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

https://rock-paper-scissors-gambling-d-y-h-v1-651.unionquill.com/posts/what-is-rock-paper-scissors-and-why-are-we-talking-about-it

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