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									  AUDITORY STROOP (Gender)
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 11-10-2014
last updated: 08-15-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 08-15-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script runs the Gender AuditoryStroop Task described by:

Green, E.J. & Barber, P.J. (1981). An auditory Stroop effect with judgments of speaker gender. 
Perception &Psychophysics, 30, 459-466.	

											  *Task*
Participants hear words spoken in a female or male voice and have to sort them accordingly.
Some words are stroop words ("man" vs. "girl") some are control words ("mill" vs. "game").
Control and stroop words are tested either in a mixed or in a blocked design.


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

(1) Raw data file: 'AuditoryStroop_Gender_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) 
/presentation:					"mixed" vs. "blocked"
/condition:						"Stroop" vs. "Control"
/gender:						"male" vs. "female" recording voice
/congruency:					"congruent" vs. "incongurent" (for control words this distinction is pseudo-congruency)
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response (scancode of response button)
correct:						the correctness of the response (1 = correct; 0 = incorrect)
latency: 						the response latency (in ms)

(2) Summary data file: 'AuditoryStroop_Gender_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)
/count_congruentStroop:			counts congruent Stroop trials
/count_incongruentStroop:		counts incongruent Stroop trials
(same for control trials)

/propcorrect_congruentStroop:	proportion correct congruent Stroop trials
/propcorrect_incongruentStroop:	proportion correct incongruent Stroop trials
(same for control trials)

/meanrt_congruentStroop:		mean latency (in ms) for correct congruent Stroop trials
/meanrt_incongruentStroop:		mean latency (in ms) for correct congruent Stroop trials
(same for control trials)


EXPERIMENTAL SET-UP
within-participant: Stroop vs. Control words
between-participant: mixed vs blocked presentation of stroop and control words (selected by groupnumber: odd -> mixed; even -> blocked)
	blocked: block.controlwords; block.stroopwords => each run the 4 stimuli x 6 repetitions (for a total of 2 x 24 = 48 trials)
		Note: the order of the blocks is randomly determined
	mixed: block.genderstroop (run twice) => each run 8 stimuli x 3 repetitions (for a total of 2 x 24 = 48 trials)

Responsekeyassignments are counterbalanced by groupnumber (more info under section EXPERIMENT)

Practice:
- Blocked: each test block is preceded by an 8-trial practice session (each word is presented twice)
- Mixed: one practice block of 16 trials before the test blocks

Trials:
each trial lasts 5s (soa = 5s btw onset of consecutive stimuli);
speed can be adjusted under Editable Parameters

STIMULI
Stroop Words: Man, Girl
Control Words: Mill, Game

Recordings are provided by Millisecond Software and were done by a single male and a 
single female voice in Audacity (native speakers of American English)

The sound files can be exchanged under section Editable Stimuli

INSTRUCTIONS
Instructions are not original. They are provided by Millisecond Software and can be
edited under 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.

The parameters you can change are:

/responsekey_left:						scancode of the left response key
											Note: scancodes under Tools -> Keyboard Scancodes (default: 30)
/responsekeyleft_label:					label of the left response key (default: A)
/responsekey_right:						scancode of the right response key
											Note: scancodes under Tools -> Keyboard Scancodes (default: 38)
/responsekeyright_label:				label of the right response key (default: L)

/soa:									stimulus onset asynchrony: time between onset of one stimulus and the onset of the next
										in ms (default: 5000) -> every 5 s a new word is spoken.

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