Stroop Test
Stroop Test – Color-Word Interference
A 30-second color-word test that mirrors your focus and mental interference right now.
Stroop Test
The Stroop test is a classic 30-second attention challenge. Color words appear in mismatched ink — your job is to name the INK color, not read the word. How fast and accurately you do it is a real-time mirror of your mental focus right now.
This word reads “Red” but the ink is blue — so you'd tap Blue.
- Tap the color of the ink, ignore what the word says.
- Go as fast as you can while staying accurate.
- 20 rounds, about 30 seconds total.
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About the Stroop Test
The Stroop test measures cognitive interference — the extra effort your brain needs when a word's meaning conflicts with its ink color. Reaction time and accuracy reflect your attention, processing speed and mental flexibility in the moment, which shift with sleep, stress and emotional state.
- This is a self-awareness tool that reflects your current state, not a clinical or diagnostic test. Results vary with device, tiredness and mood. Color perception differences may affect scores. For concerns about attention, consult a qualified professional.
Talk through your results with AI
Want to go deeper than a score? Copy the prompt below into ChatGPT, Claude or another AI assistant to reflect on your results, ask follow-up questions and get practical next steps. AI can be a helpful thinking partner for self-reflection — but it is not a therapist. Please read the note below.
I just completed the Stroop Test – Color-Word Interference, a self-assessment questionnaire. I'd like to reflect on what my results might mean. Please act as a supportive, evidence-based wellbeing coach: first ask me 2–3 clarifying questions, then explain in plain language what my results could indicate, and suggest small, realistic steps I could try over the next two weeks. Be honest about the limits of a self-test, and tell me when it would be wise to talk to a qualified professional.
AI assistants can make mistakes and are not a substitute for professional diagnosis or care. If you are in crisis or thinking about harming yourself, please contact your local emergency services or a crisis hotline right away.
About this tool
What is Stroop Test?
An interactive color-word test that measures cognitive interference — how your brain handles a mismatch between a word and its ink color.
What is it for?
See your attention and mental flexibility in real time, and how sleep, stress and mood are affecting your focus.
How to read your result
A higher focus index means faster, more accurate responses with less interference.
This is a self-awareness tool reflecting your current state, not a clinical or diagnostic test. Results vary with device, tiredness and mood, and color-perception differences may affect scores.
Classification & Reference
| Index | State |
|---|---|
| 80–100 | Sharp & Clear |
| 60–79 | Mild Interference |
| 40–59 | Strained Focus |
| 0–39 | Scattered |
Frequently asked questions
What does the Stroop test measure?
It measures cognitive interference — the extra time and effort your brain needs when a word's meaning conflicts with its ink color (e.g. the word “Red” printed in blue). Your reaction time and accuracy reflect attention, processing speed and mental flexibility in the moment.
What is the Stroop effect?
The Stroop effect is the delay in naming an ink color when it doesn't match the written word. Reading is so automatic that it interferes with the color-naming task. It was first described by John Ridley Stroop in 1935.
Is a fast Stroop score good?
Faster and more accurate responses with a small interference cost indicate a focused, alert state. Slower responses and a larger gap between matched and mismatched trials often reflect tiredness, stress or overstimulation rather than a fixed ability.
What is the emotional Stroop test?
The emotional Stroop is a variant where emotionally charged words replace color words; slower responses to those words can reflect where a person's attention is drawn. This tool uses the classic color-word version to gauge your current focus.
Can the Stroop test diagnose ADHD?
No. The Stroop test is a research and self-awareness measure of attention and interference, not a diagnostic instrument. If attention problems affect your daily life, consult a qualified professional.
Can I use ChatGPT or Claude to understand my results?
Yes. AI assistants like ChatGPT and Claude can be a useful way to reflect on what your results mean and explore next steps, and this tool gives you a ready-made prompt plus a one-click link to start that conversation. Keep in mind that AI is not a licensed professional and cannot diagnose you — for a formal assessment, or if you are struggling, please consult a qualified health professional.