Choice Reaction - Free Online Benchmark & Cognitive Training Tool
What is the Choice Reaction & How Does It Measure Performance?
About Choice Reaction Time
Choice RT measures how quickly you select the correct option among multiple alternatives after a stimulus appears—closer to multi-button real life than simple one-button RT.
Task Flow
Several boxes wait. After a random delay, one lights. Click only that box. Early clicks and wrong boxes are errors.
Why Random Delays
Random foreperiods stop pure anticipation so you measure decision-plus-motor latency, not prediction.
Difficulty
Beginner uses fewer choices; harder modes add boxes, tighten timing, and may show decoy highlights on Professional.
Score Meaning
Average RT in ms on correct hits—lower is better. Best RT stores your best average for that difficulty.
Training Tip
Hover readiness without twitching. Choice errors explode when you guess early.
Hick's Law Intuition
More alternatives generally slow choice RT. That is why 4-box averages should not be compared naively to 2-box averages. Log difficulty beside every personal best.
Information Before Motion
The winning pattern is perceive → select → move. Starting the mouse motion before the light appears creates early-click faults and messy averages.
Hardware Notes
Display refresh and input lag add milliseconds. Keep the same monitor and mouse when tracking progress over weeks.
Step-by-Step Instructions & How to Play
Start
- Pick difficulty.
- Initialize.
- Eyes on the full set of boxes.
Respond
- Wait for a true light.
- Click only the lit target.
- Never click during the wait phase.
Pro Mode
- Ignore faint decoy colors.
- Only the bright target counts.
Tips to Improve Your Score
Hands Ready
Keep the pointer near the grid without pressing.
Suppress Anticipation
If you feel a countdown in your head, reset—waits are random.
Decoy Discipline
On Professional, dim lights are traps.
Compare Like-for-Like
Only compare averages within the same number of choices.
Frequently Asked Questions About Choice Reaction
Is lower better?
Yes—average RT in milliseconds.
What is Best RT?
Your best (lowest) average for that difficulty.
What is an error?
Clicking early or clicking the wrong box.
Do errors enter the average?
Usually only correct hits contribute RT samples.
Attempts per run?
About 8 on Beginner up to ~20 on Professional.
Box counts?
2 on Beginner/Easy, 3 on Normal, 4 on Hard/Pro.
Keyboard?
This mode is primarily click/tap on boxes.
Why random waits?
To block anticipation cheating.
New Record meaning?
Your average beat the stored best (or first score).
What are decoys?
Faint non-target lights on Professional.