Return to the Immune Status Questionnaire (ISQ) page
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								*Immune Status Questionnaire (ISQ)*
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 10-06-2021
last updated: 10-06-2021 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 10-06-2021 Millisecond Software

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BACKGROUND INFO 	
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This script implements the Immune Status Questionnaire (ISQ)

Reference
Wilod Versprille LJF, van de Loo AJAE, Mackus M, et al. Development and validation of the  Immune Status Questionnaire (ISQ). 
Int J Environ Res Public Health.2019;16(23):4743. 
Licensee MDPI, Basel, Switzerland. Creative Commons Attribution (CC BY) license 
(http://creativecommons.org/licenses/by/4.0/).
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OVERVIEW
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7 5-point Likert type questions regarding experienced symptoms over the past 12 months 

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DURATION 
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the default set-up of the script takes appr. 1 minutes 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: 'ISQ.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: 'ISQ_summary.iqdat' (Inquisit Lab: one data file per participant)

computer.platform:					the platform the script was run on (win/mac/ios/android)
inquisit.build:						the version/build of Inquisit
script.startdate:					date script was run
script.starttime:					time script was started
script.subjectid:					assigned subject id number
script.groupid:						assigned group id number
script.sessionid:					assigned session id number
script.elapsedtime:					time it took to run script (in ms); measured from onset to offset of script
script.completed:					0 = script was not completed (prematurely aborted); 
									1 = script was completed (all conditions run)
									
expressions.ISQ_rawScore:			0 - 28								
									
Interpretation: 0 = very poor, 10 excellent perceived immune status. 
Cut off for reduced immune functioning: ISQ < 6.	

expressions.ISQ_finalScore:			Range 0-10								

Wilod Versprille et al. (2019) recommended also assessing current immune and health status in conjunction with the ISQ. 
Question A assess percieved immune functioning and Question B assess perceived general health rated on 
a scale from 0 = very poor, 10 = excellent.
Question C assess perceived reduced immune fitness at this moment (response options: yes or no). Question D asks 
participants whether they have a chornic disease (response options: yes or no). If participants answer yes to this 
question they are asked to specify the chronic disease. 
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QUESTIONNAIRE SET-UP & SCORING
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Each of the 7 questions is scored on a scale from 0 (never) to 4 (almost always).
The raw score (0-28) is then converted to a final score (0-10) according to the following guidelines:
	expressions.ISQ_rawScore >= 15 => Final Score = 0;
	expressions.ISQ_rawScore = 14 => Final Score = 1;
	expressions.ISQ_rawScore = 13 => Final Score = 2
	expressions.ISQ_rawScore = 11 OR 12 => Final Score = 3
	expressions.ISQ_rawScore = 10 => Final Score = 4
	expressions.ISQ_rawScore = 8 OR 9) => Final Score = 5
	expressions.ISQ_rawScore = 7 => Final Score = 6
	expressions.ISQ_rawScore = 6 => Final Score = 7
	expressions.ISQ_rawScore = 5 => Final Score = 8
	expressions.ISQ_rawScore = 3 OR 4 => Final Score = 9
	anything under 3 => Final Score = 10

Interpretation: 0 = very poor, 10 excellent perceived immune status
Cut off for reduced immune functioning: ISQ < 6.
								
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INSTRUCTIONS 
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provided by Millisecond Software - can be edited under section Editable Parameters

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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 instructions that appear at the top of each surveypage

/quitinstructions:			the instructions to quit the questionnaire
								Note: the quitcommand can be changed under DEFAULTS