PEBL Hub — IRB Fact Sheet — 2026-08-23
Victoria Stroop Task
Category:Attention
Duration:~5 minutes
Parameters:4 configurable parameters available
Version:1.0
Input:Keyboard
Description
Classic Stroop color-word interference test using the Victoria format with three conditions: color naming, word reading, and color-word interference.
Participants complete three blocks in sequence: Part D (colored dots - name the color of dots), Part W (colored words - read the word), and Part C (color naming with incongruent color words - the classic Stroop interference condition where participants must name the ink color while ignoring the word meaning). Participants use keyboard keys to indicate their color responses. Incorrect responses are highlighted and participants must correct them before proceeding.
Key Parameters
| rounds | Number of times to go through all three forms (1-2-3). Each round contains color naming, word reading, and interference conditions. (default: 1) |
| numcolumns | Number of columns in the stimulus display grid. Standard Victoria format uses 6 columns. (default: 6) |
| numrows | Number of rows in the stimulus display grid. Standard Victoria format uses 4 rows. (default: 4) |
| timelimit | Time limit per trial in milliseconds. Set to 0 for no time limit (self-paced). (default: 0) |
Example Data Output (5 sample rows)
| subnum | test | round | block | trial | word | color | part | xpos | ypos | resp | rname | correct | intrusion | numresponses | time0 | timea | timeend | trialtime | responsetime |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | stroop-vic | 1 | 1 | 1 | 0 | blue | d | 261.2 | 132.857 | 1 | 藍 | 1 | 0 | 1 | 67817 | 67817 | 69462 | 1645 | 1645 |
| 1 | stroop-vic | 1 | 1 | 2 | 0 | red | d | 542.4 | 132.857 | 3 | 红 | 1 | 0 | 2 | 69469 | 69469 | 72953 | 3484 | 3484 |
| 1 | stroop-vic | 1 | 1 | 3 | 0 | yellow | d | 823.6 | 132.857 | 2 | 黄 | 1 | 0 | 3 | 72960 | 72960 | 75944 | 2984 | 2984 |
| 1 | stroop-vic | 1 | 1 | 4 | 0 | green | d | 1104.8 | 132.857 | 4 | 綠 | 1 | 0 | 4 | 75951 | 75951 | 77179 | 1228 | 1228 |
| 1 | stroop-vic | 1 | 1 | 5 | 0 | red | d | 261.2 | 185.714 | 3 | 红 | 1 | 0 | 5 | 77186 | 77186 | 78713 | 1527 | 1527 |
References
Troyer, A. K., Leach, L., & Strauss, E. (2006). Aging and Response Inhibition: Normative Data for the Victoria Stroop Test. Aging, Neuropsychology & Cognition, 13(1), 20–35. doi:10.1080/138255890968187