Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond
Created: January 23, 2016
Last Modified: January 07, 2025 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script implements a "HuskerDu" memory game
7 minutes
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.
- 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).
provided by Millisecond (by default: 100 images of flora and fauna)
can be edited under section Editable Stimuli
see section Editable Instructions
File Name: huskerdu_summary*.iqdat
| Name | Description |
|---|---|
| inquisit.version | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| startDate | Date the session was run |
| startTime | Time the session was run |
| subjectId | Participant ID |
| groupId | Group number |
| sessionId | Session number |
| elapsedTime | Session duration in ms |
| completed | 0 = Test was not completed 1 = Test was completed |
| totalCards | Parameter: 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 (number of success) |
| 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) |
File Name: huskerdu_raw*.iqdat
| Name | Description |
|---|---|
| build | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| date | Date the session was run |
| time | Time the session was run |
| subject, group, | With the current subject/groupnumber |
| session | Session number |
| blockCode | Name of the current block |
| blockNum | Number of the current block |
| trialCode | Name of the current trial |
| trialNum | Number of the current trial |
| 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) |
| responseNrSelections | 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 |
The procedure can be adjusted by setting the following parameters.
| Name | Description | Default |
|---|---|---|
| totalCards: | The number of cards in a game (needs to be an even number) (Max: 64 => 8 x 8 matrix) | 64 |