Author
ADR
ADR is a PUBG player who built ReactionTestTime while trying to react faster in close-range fights. ADR writes and reviews every guide and test on the site and checks each claim against published research. Read about the methodology behind the tests.
- WritesGuides and test pages
- DesignsTest timing and rules
- ReviewsSources and data
Why I built ReactionTestTime
I'm ADR, a gamer, and most of my time goes into PUBG. In PUBG, close-range fights are often decided in a split second: whoever spots the enemy and fires first usually wins. I kept losing those fights, and it wasn't always my aim. I was reacting too late.
So I started looking for ways to train my reflexes. Most reaction time tests I found online were cluttered with ads, gave a single number with no explanation, or didn't say how they measured anything. I wanted something simple: a clean test, an honest result in milliseconds, and clear advice on what actually helps.
That's why I built ReactionTestTime. It has the tests I use myself: the classic reaction time test, the aim test for mouse control, the reflex test and the F1 start lights test. They come with guides that explain what affects reaction time, from sleep and caffeine to mouse latency and practice. Every guide is based on published research, and the sources are listed on each page.
The routine I recommend is simple. Warm up with a few rounds before playing, track your average instead of chasing one lucky score, and make sure you're rested before long sessions. Reaction time can only improve so much, but being consistent, warmed up and well rested makes a real difference in a fight. My guide on how to improve your aim goes into more detail.
Editorial standards
- Every guide lists the published research it relies on in its Sources section.
- Numbers from ReactionTestTime's own tests are labelled as such and shown only once there is enough data.
- The tests and guides are for information and entertainment, not medical or diagnostic use.
- Spotted a mistake? Please report it through the contact page and it will be reviewed and corrected.
Guides by ADR
All guides- Reaction Time vs Response Time: What's the Difference?Reaction time is how long it takes to start responding to a signal. Response time is the whole thing: reaction time plus the movement that follows. Here's the difference, with examples from tests, driving and gaming.
- What Is the Fastest Human Reaction Time?There's no official world record for reaction time, but research and sprint starts show where the human limit is. Sprinters can sometimes react to the gun in under 100 ms, while most people average around 200 ms or more.
- F1 Driver Reaction Time: How Fast Do Drivers React at the Start?Formula 1 drivers launch their cars about 0.2 seconds after the start lights go out, on average. Here's what that number includes, how drivers train for the start, and how your own time compares.
- How to Improve Your Aim: A Practical Guide for FPS PlayersBetter aim comes from consistent settings, good crosshair placement, short focused practice and enough sleep. Here's a practical routine for FPS games like PUBG, and how to measure your progress honestly.
- Reaction Time Training: Drills, Routines and What Actually WorksTraining won't rewrite your nervous system, but structured practice makes you more consistent, better at anticipating, and faster at the decisions that matter. Here's how to train, and how to measure it honestly.
- Factors Affecting Reaction Time: 10 Things That Speed You Up or Slow You DownYour reaction time isn't a fixed number. It shifts with the kind of signal, the decision involved, your age, sleep, attention, caffeine and even your mouse. Here are the factors that matter most.
- Reaction Time and Sleep: How Sleep Loss Slows You DownSleep loss is one of the most reliable ways to slow your reactions. It doesn't just raise your average. It causes lapses, moments where you respond far slower than usual.
- Caffeine and Reaction Time: Does Coffee Make You Faster?Research generally finds moderate caffeine improves alertness and reaction time, especially when you're tired. The catch: too much, or too late in the day, can backfire by wrecking your sleep.
- What Is Reaction Time? A Clear ExplanationReaction time is the delay between something happening and you responding to it. Here's what that delay is made of, the main types, and how it's measured.
- What Is a Good Reaction Time?On a typical online test most people average somewhere between 200 and 300 ms. Here's how to interpret your result, and why your setup matters as much as your reflexes.
- How to Improve Your Reaction TimeYou can't rewire your nervous system overnight, but sleep, smart practice, focus and a lower-latency setup can make your reactions faster and, just as importantly, more consistent.
- Reaction Time for Gaming: What Matters and How to Get FasterIn fast games, a few tens of milliseconds can decide a duel. But raw reflexes are only one part of in-game reaction time. Your system latency and decision-making matter too.
- Visual vs Auditory Reaction Time: Which Is Faster?Most studies find people react faster to a sound than to a light. Here's why, and how to test the difference on yourself.
- Mouse Latency and Reaction Time: How Hardware Changes Your ScoreEvery online reaction time result includes your hardware. Here's where that latency comes from (mouse, keyboard, display and browser) and how to minimise it.