Eating Disorders Inventory – EDI
A self-report questionnaire designed to assess psychological and behavioral traits common in anorexia nervosa and bulimia.
Scale Development & Technical Details
Scale Overview
The Eating Disorders Inventory – EDI was developed by David M. Garner, Marion P. Olmsted, Janet Polivy (1983). It is designed to measure Eating disorder symptomatology and associated psychological traits. The scale is intended for use with Adolescents and adults.
Scale Structure
This instrument consists of 64 items organized into 8 factors/subscales: Drive for Thinness, Bulimia, Body Dissatisfaction, Ineffectiveness, Perfectionism, Interpersonal Distrust, Interoceptive Awareness, Maturity Fears.
| Factor / Subscale | Items | N |
|---|---|---|
| Drive for Thinness | 1,7,11,16,25,32,49,64 | 8 |
| Bulimia | 4,5,28,38,46,53,61 | 7 |
| Body Dissatisfaction | 2,9,12,19,31,45,47,55,59,62 | 10 |
| Ineffectiveness | 10,18,20,24,27,37,41,42,50,56 | 10 |
| Perfectionism | 13,29,36,43,52,63 | 6 |
| Interpersonal Distrust | 15,17,23,30,34,54,57 | 7 |
| Interoceptive Awareness | 8,21,26,33,40,44,51,60 | 8 |
| Maturity Fears | 3,6,14,22,35,39,48,58 | 8 |
Response Format
Respondents rate each item using a custom response format.
Response anchors: 1 = Always, 2 = Usually, 3 = Often, 4 = Sometimes, 5 = Rarely, 6 = Never.
The scale includes 19 reverse-scored items to reduce acquiescence bias.
Scoring
Items are scored by subscale, with each subscale sum representing a distinct dimension.
Total scores range from 0 to 192. Interpretation guidelines:
- Refer to subscale norms for clinical interpretation: 0 – 192
Psychometric Properties
Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Cronbach's alpha ranges from 0.80 to 0.90 for subscales.
Administration
The scale is self-administered and typically takes approximately 15 minutes to complete. It can be administered individually or in group settings. No special training is required for administration.