Eating Disorders Inventory – EDI

Mohammed looti

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 symptoms and associated psychological features. The scale is intended for use with Clinical and non-clinical 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	2,9,12,19,31,45,55,59,62	9
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	8,21,26,33,40,44,47,51,60	9
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.

Psychometric Properties

Internal Consistency: The scale has demonstrated good to excellent internal consistency with reported Cronbach’s alpha values of Cronbach's alpha values typically range 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.