One attempt per challenge. Finish each stage in order to unlock the next.
Complete 32 scored rounds. Every round counts.
Latest run
Challenge complete
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Each ability contributes equally to the Arena score.
CRT · Speed
Start 32 scored rounds directly. Wait for the arrow, then press the matching side. Use the left / right buttons or arrow keys.
If you press before the arrow, that trial counts as incorrect and the next trial follows. If you do not respond before the time limit, the trial counts as a miss. Results stay on this device.
The main score is the median of your correct response times, measured withperformance.now(). Human Arena also shows accuracy, mean correct time, fastest and slowest valid responses, and the count of correct, incorrect, missed, and premature trials. Lower milliseconds are better.
Display refresh rate, input hardware, browser work, touch latency, attention, and fatigue can all shift a result. Treat the number as an entertainment and general-information measurement, not a medical, diagnostic, neurological, or IQ assessment.
Choice Reaction Time Test measures decision speed: how quickly you notice a signal and choose the correct response among alternatives. It is a narrow timing and selection task, not a measure of thinking speed, intelligence, or overall ability.
A mouse or keyboard usually gives the fastest, most consistent response because the signal travels a short wired path. Touchscreens add a small delay from finger contact and can vary with screen protector or stylus. Treat cross-device comparisons as approximate.
This is a game result, not an IQ score or diagnosis. Read the scoring methods and measurement limits.
Instead of one response, you choose the side that matches each arrow. It measures decision speed, not just simple reflex, because your brain has to pick the correct response.
There are 32 scored rounds. Every round counts toward this result.
Pressing before the arrow appears is 'too soon' and that trial counts as incorrect and the next trial follows. Not responding before the time limit is a 'miss' and counts as an omission in the scored block.
Only approximately. Screen refresh rate, input hardware, browser work, and touch latency can all shift the measured time.
Choose another skill to practise as a separate test.
Identify the stimulus, select the corresponding response, and consider speed together with errors.
Our two-arrow game uses balanced, randomly ordered choices. It does not estimate a Hick-law slope across different numbers of alternatives.
Correct-response median, accuracy, errors, omissions and early responses.
Research informs the task design. It does not validate this implementation, its game-point scales, or the five-ability profile. Read our methodology →