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								  Running Memory Span Task
SCRIPT INFO

Script Author: David Nitz (dave@millisecond.com) for Millisecond Software, LLC
last updated: 01-22-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 01-22-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements the Running Memory Span Task described in:

Broadway, J. M., & Engle, R. W. (2010). Validating Running Memory Span: Measurement 
	of working memory capacity and links with fluid intelligence. Behavior Research Methods, 
	42 (2), 563-570.

Task Copyright (c) 2010 by Jim Broadway and Randall Engle (http://psychology.gatech.edu/renglelab/)


											  *Task*
Participants are presented a series of letters of varying length (3-8) and when prompted have to report
the last N items (3-6) of the list (they do not know N until they are prompted).
The N items are called the 'targets' of the series; the remaining items are the 'distractors'.
Together targets and distractors make up the 'input'.

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

(1) Raw data file: 'RunningSpan*.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) 
/recalltrial:					counts the number of recall trials run 
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)
/inputrate:						rate at which letters are presented
/nTargets:						number of targets presented
/nDistractors:					number of distractors presented
/nInputs:						number of presented letters (targets + distractors)
text.letter.currentitem:		the currently presented letter
/recalledletters:				the targets of the current set that participant recalled
/runspantotal:					sum of all correctly recalled targets
/runspanscore:					sum of all correctly recalled targets of sets with at least 1 distractor

(2) Summary data file: 'summarydata*.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)
/runspantotal:					sum of all correctly recalled targets
/runspanscore:					sum of all correctly recalled targets of sets with at least 1 distractor



EXPERIMENTAL SET-UP

(A) 1 Practice Phase:
* 1 level of N targets (2) x 4 numbers of distractors (0, 1, 2, 3)
- order of number of distractors randomized

(B) 1 Test Phase:
* 4 levels of N targets (3, 4, 5, 6) x 3 numbers of distractors (0, 1, 2)
- level of N tested in blocked design, order of N is randomized
- order of number of distractors randomized within each block

default timings: fixation(500ms) -> blank(500ms) -> letter(300ms) -> blank(200ms)


STIMULI
see section Editable Stimuli

INSTRUCTIONS
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:

	Inputrate can be set to either 2500 or 500. The resulting stimulus timings are
	2500ms: 	fixation(500) -> blank(500) -> letter(300) -> blank(2200)
	500ms: 		fixation(500) -> blank(500) -> letter(300) -> blank(200)

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