Choice Reaction Time Test
Measure your decision-making speed. Multiple shapes appear — identify and click the correct target as fast as possible. Track your cognitive performance with charts and statistics.
About Choice Reaction Time
Choice reaction time (CRT) measures how quickly you can select the correct response when presented with multiple stimuli. Multiple colored shapes appear simultaneously — you must identify and click only the green circle while ignoring the distractors.
Unlike simple reaction time, CRT requires active decision-making. It is widely used in cognitive psychology research, sports science, and clinical assessment to measure processing speed, selective attention, and executive function. CRT is typically 100–200 ms slower than simple reaction time due to the added cognitive load of stimulus discrimination.
Ready to test your decision speed?
Multiple shapes will appear — click ONLY the green circle. Ignore the other shapes. You will have 5 attempts.
Choice Reaction Time Norms by Age
Choice reaction times are higher than simple reaction times due to the added decision-making step. These benchmarks are based on published cognitive research.
| Age Group | Average CRT | Rating |
|---|---|---|
| 15–24 | 340 ms | Fastest age group |
| 25–34 | 360 ms | Near-peak performance |
| 35–44 | 380 ms | Slight decline begins |
| 45–54 | 410 ms | Moderate decline |
| 55–64 | 440 ms | Noticeable slowing |
| 65+ | 490 ms | Significant decline |
How to Use the Choice Reaction Test
- 1Click Start — Begin a new session of 5 attempts.
- 2Wait for shapes — Multiple colored shapes appear after a random delay. Stay focused!
- 3Click the green circle only — Ignore red, orange, and blue squares. Clicking a wrong shape counts as an error.
- 4Complete 5 attempts — The fastest and slowest times are dropped; the trimmed average of the remaining 3 is your score.
- 5Track your progress — Save the session to view your performance chart and history.
Who Benefits from Choice Reaction Testing?
Gamers
Fast target selection is critical in competitive gaming. CRT training helps sharpen the split-second decisions needed to outperform opponents.
Drivers
Road hazards require both fast reaction and the right response. Choice reaction time is more representative of real driving demands than simple RT.
Medical Professionals
Clinicians and surgeons benefit from fast, accurate responses under pressure. CRT assessment can also help screen for cognitive impairment.
Researchers
CRT is a standard measure in cognitive psychology and neuroscience research, used to study attention, executive function, and aging.
Frequently Asked Questions
What is choice reaction time?
Choice reaction time (CRT) measures how quickly you can select the correct response when presented with multiple stimuli. Unlike simple reaction time, CRT requires a decision: you must identify the target and ignore distractors, making it a measure of both speed and decision-making accuracy.
How is the average calculated?
Each session consists of 5 attempts. The fastest and slowest correct reaction times are dropped, and the average of the remaining 3 values is calculated. This trimmed mean approach reduces the impact of outliers caused by accidental clicks or momentary distraction.
Why is choice reaction time slower than simple reaction time?
Choice reaction time is typically 100-200 ms slower than simple reaction time because your brain must process multiple stimuli and make a decision before initiating a response. This extra processing is known as Hick's law — reaction time increases logarithmically with the number of choices.
What counts as an error?
Clicking on a distractor shape (a colored square instead of the green circle) counts as an error. Errors are tracked per session but do not count as a valid attempt — you must click the correct green circle to record a reaction time for that attempt.
Is my data sent to a server?
No. All processing happens locally in your browser. Your reaction times are saved in localStorage and never leave your device.