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

https://rps-gambling-v-h-e-z4-863.keystonescope.com/posts/7-simple-tips-to-totally-rolling-with-your-rock-paper-scissors

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