Response Time vs. Latency / Input Lag

"Response Time" is not a measure of latency / input lag / delay.

Latency / delay is not typically listed in the specs of a monitor. To find the latency of a monitor you will need to read detailed reviews, from sources such as:

Many people have a distorted impression of how long a millisecond is, because they "feel lag" on their 5 ms response time monitor, and they think that the amount of lag they feel is how long 5 ms is, when they are really feeling 50–100 ms of latency, which isn't listed in the specs. Please see this website for some perspective on how much time a millisecond is:

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Equipment used:

Camera: Casio Exilim EX-ZR100
Keypress generator / LED indicator: Makey Makey
Keypress detection software: KeyScan v0.9 by Digital Genesis
Monitor: Dell UltraSharp UP2516D (IPS, 6 ms advertised)

Note that the latency recorded in the video is the entire latency chain from keypress to display, not the latency of the monitor alone. This is not a measurement of the latency of the monitor, it is a demonstration of the difference between latency/input lag and the monitor response time spec. The latency of this monitor is actually remarkably low, as 45 ms is very fast for a full keypress-to-pixels delay with the Makey Makey, which has more latency than a typical mouse or keyboard.

Video was shot at 1,000 fps (1 frame = 1 ms) at 224×64 resolution (it's a $100 camera that shoots 1,000 fps, what more can you expect :P)

Raw footage:

[EonsHD]

This is honestly the clearest explanation on this I’ve ever seen, lol. Too bad displays don’t advertise their input lag.

[beefmaster]

That's the best explanation ever. I have been searching for two days. But this means that response time should be added to 1/refresh rate to get a sum value which is perceived by the eye right? In other words 60 hz 1ms monitor is better than 60 hz 16ms monitor, right?

[Tomohiko_JPN_]

Noobie Question: Within Analog Circuit (a button + a LED),
How much They would be ?
Like 3ms + 1ms ??