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									     STROOP TEST - voice input
SCRIPT INFO

last updated:  08-15-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC
Script Copyright ©  08-15-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements an example Stroop test with voice input.
It runs a color naming task and a word naming task. The order is counterbalanced by groupnumber.

Reference:
Stroop, J, R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18, 643-662.

											  *Task*
Participants are asked to do a Color Naming and a Word Naming Task.
For both task, color words (e.g. red, blue) are presented in different colors. In some of the cases,
the color word (e.g. red) and its color (e.g. red) are congruent; in other cases the color word (e.g. red)
and its color (e.g. blue) are discongruent.
For the Color Naming Task, participants have to say the color of the word as fast as possible.
For the Word Naming Task, participants have to say the actual word as fast as possible disregarding their color.


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

(1) Raw data file: 'StroopTest_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; by default data is collected unless /recorddata = false is set for a particular trial/block) 
/congruence:					1= congruent; 2 = incongruent
/color:							contains current color of the word
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response
correct:						the correctness of the response (1 = correct; 0 = incorrect)
latency: 						the response latency (in ms)
/countcorrect_congruent:		counts all congruent trials in which participant responded correctly in a block
/count_congruent:				counts all congruent trials in a block
/sumRT_congruent:				sums up the latencies of all congruent trials in which participant responded correctly in a block
/errorate_congruent:			mean errorrate for congruent trials
/countcorrect_incongruent:		counts all incongruent trials in which participant responded correctly in a block
/count_incongruent:				counts all incongruent trials in a block
/sumRT_incongruent: 			sums up the latencies of all incongruent trials in which participant responded correctly in a block
/errorate_incongruent:			mean errorate for incongruent trials

(2) Summary data file: 'StroopTest_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)
/meanrt_C_Color:				mean latencies for correct congruent (c) and correct incongruent (ic) stimuli in the color block
/meanrt_IC_Color
/errorrate_C_Color:				mean errorate for correct congruent (c) and correct incongruent (ic) stimuli in the color block
/errorrate_IC_Color
/meanrt_C_word :				mean latencies for correct congruent (c) and correct incongruent (ic) stimuli in the word naming block
/meanrt_IC_word 
/errorrate_C_word:				mean errorate for correct congruent (c) and correct incongruent (ic) stimuli in the word naming block
/errorrate_IC_word


EXPERIMENTAL SET-UP
This script runs a color naming task and a word naming task. The order is counterbalanced by groupnumber.
odd groupnumbers -> color naming task, word naming task
even groupnumbers -> word naming task, color naming task

Color Naming Task: 25 trials - 5 repetitions of the 
each of the 5 color words (red, green, blue, black, yellow) is presented in each of the 5 colors once (= 4 incongruent: 1 congruent trials)
Participants have to name the color of the word as fast as possible (disregarding the word's meaning)

Word Naming Task: 25 trials - 5 repetitions of the 
each of the 5 color words (red, green, blue, black, yellow) is presented in each of the 5 colors once.
Participants have to say the word as fast as possible (disregarding its color)

STIMULI
The five color words: red, green, blue, black, yellow

INSTRUCTIONS
see section 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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