4 ms·
I don't understand what you're proposing here. How can you measure 30-100 ms latencies with a stopwatch? My guess is that the standard deviation of human reac
by etrautmann 9y ago
I don't understand what you're proposing here. How can you measure 30-100 ms latencies with a stopwatch? My guess is that the standard deviation of human reaction time variability is at least 40 ms
- mrob 9y agoReaction time is irrelevant here, because you're anticipating a response to your input, not triggering the stopwatch in response to unexpected events. Human sensitivity to timing is much better. Great drummers can hit the beat to within a few milliseconds. If you've watched the movie "Whiplash", think of the "rushing or dragging" scene. See http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0127902 http://journals.plos.org/plosone/article?id=10.1371/journal....
- z3t4 9y agoFollowing a beat will give you very consistent times, but they can still be off! Try with a stop watch and try to stop it at exactly 10 seconds (you are free to look at the clock), you'll probably be 10-30ms off. Then try stopping it at an arbitrary time, but the same every time, and you will probably stop it at the exactly same time every time!
- tzs 9y agoSuppose the human is allowed to reject trials where they feel they botched the timing? Let's say the clock flashes an LED every second, and you are trying to press a mechanical button that will make an audible click on the 10th LED flash. To decide whether or not to accept a trial, the human has to judge whether or not the audible click and the flash of the LED were simultaneous. I have no idea how good we are at that, but I'd expect that we are better at that than at reacting to things. Even better would be to make the button also flash an LED, so that there is no error from differences between aural and visual processing speed and latency.
- z3t4 9y agoMy experience is that a skilled clocker can have 10ms precision if you take away the reaction times. Now a bad clocker we are talking 100-400ms off. Try for example stopping a stop-watch at exactly 10.00 seconds.
- VLM 9y agoI found an interesting paper on using a computer to test latency of professional skeet shooters. http://www.sciencedirect.com/science/article/pii/S0042698903002992 http://www.sciencedirect.com/science/article/pii/S0042698903... The most interesting thing I learned about was the three modes of Saccadic latency. I wonder if there are aspects of computer GUIs that work for or against the three modes. Or decades later in 2017 if the three mode idea is still current thinking in the field. The variation of Saccadic modes does exceed your prediction of 40 ms. I would assume it would be easier to test latency of FPS video game players rather than simulating skeet shooting using a FPS-like computer system. In fact that would be a novel scoring, ranking, or handicapping system for a FPS.
- imtringued 9y agoHow do timing side channel attacks work over a network with 100ms latency when you need nanosecond accuracy to execute them? By taking several million samples.