Quick Inventory of Depressive Symptomatology - QIDS SR-16

Technical Manual

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond

Created: January 02, 2018

Last Modified: January 03, 2023 by K. Borchert (katjab@millisecond.com), Millisecond

Script Copyright © Millisecond Software, LLC

Background

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, 573-583.

Duration

1 minute

Overview

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

Instructions

see section Editable Parameters

Summary Data

File Name: qids_sr1616_summary.iqdat' (Inquisit Lab: one data file per participant)

Data Fields

NameDescription
inquisit.version Inquisit version number
computer.platform Device platform: win | mac |ios | android
startDate Date the session was run
startTime Time the session was run
subjectId Participant ID
groupId Group number
sessionId Session number
elapsedTime Session duration in ms
completed 0 = Test was not completed
1 = Test was completed
total Calculated 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
+ individual responses

Raw Data

File Name: qids_sr16.iqdat

Data Fields

NameDescription
date Date the session was run
time Time the session was run
subject, group, session With the current subject/groupnumber/session id
build Inquisit version number
q*_response Response given (in assigned values: 0-3) no reversed scored questions
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)

Parameters

The procedure can be adjusted by setting the following parameters.

NameDescriptionDefault
pageInstructions The instructions that appear at the top of each surveyPage