Luck & Vogel Visual WM Task
Visual working memory task that requires participants to detect changes in arrays of colored objects, measuring visual working memory capacity.
Participants view arrays of colored squares (1-12 items) presented briefly (300ms default), followed by a delay (1000ms default), then a second array. They must judge whether the second array is identical to the first or if one color has changed. Left shift key indicates 'same', right shift key indicates 'different'. The task includes practice trials with feedback demonstrating both same and different trials, followed by the main test with configurable set sizes and trials per condition. Feedback can be provided during the test (configurable).
Measures: Visual working memory capacity, change detection, visual attention
- Uses color-blind safe color palette (orange, skyblue, bluegreen, yellow, vermillion, white, black)
- Task includes practice trials with examples of both 'same' and 'different' trials before main test
- Set sizes are configurable via parameters (default: 1,2,3,4,8,12 items)
- Trials are fully counterbalanced across set sizes and same/different conditions
- Optional rest breaks after every N trials (configurable via blocksize parameter)
- Audio feedback (correct.ogg, buzz500ms.ogg) is optional and configurable
| fieldWidth | Width of field in pixels (default: 400) |
| fieldheight | height of field in pixels (default: 400) |
| squaresize | size of square stimuli (default: 50) |
| prestime | presentation time (default: 300) |
| delaytime | delay blank (default: 1000) |
| length1 | size of problem (default: 1) |
| length2 | size of problem (default: 2) |
| length3 | size of problem (default: 3) |
| length4 | size of problem (default: 4) |
| length5 | size of problem (default: 8) |
| length6 | size of problem (default: 12) |
| trialsperlength | Number of trials for each length for both match and mismatch (default: 10) |
| givefeedback | Whether trial-by-trial feedback should be given. (default: 1) |
| blocksize | Pause for a rest after this many blocks (default: 40) |
| useaudiofeedback | Whether to give audio feedback (default: 1) |
| responsemode | Response method: auto (platform-aware), keyboardShift (L/R shift), keyboardSafe (Z/slash for web), arrowLR (left/right arrows), mousetarget (click targets), touchtarget (tap targets), mousebutton (L/R mouse buttons), userselect (custom key) (default: auto) |
| Validation | validated |
| Psychometric data | Available |
| Normative data | Available |
| subnum | trial | prestime | delay | size | same | resp | corr | rt |
|---|---|---|---|---|---|---|---|---|
| example | 1 | 300 | 1000 | 2 | 1 | <rshift> | 1 | 964 |
| example | 2 | 300 | 1000 | 1 | 1 | <rshift> | 1 | 1024 |
| example | 3 | 300 | 1000 | 3 | 1 | <rshift> | 1 | 993 |
| example | 4 | 300 | 1000 | 4 | 1 | <lshift> | 0 | 1234 |
| example | 5 | 300 | 1000 | 1 | 1 | <rshift> | 1 | 1294 |