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									EATING DISORDER INVENTORY (EDI)
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 05-15-2012
last updated: 04-18-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 04-18-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements the Eating Disorder Inventory (EDI) as described in:

Garner, D.M., Olmstead, M.P., & Poliviy, J. (1983). Development and Validation of a Multidimensional
Eating Disorder Inventory for Anorexia Nervosa and Bulimia. Int'l Journal of Eating Disorder,
2, 15-34.


											  *Task*
The EDI contains the following 8 subscales/subtests (64 questions total):
1. Drive for Thinness (7 questions)
2. Bulimia (10 questions)
3. Body Dissatisfaction (7 questions)
4. Ineffectiveness (9 questions)
5. Perfectionism (10 questions)
6. Interpersonal Distrust (8 questions)
7. Interoceptive Awareness (6 questions)
8. Maturity Fears (7 questions)


DATA FILE INFORMATION: 
The default data stored in the data files are:

(1) Raw data file: 'EDI.iqdat'

date, time, group, subject:		date and time script was run with the current group/subjectnumber 
build:							the Inquisit build 

q*_response:					response given (in assigned values)								
q*_latency:						how much time (in ms) the participant spent on the surveypage with this particular question
									(the last time this particular surveypage was visited)

(2) Summary data file: 'EDI_summary*.iqdat' (a separate file for each participant)

script.startdate:				date script was run
script.starttime:				time script was started
script.subjectid:				subject id number
script.groupid:					group id number
script.elapsedtime:				time it took to run script (in ms)
computer.platform:				the platform the script was run on
/completed:						0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
/Totalscore:					the total score across subscales
/Subtest1-
/Subtest8:						the individual scores for the 8 subtests

								Note: The scoring of responses is done as described by Garner et al (1983): the most "anorexic" response
								scores a 3, the one below it scores a 2, the next a 1 and the rest a 0.

+ information regarding missed items (this is only relevant if responses to the questions are
not required; by default all responses are required).



EXPERIMENTAL SET-UP
The EDI contains the following 8 subscales/subtests (64 questions total):
1. Drive for Thinness (7 questions)
2. Bulimia (10 questions)
3. Body Dissatisfaction (7 questions)
4. Ineffectiveness (9 questions)
5. Perfectionism (10 questions)
6. Interpersonal Distrust (8 questions)
7. Interoceptive Awareness (6 questions)
8. Maturity Fears (7 questions)	

The script runs the survey and saves the raw data in the file EDI.dat.
Summary data (such as totalscore, scores on subscales etc) is saved in the data file EDI_summarydata.dat.

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