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COLOR RESPONSE Color MULTI SOURCE INTERFERENCE TASK (cMSIT) - (with multi-colored items, random order, color response)

SCRIPT INFO

This script was generously provided by Mario Wenzel, Thomas Kubiak and Tamlin Conner to be shared via Millisecond
Software's Script Library. Thank you!

last updated: 01-19-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC


BACKGROUND INFO

											*Purpose*
This script implements a Color Response Color Multi Source Interference Task ( color response cMSIT) 
with red/green stimuli and random presentation of stimuli that is similar to what has been described in:

Wenzel, M., Kubiak, T., & Conner, T. S. (2013). Positive affect and self-control: Attention to self-control 
demands mediates the influence of positive affect on consecutive self-control. Cognition and Emotion.
http://dx.doi.org/10.1080/02699931.2013.851069

In the Color Response cMSIT the target task is to identify the color that is different (not the digit that differs).


											  *Task*
Participants are presented stimuli consisting of 3 digits (1, 2, 3s) (or 1 digit and 2 X's = controls), e.g. 221
Two of the digits are the same digit (=distractors, e.g. 22) but one is different (= Target, 1). The target also differs
in size (either smaller or bigger) from the distractors. In addition, one of the digits (distractors or target)
has a different color. If the target is different in color the trial is COLOR congruent. If one of the distractors
is different in color the trial is COLOR INcongruent. Participants are asked to press a response button 
as fast as possible to report which COLOR was different.


DATA FILE INFORMATION: 
The default data stored in the data files are:

(1) Raw data file: 'MSITrandomRGcolor_raw*.iqdat' (a separate file for each participant)

build:							Inquisit build
computer.platform:				the platform the script was run on
date, time, subject, group:		date and time script was run with the current subject/groupnumber 
blockcode, blocknum:			the name and number of the current block
trialcode, trialnum: 			the name and number of the currently recorded trial
									(Note: not all trials that are run might record data) 
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response (scancode of response)
									19 => R
									34 => G
correct:						the correctness of the response (1 = correct; 0 = incorrect)
latency: 						the response latency (measured from onset of stimulus, in ms)

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

script.startdate:				date script was run
script.starttime:				time script was started
script.subjectid:				subject id number
script.groupid:					group id number
script.elapsedtime:				time it took to run script (in ms)
computer.platform:				the platform the script was run on
/completed:						0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
/propcorrect:					proportion correct overall
/meanRT:						mean latency (in ms) of all correct responses
/Std:							standard deviation of all correct latencies
/medianRT:						median latency (in ms) of all correct responses

EXPERIMENTAL SET-UP
- This script runs 150 trials (6 controls, 48 color congruent, 96 color incongruent) in random order.
- response buttons: G for green and R for red

Trial Sequence:
- fixation cross for 500ms
- stimulus presented for 2000ms
- accuracy feedback 500ms after response or stimulus timeout 

STIMULI
all stimuli are provided by Mario Wenzel, Thomas Kubiak and Tamlin Conner

control (target always printed larger and different in color; target position always congruent with response button position): 6 
	=> 2 color x 1 possible target fontsize x 1 possible identity of flanking letters x 3 target digits x 1 possible positions of target digit x 1 possible position of colored digit
color congruent (target differs in color; NO congruence of target position with response button position): 48 
	=> 2 colors x 2 possible target fontsizes x 2 possible identities of flanking numbers x 3 target digits x 2 possible positions of target digit x 1 possible position of colored digit
color incongruent (target does NOT differ in color; NO congruence of target position with response button position): 96
	=> 2 colors x 2 fontsizes x 2 identities of flanking numbers x 3 target digits x 2 possible positions of target digit x 2 possible positions of colored digit

INSTRUCTIONS
instructions are provided by Mario Wenzel, Thomas Kubiak and Tamlin Conner
and can be edited under EDITABLE CODE -> Editable Instructions

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.


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