___________________________________________________________________________________________________________________ Vividness of Visual Imagery Questionnaire (VVIQ) ___________________________________________________________________________________________________________________ Script Author: Adnan Niazi (Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen) last updated: 03-02-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Millisecond Software thanks Dr.Niazi for sharing his script! ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements the VVIQ by Marks, D.F. (1973). Visual imagery differences in the recall of pictures. British Journal of Psychology, 64(1), 17–24. A paper version of this VVIQ is available on David Marks webpage: http://web.archive.org/web/20080615154210/http://www.staff.city.ac.uk/d.marks/vviq.htm ___________________________________________________________________________________________________________________ OVERVIEW ___________________________________________________________________________________________________________________ participant rates once with eyes open/once with eyes closed the vividness of 16 imagined scenes on a 5-point scale (a glider is used in this script). Each response receives 1 (highest vividness) to 5 (lowest vividness) points. Max combined score = 5*32 = 160 (low vividness) Min combined score = 1*32 = 32 (high vividness) ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 7 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data files: 'vviq_openeyes*.iqdat'/'VVIQ_closedeyes*.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 (perfectly clear and vivid) - 5 (no image at all) 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: 'vviq_summary*.iqdat' (a separate file for each 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) demographics: textbox.age.response: age response of participant radiobuttons.gender.response: gender response of participant textbox.occupation.response: occupation response of participant + VVIQ scores for the open and closed surveys as well as the VVIQ total/combined score Note: the lower the score, the higher the ability to imagine vviqopeneyes: Range 16-80 vviqclosedeyes: Range 16-80 vviq_total: Range 32-160 ___________________________________________________________________________________________________________________ QUESTIONNAIRE SET-UP ___________________________________________________________________________________________________________________ This script first presents the VVIQ with Eyes open and is then followed by the VVIQ with Eyes closed. A separate score as well as a combined score is obtained for each part. VVIQ_eyesopen.iqx => raw data for the VVIQ with eyes open instructions VVIQ_eyesclosed.iqx => raw data for the VVIQ with eyes closed instructions VVIQ_scores.iqx => scores for each survey as well as a total score ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ The htm instruction pages are provided by Millisecond Software (build on the instructions by A. Niazi). They were written to closely resemble the original (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. ___________________________________________________________________________________________________________________ EDITABLE CODE ___________________________________________________________________________________________________________________ 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: