Name the ink color, ignore the word.
The Stroop task measures how well you suppress an automatic response. A color word appears in a conflicting ink color; your job is to answer with the ink, not what the word says.
Play Stroop TestFrom level 1 to the final stop. Percentages come from real HumanCalc players.
Easy10–20
Medium30–40
Hard50–100
1A color word appears in conflicting ink.
2Answer with the ink color.
12 correct
3Stay accurate while the timer gets tighter.
A color word appears in red, blue, green or yellow ink.
Choose the ink color even when the written word names a different color.
Use the buttons or keys 1–4. Five consecutive correct answers shorten the response window; two misses ease the pace.
Cut the delay between seeing and acting. Incongruent color words slow responses because reading competes with naming the ink color.
These sources describe related tasks or concepts. HumanCalc adapts them for browser practice; a game score is not a clinical result.
A new season every week. The overall top three earn a medal and bonus XP. How scores work. Scores here show as 5 correct.
Leaderboard
It measures selective attention and inhibitory control: the ability to suppress a strong automatic response.
Reading is highly automatic, so your brain must inhibit the word meaning before naming the ink color.
Yes. Your score is the number of correct responses in a 45-second run.
How to play · 3 min read
In the Stroop test you name the ink color of a color word. A worked example, why RED in blue ink is slow to name, and the scores 34 HumanCalc players reached.
Read guideResearch & scores · 3 min read
Understand HumanCalc's five-round reaction time average, early-tap penalty and why device and input settings matter when comparing attempts.
Read guide
