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Test your cognitive control — name the color, not the word. Measure your Stroop Effect and reaction time in this classic psychology experiment.
About this tool
Test your cognitive control — name the color, not the word. Measure your Stroop Effect and reaction time in this classic psychology experiment.
Stroop Effect Test is a free psychology tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open Stroop Effect Test on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
A focused workspace for one-off content, data, or planning jobs — open it, use it, done.
Start with a rough input and iterate until the result matches exactly what you need.
Copy or download the output for your project, document, or daily workflow.
Yes — Stroop Effect Test is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. Stroop Effect Test runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Test your cognitive control — name the color, not the word. Measure your Stroop Effect and reaction time in this classic psychology experiment. It's built for quick, everyday psychology tasks with results you can copy or download straight away.
Yes — Stroop Effect Test works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.