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*Graded Chronic Pain Scale - Revised (GCPS-R)*
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 05-06-2020
last updated: 02-23-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC
Script Copyright © 02-23-2022 Millisecond Software
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BACKGROUND INFO
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This script implements the Graded Chronic Pain Scale-Revised (GCPS-R).
The GCPS-R uses a standard 3-month recall period for assessing chronic pain and high-impact chronic pain,
as well as a 1-week time frame for assessing current pain severity.
Reference
Von Korff, M.; DeBar, L.L.; Krebs, E.E,c; Kerns, R.D.; Deyo, R.A; Keefe, F.J.(2020).
Graded chronic pain scale revised: mild, bothersome, and high-impact chronic pain.
PAIN,161,651-661.
doi: 10.1097/j.pain.0000000000001758
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OVERVIEW
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This script runs 2 screening question regarding chronic pain during the last 3 months as well as
well as 4 questions regarding pain severity during the last week.
If the answer to the first question is 0 ("no pain during the last 3 months"), the remaining questions are
skipped.
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DURATION
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the default set-up of the script takes appr. 1 minute to complete
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DATA FILE INFORMATION
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The default data stored in the data files are:
(1) Raw data file: 'gradedchronicpainscale_revised.iqdat'
date, time: date and time script was run with the current group/subjectnumber
subject, group, session: with the current subject/groupnumber/session id
build: the Inquisit build
q*_response: response given (in assigned values)
Scale:
R = automatically 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)
(2) Summary data file: 'gradedchronicpainscale_revised_summary.iqdat' (Inquisit Lab: one data file per participant)
inquisit.version: Inquisit version run
computer.platform: the platform the script was run on (win/mac/ios/android)
startdate: date script was run
starttime: time script was started
subjectid: assigned subject id number
groupid: assigned group id number
sessionid: assigned session id number
elapsedtime: time it took to run script (in ms); measured from onset to offset of script
completed: 0 = script was not completed (prematurely aborted);
1 = script was completed (all conditions run)
grade: 0: chronic pain absent
1: mild chronic pain
2: bothersome chronic pain
3: high impact chronic pain
+ responses to the individual 6 questions
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QUESTIONNAIRE SET-UP & SCORING
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6 likert-type questions:
grade scoring follows the algorithm outline in vonKorff et al (2020):
q1 = if response is Never/Some days => grade 0
q2 = if response is Most Days/Every Day => grade3
(q3+q4+q5) >= 12 => grade 2 else grade 1
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INSTRUCTIONS
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EDITABLE CODE
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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 general instructions provided
