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					Quick Inventory of Depressive Symptomatology (QIDS SR-16)

Script Author: Katja Borchert, Ph.D. ( for Millisecond Software, LLC
Date: 03-02-2018
last updated:  04-18-2018 by K.Borchert for Millisecond Software LLC

Script Copyright © 04-18-2018 Millisecond Software


This script implements a computerized version of the Quick Inventory of Depressive Symptomatology (QIDS SR-16) as described in:

Rush, A. J., Trivedi, M. H., Ibrahim, H. M., Carmody, T. J., Arnow, B., Klein, D. K., …
Keller, M. B. (2003). The 16-Item quick inventory of depressive symptomatology
(QIDS), clinician rating (QIDS-C), and self-report (QIDS-SR): a psychometric
evaluation in patients with chronic major depression. Biological Psychiatry, 54,

16 4-multiple choice questions regarding sleep, mood, appetite, concentration and psychomotor behavior

The default data stored in the data files are:

(1) Raw data file: 'QIDS_SR16.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: 'QIDS_SR16_summary.iqdat' (Inquisit Lab: one data file per 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)
/Total:							calcuated as: max score(q1, q2, q3, q4) + q5 + max score(q6, q7, q8, q9) + q10 +
								q11 + q12 + q13 + q14 + max score(q15, q16)
								Range: 0-27
								Suggested Interpretation:
								0-5: no depression
								6-10: mild depression
								11-15: moderate depression
								16-20: severe depression
								21-27: very severe depression

see section Editable Parameters

check below for (relatively) easily editable parameters, stimuli, instructions etc. 
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment.

The parameters you can change are:

/pageinstructions:			the instructions that appear at the top of each surveypage

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