Stroop test
BLUE in red ink? Tap the colour of the ink – not the word. The classic shows how hard it is to hold back an automatic reaction. ← All concentration exercises
How it works
Pick a level
Easy: word and colour mostly match or XXXX. Medium: mostly not. Hard: never – and for underlined words the word counts.
Tap the colour
Tap one of the four colours or press 1 to 4. At the end you see time, errors and the Stroop effect in milliseconds.
Colour charts to read out loud, with solution. You need a colour printer for them.
Frequently asked questions
What is the Stroop effect?+
Reading is so automatic that the word gets in the way when you should only name the ink colour. The effect is named after John Ridley Stroop, who described it in 1935. Comparing matching and mismatching words shows how many milliseconds the interference costs.
What does my result mean?+
The Stroop effect is the time difference between mismatching and matching words (level Medium). For most people it is clearly noticeable – a small value shows that you can focus on the colour well. Compare yourself with yourself above all.
Can I do the test with colour blindness?+
With red-green colour blindness red and green are hard to tell apart – then the exercise makes little sense, sadly. The colours are strong, but they do not replace an adapted test.
How do the worksheets work?+
The sheet holds colour words in colour (Easy: colour fields only). You say the ink colour out loud, row by row, and time yourself. The solution sheet lists the right colours per row – handy in a group or class.
Is this a medical test?+
No. The Stroop test is used in research and diagnostics in a standardised form; this version is an exercise without norm values.
The exercises are for practice and fun. They do not replace a diagnosis or therapy.