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										HuskerDu - Memory Game
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 06-23-2016
last updated: 07-24-2017 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Script Copyright © 07-24-2017 Millisecond Software


BACKGROUND INFO 

											*Purpose*
This script implements a "HuskerDu" memory game

											  *Task*
											  
Participants are presented with a 8x8 matrix of covered cards. They are asked to find matching cards by
repeatedly turning over 2 cards. If the 2 uncovered cards match, they are removed from the game. If they don't match,
they are turned over once more. The game is over if all card pairs have been found.


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

(1) Raw data file: 'HuskerDu_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) 
/nrCards:						counts the number of cards in a game 
response:						the participant's response (e.g. selected matrix box)
latency: 						the response latency (in ms)
/response_nrSelections: 		stores the number of times the currently uncovered card has been uncovered yet 
/ pairID:						stores the pair ID of the currently selected pic
/ matchKnownForFirstCard:		1 = both cards of this pair have been uncovered at this point; 0 = otherwise
/ match:						0 = no match between card1 and card2; 1 = match between card1 and card2
/responseCategory:				"no match" (= not a match, but the match to the uncovered card has not been uncovered yet), 
								"MISS" (=failure to uncover the match to a card if that matching card has previously been uncovered at least once), 
								"lucky guess" (= a successful match when the matched card (2nd turned) had NOT been previously uncovered yet AND there is still a degree of uncertainty (p <= 0.5) left where it could be)
								"HIT"(=successful matching of a card if the match has previously been uncovered at least once OR p=1 to select the correct match)
/ card1:						itemnumber of the first uncovered card
/ card2:						itemnumber of the second uncovered card
/countAttempts:					counts the number of match attempts
/countMatches:					tracks the number of matches found  						
/countLuckyGuesses:				counts all Matches that happen if the matching card had not been previously selected yet (and there is still a degree of uncertainty where it could be)
/countMisses:					counts all Misses (=failure to match a card if the match has previously been uncovered at least once)
/countHits:						counts all Hits (=success to match card if matching card has previously been turned over OR no more uncertainty where it could be)
/countNoMatches:				counts all No Matches that are not a Miss

(2) Summary data file: 'HuskerDu_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)
/totalCards:					the number of cards in a game (needs to be an even number) (Min: 2- Max: 64) 
/gameDuration:					stores the duration of the game (in ms); measured from time of matrix presentation to matching the last pair
/countAttempts:					counts the number of match attempts
/countMatches:					tracks the number of matches found  						
/countLuckyGuesses:				counts all Matches that happen if the matching card had NOT been previously selected (and there was still a degree of uncertainty to where it could have been)
/propLuckyGuesses: 				the proportion of Lucky Guesses (number of Lucky Guesses relative to all matching attempts)
/countMisses:					counts all Misses (=failure to match a card if the match has previously been uncovered at least once)
/propMisses:					the proportion of Misses (number of Misses relative to all matching attempts)
/countHits:						counts all Hits (=success to match card if matching card has previously been turned over OR no more uncertainty where it could be)
/propHits:						the proportion of Hits (number of Hits relative to all matching attempts)
/countNoMatches:				counts all No Matches that are not a Miss
/propNoMatches:					the proportion of NoMatches (number of No Matches relative to all matching attempts)

* separate data files: to change to one data file for all participants (on Inquisit Lab only), go to section
"DATA" and follow further instructions


EXPERIMENTAL SET-UP
- a predetermined number of items are randomly selected (max. 32 cards to make 32 pairs) and a 
pair identification number assigned
- the paired cards are distributed randomly across a 8 x 8 matrix

- script tracks "lucky guesses" (matches when the location of the matching card is not certain), "Hits" 
(match between cards when the location of the 2nd card had been previously uncovered or is not uncertain),
'misses' (missed matches when the match had been previously uncovered) and "no matches"
(no matches when the location of the 2nd card is still uncertain).

STIMULI
provided by Millisecond Software (by default: 100 images of flora and fauna)
can be edited under 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:

/totalCards = 64			the number of cards in a game (needs to be an even number) (Max: 64 => 8 x 8 matrix)

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