Pulse · Reaction Time Test
When you press start, a panel turns red — hold steady. The instant it flips to green, tap, click or hit the spacebar. We measure the gap in milliseconds and average five rounds, discarding any false starts, for a stable score.
How to play Pulse
When you press start, a panel turns red — hold steady. The instant it flips to green, tap, click or hit the spacebar. We measure the gap in milliseconds and average five rounds, discarding any false starts, for a stable score.
What it measures
Pulse is a classic simple visual reaction-time test. It captures how quickly your visual system detects a change and your motor system acts on it — a clean measure of processing speed, the foundation under almost every other cognitive skill.
Honest note: Reaction time is affected by sleep, caffeine, your screen's refresh rate and even your mouse. Treat your number as a personal benchmark to beat, not a verdict on intelligence.
What's a good score?
Most adults land between 200ms and 300ms; around 250ms is typical and consistently under 200ms is fast. The percentile we show is an estimate based on typical distributions, not a clinical norm.
FAQ
Why did my round reset?
You tapped while the panel was still red — a false start. We reset that round so anticipation can't inflate your score.
Does my hardware matter?
Slightly. High-latency screens and wireless mice add a few milliseconds. Use the same setup each time for a fair comparison.
Keep training
Pulse measures simple reaction time — how quickly your brain turns “I see it” into “I moved.” Processing speed is one of the few areas where training has shown durable, real-world signal: in the large ACTIVE trial, older adults who practised speed-based tasks showed lower dementia risk a decade or two later. For everyone else it’s a clean, honest baseline to beat.
Who benefits most — no medical claims, just where the research points
Of all the brain-training evidence, speed-of-processing work is the most encouraging in this group — we make no promise, but it’s a genuinely interesting finding.
Reaction speed is trainable: across athlete studies, perceptual-reaction drills improved response times by roughly 5–27%.
Reaction time is a sensitive readout of sleep, caffeine and focus — a fun way to see how ‘switched on’ you are today.