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

https://rock-paper-scissors-v-a-k-l9-684.clarionvale.com/posts/the-3-greatest-moments-in-rock-paper-scissors-history

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