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							 MILLISECOND LETTER-NUMBER-SEQUENCING TEST (AUDITORY)
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 03-31-2016
last updated: 04-21-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 04-21-2016 Millisecond Software


BACKGROUND INFO 

											*Purpose*
This script implements a computerized version of a Letter-Number-Sequencing Test similarly to the 
one used in the Wechsler Adult Intelligence Scale (WAIS).
This script presents a randomly generated spoken letter-number sequences and accepts written input.


											  *Task*
Participants receive growing series of alternating letters and digits. In this script, the sequences always start with a letter.
2 Recall Conditions:											  
LNS-Forward: Participants have to recall the letters and digits in the order presented
LNS-Reordered: Participants have to recall first the digits from smallest to largest and then the letters in alphabetical order	  


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

(1) Raw data file: 'MSLetterNumberSequencingTest_auditory_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) 
/setSize:						number of stimuli in the current sequence (2-8)
/attempt:						number of attempts at a given set size (max. 3)
/presentedSequence:				stores the presented sequence of letters and numbers
/correctResponse:				stores the correct response
response:						the participant's response
/response:						stores the response after 'cleanup' (after removal of possible empty spaces, comas or semicolons; lower case letters are converted to upper case letters)
correct:						the correctness of the response (1 = correct; 0 = incorrect)
latency: 						the response latency (in ms)
/TotalPoints_LNF:				sums up all the points for condition LNF
/TotalPoints_LNR:				sums up all the points for condition LNR
/totalPoints:					combined total points across the two tasks

(2) Summary data file: 'MSLetterNumberSequencingTest_auditory_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)
/maxSetSize_LNF:				stores the last successful set size for condition LNF
/maxSetSize_LNR:				stores the last successful set size for condition LNR
/TotalPoints_LNF:				sums up all the points for condition LNF
/TotalPoints_LNR:				sums up all the points for condition LNR
/totalPoints:					combined total points across the two tasks


EXPERIMENTAL SET-UP
* 2 conditions: LNF, LNR: order is counterbalanced (determined by groupnumber).
odd groupnumbers: LNF -> LNR
even groupnumbers: LNR -> LNF
By default, each condition runs one practice/demo trial with 4 characters and receives performance feedback (practice set size can be edited). 

* Set Sizes tested: 2-8 stimuli, Stimulus Onset Asynchrony ~1000ms (editable parameter)
* 3 trials at each level (1 point per correct response for a maximum of 21)
* needs to get at least 1 correct to advance to next set size

STIMULI
letters: all 26 letters of the English alphabet (change selection under section Editable Stimuli)
digits: 1-9 (change under section Editable Stimuli) Note: 0 was excluded due to its resemblance with 'O'

soundfiles are in American English.

Sequence Generation: 
* the letters and digits are randomly drawn for each sequence (no repeats)
* letters and digits alternate and sequences always start with a letter

INSTRUCTIONS
Instructions are provided by Millisecond Software. They can be edited under section "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:

/SOA:					the stimulus onset asynchrony, a new sound file is played every 1s (default: 1000ms)
/SRI:					the interval (in ms) between offset of last stim and onset of recall textbox (default: 1000ms)
/ITI:					intertrial interval (in ms); time btw. last response and onset of next sequence (default: 1000ms)
/practiceSetSize:		the setSize used for demo/practice trial (default: 4)

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