[infinite8s]

Typical human response time to a stimulus is about 200ms. That of course doesn't factor in the decision time, but once the brain decides on an action it takes about 200 Ms for the signal to propagate to the relevant muscles.

[mortehu]

https://www.humanbenchmark.com/tests/reactiontime seems to agree with you. The median there is 215ms, which probably includes some unmeasurable rendering and input latency.

In Jeopardy, though, people can anticipate the moment the buzzer becomes active.

[cjbprime]

How about exceptional human response time, as for pro gamers or Jeopardy players who have predicted the stimulus?