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									Dot Estimation Task
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last updated:  11-08-2019 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 11-08-2019 Millisecond Software

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BACKGROUND INFO 	
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This script implements a Dot Estimation Task, a quick task to manipulate 'Group Membership' by arbitrarily assigning
participants to one of two groups seemingly based on their performance on this task.

Reference:

Mussweiler, T., Gabriel, S., & Bodenhausen, G.V. (2000). Shifting Social Identities as a Strategy for Deflecting
Threatening Social Comparisons. Journal of Personality and Social Psychology, 79, 398-409.

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TASK DESCRIPTION	
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Participants view several slides that contain a varying number of dots for 1000s (not enough time to count all the dots)
and are subsequently asked to estimate the number of dots.
Based on their preassigned groups, they are told at the end that they are either "underestimators" or "overestimators"
regardless of their actual estimation performance.

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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: 'dotestimationtask_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.
										
estimatortype:					between group condition "Underestimator"/"Overestimator"										
stimulusitem:						the presented Dot image
response:						the participant's response
latency: 							the response latency (in ms)

(2) Summary data file: 'dotestimationtask_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)
									
estimatortype:					between group condition "Underestimator"/"Overestimator"


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EXPERIMENTAL SET-UP 
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* assigns participants to "overestimator" and "underestimator" condition via groupnumber
(odd -> underestimator; even -> overestimator)
* presents 11 slides of dots in sequence for 1000ms (default)
* presents feedback at the end according to assigned group independent of actual estimation

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STIMULI
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see section Editable Stimuli

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INSTRUCTIONS 
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see section Editable Instructions

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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:

	pretrialpause:	Adjustable delay in milliseconds. Change as needed.
	dotduration:		Display duration for the dot patterns in milliseconds.