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									DELAYED MATCHED-TO-SAMPLE (DMTS)
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 02-27-2015
last updated: 01-08-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 01-08-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script runs the a Delayed Matched to Sample Procedure (DMTS) similarly to the one published in

PAULE, M. G., BUSHNELL, P. J., MAURISSEN, J. P. J., WENGER, G. R.,
BUCCAFUSCO, J. J., CHELONIS, J. J., et al. (1998). Symposium overview: The
use of delayed matching-to-sample procedures in studies of short-term memory
in animals and humans. Neurotoxicology and Teratology, 20, 493-502. (p.497)

The implemented DMTS procedure is intended for animal research.


											  *Task*
Participants are presented with a target color disk (e.g. red) for a minimum of 5s (default). After the minimum
viewing time a mouse click will remove the target and start the delay interval. Several delays are tested.
Once the delay is over, two colored disks are presented on the bottom of the screen.
One of the disk has the same color as the target (red); the other is a comparison color (yellow or green).
Participants need to press the target color (Note: for a non-matched to sample procedure, simply go to
trial.dmts_match and follow instructions).
Clicking one of the colored disks initiates an intertrial interval of 5s (default).


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

(1) Raw data file: 'DMTS_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) 
/delaycondition:				1 = delay1; 2 = delay2; 3 = delay3; 4 = delay4
/delay:							stores the currently tested delay
/targetlocation:				1 = left; 2 = right
/targetcolor:					1 = red; 2 = green; 3 = yellow
/compcolor:						1 = red; 2 = green; 3 = yellow				

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)

(2) Summary data file: 'DMTS_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_delay1-
/propcorrect_delay4: 			proportion correct responses for the 4 different delay conditions

/meanRT_delay1-
/meanRT_delay4:					mean latencies of correct responses for the 4 different delay conditions


EXPERIMENTAL SET-UP
3 colors: red, green, yellow 
4 delays: predetermined

* Each color is presented equally often as target and each color is paired with each other equally often.
Target colors appear equally often on the left and right.
=> for 3 target colors x 2 comp colors x 2 locations x 4 delays =>  48 trials per block.dmts
* block.dmts is run twice for 2 x 48 = 96 trials
* Order of trials is randomly determined.

STIMULI
are red, green, and yellow disks presented on a black background.
Stimuli were prepared in Paint.Net by Millisecond Software

INSTRUCTIONS
default script is meant for animal research


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:

/min_stimulusduration:					minimum presentation duration of the targets in ms (default: 5000ms)

/delay1:								0 ms delay
/delay2:								short delay (unless individualized delays are determined) in ms (default: 1000ms)
/delay3:								medium delay (unless individualized delays are determined) in ms (default: 4000ms)
/delay4:								long delay (unless individualized delays are determined) in ms (default: 20000ms)

/iti:									inter trial interval in ms (default: 5000ms)

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