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								*Self-Paced Reading (Moving Window Paradigm)*
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Script Author: David Nitz (dave@millisecond.com) for Millisecond Software, LLC
last updated:  03-13-2020 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC

Script Copyright © 03-13-2020 Millisecond Software

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BACKGROUND INFO 	
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This script implements the  Self-Paced Reading procedure described in:

	Just, M. A., Carpenter, P. A., & Woolley, J. D. (1982). Paradigms and processes in reading 
	comprehension. Journal of Experimental Psychology: General, 111(2), 228-238.

	Related resources:

	Just, M. A., & Carpenter, P. A. (1980). A theory of reading: From eye fixations to 
	comprehension. Psychological Review, 87(4), 329-354.

	Thibadeau, R., Just, M. A., & Carpenter, P. A. (1982). A model of the time course and
	content of reading. Cognitive Science, 6, 157-203.

	Mitchell, D. C. (2004). On-line methods in language processing: Introduction and historical 
	review. In M. Carreiras & C.E. Clifton, Eds., The on-line study of sentence comprehension: 
	Eyetracking, ERP and beyond (pp. 15-32). New York, NY: Psychology Press.
	
Note: Currently this program only supports left-to-right (LTR) languages.

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TASK DESCRIPTION
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Masked text examples are presented and revealed word by word by Spacebar press.
2 conditions: 

cumulative => words already revealed stay revealed
non-cumulative => words that have previously been revealed are masked again when the next word is revealed										  

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DURATION 
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the default set-up of the script takes appr. 4 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: 'selfpacedreading_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. 
																		
response:							the participant's response
correct:							the correctness of the response (1 = correct; 0 = incorrect)
latency: 							the response latency (in ms)

list.mwstims.nextvalue:				current "page" number 
values.wincount:					Ordinal number of the currently displayed (target) text segment (window).
values.windowstring:				The current window (always unmasked)

text.mywindow.stimulusonset:		returns the stimulus onset time in ms. The onset time is the point at which the stimulus 
									is presented relative to the start of the trial.			

expressions.inputend				Returns the total number of characters of the current input string
									(paragraph or sentence to be displayed in window segments). Used
									to determine the end of the paragraph and initiate the selection of 
									the next stimulus (sentence or paragraph).
									
values.winstart						Start position of current text segment (window).
values.winend						End position of current text segment (window)


 
parameters.cumulative				Determines the moving window mode to use. If set to 'true', any 
									previously displayed window segments will remain visible on the 
									screen. If set to 'false' any previously displayed window segments will
									be remasked (noncumulative mode). Default is 'false'.
									
parameters.highlight				Determines whether the current window should be displayed in a 
									different color than the remaining (masked or unmasked) text in 
									order to make it more salient. The highlighting color can be adjusted 
									via the '/ txcolor' attribute of 'text.mywindowhl'. Default is 'true'.
									

(2) Summary data file: 'selfpacedreading_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)


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EXPERIMENTAL SET-UP 
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runs 2 conditions:
Cumulative (revealed words stay revealed) and Non-cumulative (once revealed words get mask again)
	
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STIMULI
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see section Editable Stimuli

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INSTRUCTIONS 
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see 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:

	windicator					A single character that indicates each display segment (window). 
								Must be set to a character which doesn't occur "naturally" in throughout
								the stimulus material (e.g. '|' or '#'). Each stimulus must start and end 
								with this character. Default is "I".
								
	cumulative					Determines the moving window mode to use. If set to 'true', any 
								previously displayed window segments will remain visible on the 
								screen. If set to 'false' any previously displayed window segments will
								be remasked (noncumulative mode). Default is 'false'.
								
	highlight					Determines whether the current window should be displayed in a 
								different color than the remaining (masked or unmasked) text in 
								order to make it more salient. The highlighting color can be adjusted 
								via the '/ txcolor' attribute of 'text.mywindowhl'. Default is 'true'.
								
	ucmaskchar					Character used to mask uppercase letters and numbers (as defined in 
								'list.uppercase'). Suitable characters include (but are not limited to)
								"-", "—", "_" or "…". The masking character may not be identical to
								the character defined as window indicator (-> 'parameters.windicator')!
								Default is "-".
								
	lcmaskchar					Character used to mask lowercase letters and interpunctuation 
								characters (as defined in 'list.lowercase'). Suitable characters 
								include (but are not limited to) "-", "—", "_" or "…". The masking 
								character may not be identical to the character defined as window 
								indicator (-> 'parameters.windicator')! Default is "-".