SoundaryStroop Test — Free Online Color-Word Interference Check
A short self-check of attention: how fast and accurately you respond when a color word and its ink color conflict. About 3 minutes, with an interference score in milliseconds you can track over time.
What's included
- Time
- ~3 min
- Price
- Free
FAQ
What exactly is the Stroop effect?
When the word "blue" is printed in red ink, the automatic habit of reading the word conflicts with the task of naming the ink color. Responses slow down and errors rise — that slowdown is the Stroop effect, first reported by J. R. Stroop in 1935.
How do I read the interference score in milliseconds?
It is the average reaction time on incongruent trials minus the average on congruent trials. A smaller value means you suppressed the automatic reading response well; a larger one means more interference. Read it together with accuracy — a fast but error-prone run is hard to interpret.
Does a poor score mean ADHD or cognitive decline?
No. This is a self-check, not a diagnostic tool. Sleep loss, fatigue, caffeine, screen size and input lag can all shift the score noticeably. If attention problems keep disrupting daily life, talk to a clinician based on your actual symptoms rather than on this score.
How often should I take it, and how should I use the result?
Every one to two weeks is reasonable; testing too often produces practice effects that flatter your score. A trend measured at a similar time of day on the same device is far more useful than one session, especially when read alongside changes in sleep and stress.
Source
This task is based on the paradigm from: Stroop, J. R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18(6), 643–662. This task is a Soundary implementation based on a published academic paradigm. It is not any commercial test product or its test form.
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This is a self-screening tool, not a medical diagnosis. If the result concerns you, please consult a mental health professional.