Return to the Vividness of Visual Imagery Questionnaire 2 (VVIQ2) page
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						Vividness of Visual Imagery Questionnaire 2 (VVIQ2)
						Demographic Questionnaire and Opinion Survey
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Script Author of original Inquisit VVIQ script:  Adnan Niazi (Donders Institute for Brain, Cognition and Behaviour, 
Radboud University Nijmegen) 

last updated:  11-06-2019 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

The VVIQ2 script builds on the original Inquisit VVIQ.script.

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BACKGROUND INFO 	
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This script implements the VVIQ 2 by

Marks, D.F. (1995). New Directions for Imagery Research. Journal of Mental Imagery, 19, 153-167.

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OVERVIEW
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participants rate with eyes closed the vividness of
32 imagined scenes on a 5-point scale (a glider is used in this script).
(8 scenes with 4 questions each)
Each response receives 1 (lowest vividness) to 5 (highest vividness) points.

(Note: the VVIQ2 questionnaire reverses the scales compared to the VVIQ questionnaire)

Max combined score = 5*32 = 160 (high vividness)
Min combined score = 1*32 = 32 (low vividness)

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DURATION 
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the default set-up of the script takes appr. 6 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: 'vviq2*.iqdat'(a separate file for each participant)

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 (no image at all)- 5 (perfectly clear and vivid)								
									
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: 'vviq2_summary*.iqdat' (a separate file for each participant)

computer.platform:				the platform the script was run on (win/mac/ios/android)
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)
demographics:
textbox.age.response:					age response of participant
radiobuttons.gender.response:			gender response of participant
textbox.occupation.response:			occupation response of participant


expressions.vviq2_total: 				Range 32 (low ability to imagine) -160 (high ability to imagine)
Note: the higher the score, the higher the ability to imagine

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INSTRUCTIONS 
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The htm instruction pages are provided by Millisecond Software (build on the instructions by Niazi). 
They were written to closely resemble the original instructions for the VVIQ
(at: http://web.archive.org/web/20080615154210/http://www.staff.city.ac.uk/d.marks/vviq.htm)
while adapting them to the computerized set-up used in this script.

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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.