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							*Problematic Internet Use Questionnaire (PIUQ)*
							*with 18 items()
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 12-18-2020
last updated: 12-18-2020 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 12-18-2020 Millisecond Software

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BACKGROUND INFO 	
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This script implements the Problematic Internet Use Questionnaire (PIUQ) by Demetrovics et al (2008).
The PIUQ was tested with a sample that ranged in age from 12-69 (mean: ~23).

Reference

Demetrovics, Z., Szeredi, B., & Rózsa, S. (2008). The three-factor model of Internet addiction: 
The development of the Problematic Internet Use Questionnaire. Behavior Research Methods, 40, 563-574.

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OVERVIEW
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18 questions, 5-point Likert Scale (never - always)

Subscales
Obsession: Questions 1, 4, 7, 10, 13, 16
Neglect: Questions 2, 5, 8, 11, 14, 17
Control disorder: Questions 3, 6, 9, 12, 15, 18
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DURATION 
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the default set-up of the script takes appr. 1.5 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: 'piuq.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: 1 (never) - 5 (always)
									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)


(2) Summary data file: 'piuq_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)
									
/numberMissingItems:				the number of questions that have not been answered 
Note: by default settings, all questions are required to be answered. However, that setting can be changed.
If default setting is changed, the above variable can be used as a flag.

//Total and Subscale Scores: scored on scale: 1 (never) to 5 (always)
PIUQ_total:							the total score (range: 18-90); 
PIUQ_Obsession:						the score on subscale 'obsession' (range: 6-30) 
PIUQ_Neglect:						the score on subscale 'neglect' (range: 6-30)  
PIUQ_ControlDisorder:				the score on subscale 'controldisorder' (range: 6-30) 									
+ z-scores and percentiles if applicable
									
+ responses to individual items
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QUESTIONNAIRE SET-UP & SCORING
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18 questions, 5-point Likert Scale (never - always)

Subscales
Obsession: Questions 1, 4, 7, 10, 13, 16
Neglect: Questions 2, 5, 8, 11, 14, 17
Control Disorder: Questions 3, 6, 9, 12, 15, 18

Scoring:
Each question is scored on a scale 1 (never) to 5 (always)
A subscale score is computed for each of the 3 subscales based on the sum of the individual responses.
The Total PIUQ score is based on the sum of all responses.

Norms are calculated (if gender is provided) by default based on data (means and standard deviations)
provided by Demetrovics et al (2008, p.569, table 7).
Check out section Editable Parameters to turn off the demographic questions (and norm calculations).

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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: