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

https://rock-paper-scissors-z-y-t-w5-734.pinehavenscope.com/posts/10-things-everyone-makes-up-concerning-rock-paper-scissors

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