Stroop test online
Choose the ink color while ignoring the color word.
Example
Example
An example to explore. No score or practice round is recorded.
16 words · 2.4s each · 3 colors
Half the words match their ink. Half do not.
- Words answered
- 0 / 16
- Active time
- 0:00
Choose the color, not the word.
A color word appears in the middle. Choose the color of the ink, not the word you read. Each word has a short time limit, so answer as quickly as you can without guessing.
Explore the method
Choose the color of the letters, even when the word names another color.
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is usedHelp
A color word appears. Answer with the color it is printed in. If the word RED is printed in blue, the answer is blue.
Half the words match the color of their ink and half conflict with it. Both halves ask for each answer color equally often, so their response times can be compared.
Each word has a time limit. A word you do not answer in time counts as missed and is excluded from the timing comparison.
Use number keys 1 to 4, or Tab and Enter, to answer. The buttons stay in the same order for the whole round.
The interference gap is the average response time for conflicting words minus the average for matching words. It comes from two small samples, so treat differences of a few tens of milliseconds as noise.
This task depends on fluent, automatic reading. Use the language you read most naturally. Results from different languages are kept separate.
This timed task relies on seeing both the word and its ink color. There is no equivalent audio version.
This task requires distinguishing four ink colors. The inks differ in lightness as well as hue, but red, green and yellow may still look similar with a red-green color-vision deficiency. If the colors look alike to you, this score will not reflect what you can do.
About this practice
Choose the ink color, not the word itself. The result compares matching and conflicting words to show the Stroop interference gap.
A color word appears, printed in colored ink. You choose the color of the ink, not the word. If the word RED is printed in blue, the answer is blue. Half the words match their ink and half do not, and both halves ask for each answer color equally often.
What it measures, and what it does not
It shows how much a word you cannot help reading slows you down when it disagrees with the ink. The extra time on conflicting words is called interference. The task depends on reading the words fluently, so use the language you read most easily. It describes this one task, not attention in daily life.
What each level changes
- Levels 1 to 3 use three ink colors. Levels 4 to 8 add a fourth.
- The round grows from 14 words at level 1 to 28 at level 8, two more a level.
- The time for each word falls from 2.6 seconds at level 1 to 1.2 seconds at level 8.
A word you do not answer in time counts as missed. The buttons keep the same order for the whole round, and keys 1 to 4 answer as well.
What your result means
You see how many words you got right, the average time for matching words and for conflicting words, and the gap between them with a margin. Only correct answers are timed, and each average needs at least 3 of them. An answer faster than 150 ms is too quick to be a read, so it counts as correct but is not timed.
Words that run out of time are left out of the timing, which can make the gap look smaller. Each average rests on half a round or less, so treat a difference of a few tens of milliseconds as noise, and compare rounds at the same level.
For what the gap means and where the task comes from, read the guide Stroop test: what the slowdown means. The lesson Name the ink shows the method.
Report a problem
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is used