Some players use Rock Paper Scissors to check timing and psychology-- do you go first, mirror moves

https://rock-paper-scissors-gambling-game-u-e-j-t7-115.rivetgarden.com/posts/5-reasons-to-be-an-online-rock-paper-scissors-and-5-reasons-you-shouldn-t

Some players use Rock Paper Scissors to check timing and psychology-- do you go first, mirror moves, or suddenly switch methods to confuse them?