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

https://rock-paper-scissors-k-q-v-l2-432.cloudhinter.com/posts/ten-things-everybody-is-uncertain-about-the-word-rps-gambling

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