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

https://rock-paper-scissors-c-z-m-z3-869.sagecurrent.com/posts/the-reason-why-everyone-is-talking-about-rock-paper-scissors-right-now

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