Understanding Human Reaction Time
Reaction time is the interval between the presentation of a stimulus (in this case, the screen turning green) and the initiation of the muscular response (clicking your mouse). In competitive gaming, sports, and even daily activities like driving, a faster reaction time can be a significant advantage.
The Hardware Bottleneck
While your biological reflexes are the primary factor, your computer hardware introduces a delay known as "system latency" or "input lag." This means the score you see above is actually your biological reaction time plus your system's latency.
System latency includes:
- Peripheral Latency: The time it takes for your mouse click to register and be sent to the PC.
- PC Processing: The time your CPU and OS take to process the input and tell the GPU to render a new frame.
- Display Latency: The time it takes for your monitor to actually draw the new pixels.
How Refresh Rate (Hz) Improves Reaction Time
Upgrading your monitor is one of the easiest ways to artificially lower your reaction time. A standard 60Hz monitor refreshes its image every 16.67 milliseconds. A 240Hz esports monitor refreshes every 4.16 milliseconds. This means the visual cue (the screen turning green) is physically displayed to your eyes up to 12 milliseconds faster on a 240Hz screen.
While 12ms might sound small, in games like CS:GO or Valorant, it can be the difference between winning and losing a duel. You can check if your monitor is running at its maximum capability using our Refresh Rate Test.
Tips to Improve Your Score
- Use a Wired Mouse: Wireless mice (unless they are high-end gaming models) can introduce slight delays.
- Turn off VSync: VSync prevents screen tearing but adds significant input lag. Check our Screen Tearing Test to learn more about sync technologies.
- Stay Rested: Fatigue significantly impairs biological reaction times.