Pattern Comparison (Sequential)
Description
A sequential pattern comparison task where participants memorize a dot pattern and then judge whether a second pattern is the same or different.
Measures: Visual short-term memory, pattern comparison, processing speed
Memory Processing Speed Perception
About This Test
A dot grid pattern is displayed briefly, then erased. After a delay, a second pattern appears and participants judge whether it is the same as or different from the first. Measures visual short-term memory and pattern discrimination.
Test Details
pattcomp-seqpattcomp-seq.pbl🚀 Try Without Registration
Run this test immediately without creating an account. Data stays in your browser.
Researcher Access Benefits
To save configurations, upload data, use translations, track completion, and manage studies, please log in or register for an account.
Scientific Background
Original Task References:
These references describe the original task that this PEBL implementation is based on.
- Perez, W. A., Masline, P. J., Ramsey, E. G., & Urban, K. E. (1987). Unified tri-services cognitive performance assessment battery: Review and methodology. DTIC/TR-87-007.
PEBL-Specific References:
These studies used the PEBL version of this task.
- Mueller, S. T. (2011). The PEBL Pattern Comparison Task. Computer software retrieved from http://pebl.sf.net/battery.html
Data Output
Trial-by-trial data with same/different condition, response, and accuracy.
patcompseq-{subnum}.csv
Data Columns
| Column Name | Description |
|---|---|
| subnum | Participant ID |
| trial | Trial number |
| samediff | Whether the second pattern was the same as or different from the first (same/diff) |
| delta | Number of dot position differences between patterns (0 for same trials; 1, 2, or 3 for different trials) |
| mat1 | First (study) pattern encoded as a binary string (1=dot present, 0=empty) |
| mat2 | Second (test) pattern encoded as a binary string |
| abstime | Absolute timestamp in milliseconds from the start of the test |
| rt | Response time in milliseconds from when the second pattern appeared |
| resp | Participant response (same or different) |
| corr | Whether the response was correct (1) or incorrect (0) |
About This Test
A sequential pattern comparison task where participants memorize a dot pattern and then judge whether a second pattern is the same or different.
Category: Processing Speed
Estimated Duration: 8 minutes
Available Translations: 7 languages
Documentation Status: Complete