Return to the White Bear Suppression Procedure page
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								*WHITE BEAR THOUGHT SUPPRESSION PROCEDURE*
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 06-03-2020
last updated:  06-03-2020 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 06-03-2020 Millisecond Software

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BACKGROUND INFO 	
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This script implements a computer adapted 'White Bear Thought Suppression Procedure' (Wegner et al, 1987); 
a procedure to investigate the paradoxical effect of attempting to suppress of conscious thought.

References

Wegner, D.M, Schneider, D.J, Carter, S.R, & White, T.L (1987). Paradoxical Effects of Thought Suppression. 
Journal of Personality and Social Psychology 53, 5–13.

Giuliano, R.J., & Wicha, N.Y. (2010). Why the white bear is still there: electrophysiological evidence for 
ironic semantic activation during thought suppression. Brain research, 1316, 62–74. 
https://doi.org/10.1016/j.brainres.2009.12.041

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TASK DESCRIPTION	
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Participants work through three phases of thought vocalizations:

Phase1: Participants are instructed to vocalize their thoughts for 5 minutes (editable) straight.
-> Inquisit records and provides a soundfile for this phase

Phase2: Participants are instructed to vocalize their thoughts for 5 minutes (editable) while 
being instructed to NOT think of a 'White Bear'. If they think of a 'White Bear', they are instructed 
to press the Spacebar.
-> Inquisit records and provides a soundfile for this phase as well as counts the number
of spacebar presses

Phase3: Participants are instructed to vocalize their thoughts for 5 minutes (editable).
If they happen to think of a 'White Bear', they are instructed to press the Spacebar
-> Inquisit records and provides a soundfile for this phase as well as counts the number
of spacebar presses

Note: if the task is performed on devices that have keyboards attached, the spacebar presses are
easily in the recorded soundfiles.

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DURATION 
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the default set-up of the script takes appr. 18 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: 'whitebearthoughtsuppression_raw*.iqdat' (a separate file for each participant)*


build:								The specific Inquisit version used (the 'build') that was run
computer.platform:					the platform the script was run on (win/mac/ios/android)
date, time, 						date and time script was run 
subject, group, 					with the current subject/groupnumber
script.sessionid:					with the current session id

blockcode, blocknum:				the name and number of the current block (built-in Inquisit variable)
trialcode, trialnum: 				the name and number of the currently recorded trial (built-in Inquisit variable)
										Note: trialnum is a built-in Inquisit variable; it counts all trials run; even those
										that do not store data to the data file. 
										
stimulusitem:						the presented stimuli in order of trial presentation
response:							the participant's response (scancode of response buttons)
									57 = spacebar

/countResponses:					counts the number of spacebar presses made during phase2 and phase3

latency: 							the response latency (in ms); measured from: onset of trial


(2) Summary data file: 'whitebearthoughtsuppression_summary*.iqdat' (a separate file for each participant)*

inquisit.build:						the version/build of Inquisit
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)
									
phase2Responses:					counts the number of spacebar-presses made during phase2 (thought suppression phase)									
phase3Responses:					counts the number of spacebar-presses made during phase3							
							
* separate data files: to change to one data file for all participants (on Inquisit Lab only), go to section
"DATA" and follow further instructions

(3) 3 Sound files per participant

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EXPERIMENTAL SET-UP 
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Participants work through three phases of thought vocalizations:

Phase1: Participants are instructed to vocalize their thoughts for 5 minutes (editable) straight.
-> Inquisit records and provides a soundfile for this phase

Phase2: Participants are instructed to vocalize their thoughts for 5 minutes (editable) while 
being instructed to NOT think of a 'White Bear'. If they think of a 'White Bear', they are instructed 
to press the Spacebar.
-> Inquisit records and provides a soundfile for this phase as well as counts the number
of spacebar presses

Phase3: Participants are instructed to vocalize their thoughts for 5 minutes (editable).
If they happen to think of a 'White Bear', they are instructed to press the Spacebar
-> Inquisit records and provides a soundfile for this phase as well as counts the number
of spacebar pressesse

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INSTRUCTIONS 
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provided by Millisecond Software - can be edited under section Editable Instructions
The instructions are taken from: Giuliano & Wicha (2010)

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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: