Return to the Temporal Reproduction Task page
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										*TEMPORAL REPRODUCTION*
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 06-04-2013
last updated:  11-05-2019 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 11-05-2019 Millisecond Software

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BACKGROUND INFO 	
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This script implements the Temporal Reproduction procedure as described in:

Wittmann, M., Leland, D.S., Jan Churan, J. & Paulus, M.P.(2007). Impaired time perception and motor timing
in stimulant-dependent subjects. Drug and Alcohol Dependence, 90, 183–192.

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TASK DESCRIPTION	
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Participants are asked to estimate the duration of a target tone (tone 1, 1-5s) by manually 
interrupting (-> Spacebar) a comparison tone (tone 2) when they think tone 2 was played as long as tone 1.
Participants are actively discouraged from counting seconds by introducting a distractor task.
Before tone 1 is played two target symbols appear on the screen that participants are asked to remember for
a later forced-choice recognition task. At the end of the entire trial sequence, a comparison symbol is presented and 
participants have to decide whether this symbol was one of the two target symbols.

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DURATION 
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the default set-up of the script takes appr. 8 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: 'remporalreproduction_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 such as feedback trials. Thus, trialnum 
										may not reflect the number of main trials run per block.
									
values.firstdistractor:					stores the index of the first distractor symbol
values.seconddistractor:				stores the index of the second distractor symbol
values.select_compdistractor:			stores current index of the comparison distractor
values.tone1duration:					stores the current duration of Tone1
values.estimation_rt:					latency of estimation (in ms)
response:							the participant's response

correct:								the correctness of the response (1 = correct; 0 = incorrect)
									Note: relevant only for comp-distractor question
									
latency: 								the response latency (in ms)


(2) Summary data file: 'temporalreproduction_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)

expressions.distractortask_errorrate:			recognition error proportion for distractortask

expressions.mean_estimation_t1 -:				mean estimation time (in ms) for t1 to t5
expressions.mean_estimation_t5

expressions.std_estimation_t1- :				standard deviation of the estimation times for t1 to t5
expressions.std_estimation_t5

expressions.cv_t1-:							coefficient of variation for t1 to t5			
expressions.cv_t5

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EXPERIMENTAL SET-UP 
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a) Main Task: Temporal Reproduction
IV = duration of target tone (here: 1000ms, 2000ms, 3000ms, 4000, 5000ms) tested within-subjects
Main DV: latency of estimation (how long it takes participants to press  after Tone 2 starts playing)

*Each level of the IV is repeated 6 times for a total of 30 trials.
*the order is determined randomly
*target tone 1 (300Hz)/comparison tone 2 (600Hz) have a maximum duration of 20,000ms/25,000ms in this script 
(replace under section Editable Stimuli for longer durations; the tones for this script were created with
Audacity)

b) Distractor Task: forced-choice Recognition Task
Note: the original article does not specify the details of this task
In this script: 10 symbols (customize under section Editable Stimuli)
* each symbol appears 6 times as one of the target symbols
* in half the time the comparison symbol is familiar 
(it's randomly decided which one of the two symbols is chosen for familiar trials)

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STIMULI
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provided by Millisecond Software - can be edited under section Editable Stimuli

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INSTRUCTIONS 
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Instructions provided with this script are not the originals. Customize under 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:

/durationbtwtones:					posttrialpause after presenting tone1 in ms(default: 1000)
/ITI:								intertrialinterval, break inbetween main trial sequences in ms (default: 2000)
/distractorduration:				duration of the target distractors in ms(default: 1000)

tone1 duration settings (in ms):	the 5 levels of the IV
/t1 = 1000										
/t2 = 2000							Note: the provided sound files last for max 20s(tone1)/25s(tone2); for longer durations	
/t3 = 3000							these sound files need to be replaced
/t4 = 4000
/t5 = 5000

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