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									LETTER FLUENCY - with voice recordings
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 1-29-2015
last updated:  08-15-2016 by K.Borchert for Millisecond Software LLC

Copyright ©  08-15-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script runs a simple Letter Fluency Test with phonetic categories (letters A, F, S) similar to 
the Controlled Oral Word Association Test (COWAT).
This test collects verbal input combined with 'Spacebar' presses for each valid 
word (by Test Administrator).

											  *Task*
Participants are asked to name as many words as they can that begin with letters A, F, S (tested in blocked-design).
They have  2 min for each letter (default). 
Test Administrators should press the Spacebar for each valid word.
Soundfiles are saved for each letter for additional analyses.


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

(1) Raw data file: 'LetterFluency_voicerecordings_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) 
stimulusitem:					the presented stimuli in order of trial presentation
response:						the participant's response
latency: 						the response latency (in ms)

/targetletter:					stores the currently run targetletter
/response:						stores the string response for a given targetletter
/response_nospaces:				stores the string response for a given targetletter minus spaces
/wordcount:			estimates word count by comparing the length of the response with and without spaces

(2) Summary data file: 'LetterFluency_voicerecordings_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)
/estimatetotal:					sum of the estimated wordcounts for the 3 letters
/targetletter1:					stores the first targetletter (default: "A") ('first' does not refer to order in which letters were run in)
/targetletter2:					stores the second targetletter (default: "F")
/targetletter3:					stores the third targetletter (default: "S")
/wordcount1-
/wordcount3:			estimates word count by comparing the length of the response with and without spaces for a given target letter


EXPERIMENTAL SET-UP
3 blocks: one block per targetletter
each block has a timelimit of 2min (editable parameter)

Word Count-Estimate: Algorithm
Inquisit attempts to estimate the number of words for each letter by
- replacing all spaces up to 5 with a single space
- replacing all line breaks with a single space
- comparing the response string that contains only single spaces with a response strings that contains no
spaces at all 
=> the estimated word count is the differences in string length plus 1
(e.g. "slug snail snake" vs. "slugsnailsnake" => 2 spaces + 1 = 3 words)

Note: the algorithm only provides a rough estimate of the word count (and it does NOT
check whether the words are correct)

STIMULI
This script test letters A, F, S because of their frequency in English
Different letters can be substituted under EDITABLE CODE -> Editable Values

INSTRUCTIONS
provide by Millisecond Software - instructions can be edited under
EDITABLE CODE -> 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:

/targetletter1:				stores the first targetletter (default: "A")
/targetletter2:				stores the second targetletter (default: "F")
/targetletter3:				stores the third targetletter (default: "S")

/timelimit:					stores the number of ms that participants have to come up with the words (default: 120000ms => 2min)
/warningduration:			stores the duration in ms of the warning signal to prepare participants to get ready for next round (default: 1000ms)


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