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									  PROSPECTIVE TIME ESTIMATION
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 06-24-2013
last updated: 02-03-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 02-03-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements a Prospective Time Estimation procedure similarly to the one 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. (p.184)

											  *Task*
Participants are asked to estimate a time interval that starts with the presentation of a green circle and a
recording saying "start" and ends with the presentation of a red circle and the sound of an alarm. 
After pressing the Spacebar to turn off the alarm, participants are asked to estimate the duration of the time 
interval on a slider with 1s increments (0-3min).


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

(1) Raw data file: 'ProspectiveTimeEstimation_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) 
/timeinterval:					time interval to estimate in ms (default: 53000ms = 53s)
/intervalestimation:			stores the participant's estimation
latency: 						the response latency (in ms)

(2) Summary data file: 'ProspectiveTimeEstimation_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)
/timeinterval:					time interval to estimate in ms (default: 53000ms = 53s)
/intervalestimation:			stores the participant's estimation


EXPERIMENTAL SET-UP
Participants are played a tone for a set time interval (editable).
Afterwards they have to estimate the length of the time interval via a slider-response 
	
STIMULI
see section Editable Stimuli

INSTRUCTIONS
Instructions are not original. They are displayed in the form of an htm page (to make changes, edit the htm-file directly).
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.

The parameters you can change are:

/timeinterval:				time interval to estimate in ms (default: 53000ms = 53s)
							Note: 	if time interval is changed, slider.te_response may have to be adapted
									accordingly

/pretrialpause:				pause in ms (empty screen) before green circle appears after starting the task

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