Stroop Color-Word Test
A clinician-assigned cued color-and-word switching task with guided examples, practice, and 144 scored trials. The non-diagnostic report describes reaction time and accuracy patterns from this session.
What this test is
Welcome. The Stroop Color-Word Test measures how well you can set aside an automatic habit, reading a word, in order to name the color it is printed in. This ability, called inhibitory control, is a core part of attention and executive function.
How would you like to use it?
For yourself
Take it yourself and see your results as soon as you finish, and you can retake it whenever you like.
For researchers
Sign up as an Implicitify researcher to use the full suite of measures in your studies, or pay for each test you give. Research pricing is still being set, so we will confirm it with you when you get in touch.
Become a researcherFor clinicians
Open a clinician account to send this measure to your clients or patients through a secure link and review their scored results in one place.
Create a clinician accountAlready have an account? Go to your clinician dashboard.For educators
Use our measures in your courses to show students how psychological assessment works and to teach the principles of testing.
Request course accessHow the task works
Learn the response pairs
Eight guided examples require the correct response before moving on: D matches red or bad, F matches green or deep, J matches blue or poor, and K matches yellow or legal.
Follow the cue
Each trial shows COLOR or WORD as a cue. COLOR means respond to the ink; WORD means respond to the word’s learned pair. A 16-trial practice is never scored or saved.
Complete the scored trials
The stimulus remains until you respond. This app then inserts a short blank pacing interval before the next cue. The 144 scored trials include rest screens after trials 36, 72, and 108.
Common questions
How long does it take?
You complete 8 guided examples, 16 unscored practice trials, and 144 scored trials, with three brief rest screens.
Is it free?
The task is assigned through a clinician’s patient link; respondents do not purchase it separately. The report provides descriptive summaries of reaction time and accuracy across cue, stimulus, and switch conditions. These are session-specific research measures, not population norms or clinical scores.
How accurate is an online Stroop test?
Research on browser-based experiments describes how frame-synchronized stimulus presentation and hardware-stamped input events can support useful response-time measurement (for example, Bridges et al., 2020; Anwyl-Irvine et al., 2021). Device, browser, sleep, caffeine, and distraction can still affect a session, so results should be read descriptively.
Can I retake it?
Yes. Familiarity with the rules and response keys can change performance on a later attempt, so compare sessions cautiously and consider differences in device and testing conditions.
What's the difference between this and a clinical Stroop?
Clinical instruments are interpreted by qualified professionals as part of a broader evaluation. This clinician-assigned cued switching task provides descriptive research measures only. It is non-diagnostic and is not a substitute for clinical assessment.