Prueba de tiempo de reacción — Mide tu reacción visual
Haz clic cuando la pantalla pase de rojo a verde. Cinco intentos dan un promedio estable. Normal 220–270 ms, pros 150–180 ms.
Haz clic para comenzar
Haz clic para empezar
Último
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Promedio
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Mejor
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Calificación
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Historial de la sesión
Completa intentos para ver los tiempos aquí
What is Reaction Time?
Reaction time is the elapsed time between a sensory stimulus and a deliberate motor response. In this test, the stimulus is the screen turning green and the response is your click. The number you see is the sum of three components: signal travel from retina to visual cortex (~50 ms), cognitive recognition that the color changed (~80–120 ms), and motor command from cortex to finger (~30–60 ms).
Because the cognitive step dominates, reaction time is a sensitive indicator of attention and central nervous system state. Sleep deprivation, alcohol, and high cognitive load all slow it noticeably, while caffeine and short bouts of physical activity speed it up by 5–15 ms.
How the Test Works
The test schedules a random delay between 1.5 and 5 seconds after you click Start. When the timer fires, the screen background switches from red to green and we capture performance.now() at that moment as the 'ready time'. Your click captures performance.now() again, and the difference is your reaction time for that trial.
Clicking before green counts as a false start (anticipation rather than reaction) and resets the trial. Five clean trials make a session; the average is your headline number. Your single best trial is also tracked separately and persisted in localStorage so you can chase a personal best across visits.
What Affects Reaction Time
Age: Reaction speed peaks around age 24 and slows gradually after — about 1 ms per year on average, but actively trained brains decline much more slowly.
Sleep: A single night of 4 hours of sleep adds 30–50 ms. Chronic sleep debt is even worse and accumulates.
Caffeine: 100–200 mg (one cup of coffee) shaves 5–15 ms off reaction time for 3–5 hours.
Hardware: A high-refresh display + low-latency wired mouse can shave 20–50 ms off the displayed value vs. a 60 Hz screen with a budget wireless mouse.
Anticipation: If the test becomes predictable, your brain pre-fires and times look unrealistically fast (often under 100 ms with too-early errors). The randomized delay in this test prevents that.
How to Improve
Sleep 7–8 hours consistently. This is the single largest controllable factor.
Warm up: 30 seconds of finger flexion and visual scanning before the first real trial primes the nervous system.
Train regularly: 5–10 minutes daily produces a measurable improvement over 4–8 weeks. Diminishing returns set in past 15 minutes per session.
Upgrade hardware: a 144 Hz+ monitor and a 1000 Hz wired mouse are the structural caps. Past those, biology dominates.
Maintain focus: noisy environments and multitasking add 30+ ms. A quiet room, full-screen window, and pre-test breathing all help.
Preguntas frecuentes
Visual reaction times under 200 ms are excellent, 200–250 ms is normal, and over 300 ms is on the slow side. Professional FPS / fighting game players typically average 150–180 ms. The fastest documented human visual reaction times are around 100–120 ms.
Reaction time is a noisy biological signal. Attention, fatigue, anticipation, and ambient noise all shift it by 20–50 ms. Five trials give a reasonable average; ten or more give a stable estimate. Throw out 'too early' attempts — they don't reflect real reflex.
Yes. A 60 Hz monitor adds up to 16.7 ms of display latency; 144 Hz adds 6.9 ms. A wireless mouse adds 1–10 ms. Browser dispatch adds another 1–4 ms. Your nervous system itself is the dominant cost (~150–200 ms), so hardware accounts for less than 15% of the total — but it can mean the difference between 'pro' and 'good'.
Yes, but only modestly — research shows trained gamers gain about 20–40 ms over untrained controls. The bigger win is consistency: pros aren't necessarily faster on their best click, they're more consistent across trials. Sleep, hydration, and pre-test warm-up matter as much as practice.
Touchscreens add 50–100 ms of input latency on top of the 1–4 ms a desktop mouse adds. Mobile reaction-time scores are not directly comparable to desktop scores.