What is MPRT in monitors and what does it do?
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MPRT stands for “Motion Picture Response Time”. Essentially it measures the shortest amount of time a pixel can stay on for. So if a pixel is black, and flashes white for a single frame, how long was the pixel actually on for.
If you have a 60fps monitor, the *minimum* possible MPRT will be 16.7 milliseconds (1/60th of a second), but the time it takes for the pixel to actually turn on and then turn off again will make the MPRT a little longer.
What this means is that a higher refresh rate will typically give you a lower MPRT, but there are other factors, such as the quality of the monitor.
There are other measures of the responsiveness of a monitor, such as latency and GtG (grey to grey), which taken together will let you know what to expect when watching a movie or playing a video game.
A high MPRT and GtG (both measures of the time it takes for a pixel to change colour) will mean that fast moving objects will appear blurry or fuzzy, even if the refresh rate is high.
If you’re shopping for a gaming monitor, focus on framerate and latency first, but if you have a decent budget, looking for a low GtG and MPRT might be useful.
For movies and graphic design, colour accuracy and contrast are typically more important.
Edit: the other comment is correct that some monitors include tricks to improve the perceived MPRT and GtG. For instance, if a pixel is supposed to go from 20% to 60% brightness, the monitor might send a 100% signal for a brief moment to make the pixel get to 60% quicker. This means that two monitors from different brands might use the same panel, but one of them might be more responsive because it includes this kind of trick.
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