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

https://rps-gambling-q-p-l-i3-362.cavandoragh.org/how-do-you-explain-rock-paper-scissors-to-a-five-year-old

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