How can I measure someone's ability for the speed to which they react to something? Is their a way to test something like a person's reaction timing that doesn't involve something as simple as the ruler test, but rather something a bit more complex.
Edited: The ruler test: https://www.youtube.com/watch?v=yn6WRm6TiPk I have not yet done initial research on this topic because I want some good opinions on sources that I can use to better my understanding of this topic. I apologize if I was not clear at first.