Some gamers utilize Rock Paper Scissors to evaluate timing and psychology-- do you go first, mirror moves

https://rock-paper-scissors-gambling-game-d-z-f-x8-454.keystonescope.com/posts/10-top-facebook-pages-of-all-time-about-rock-paper-scissors

Some gamers use Rock Paper Scissors to evaluate timing and psychology-- do you go first, mirror moves, or all of a sudden switch techniques to confuse them?