Luck & Vogel Visual WM Task
System Requirements
Minimum: 900×800
Recommended: 1024×800
Description
Visual working memory task that requires participants to detect changes in arrays of colored objects, measuring visual working memory capacity.
About This Test
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).
Test Details
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Scientific Background
Original Task References:
These references describe the original task that this PEBL implementation is based on.
- Luck, S. J., & Vogel, E. K. (1997). The capacity of visual working memory for features and conjunctions. Nature, 390(6657), 279-281.
PEBL-Specific References:
These studies used the PEBL version of this task.
- Mueller, S. T., & Piper, B. J. (2014). The Psychology Experiment Building Language (PEBL) and PEBL Test Battery. Journal of Neuroscience Methods, 222, 250-259.
Data Output
Creates one CSV data file with trial-level information including set size, same/different condition, response, accuracy, and reaction time.
Example Data
| 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 |
| example | 6 | 300 | 1000 | 4 | 1 | <rshift> | 1 | 2589 |
| example | 7 | 300 | 1000 | 3 | 1 | <rshift> | 1 | 2085 |
| example | 8 | 300 | 1000 | 3 | 0 | <lshift> | 1 | 2015 |
| example | 9 | 300 | 1000 | 8 | 1 | <lshift> | 0 | 1040 |
Sample data showing typical output format. Actual values will vary by participant.
About This Test
Visual working memory task that requires participants to detect changes in arrays of colored objects, measuring visual working memory capacity.
Category: Memory
Estimated Duration: 15 minutes
Available Translations: 7 languages
Documentation Sources:
Test description file, Test implementation, Parameter schema
Documentation Status: Standard