clinical, Typical Clinical, Elevated Clinical) for all EDI-3 scales [26]. Clinical ranges are based on percentile ranges for the U.S. Adult Combined Clinical sample (i.e., Low Clinical = 1st to 24th percentile; Typical Clinical = 25th to 66th percentile, Elevated Clinical = 37th to 99th percentile [26]. To account for response style (e.g., irregular, deviant, or anomalous response patterns, etc.; to be considered “at risk” for an ED on the EDI-3, participants had at least two or more composite scores at typical clinical or elevated clinical.