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

https://rps-gambling-m-v-u-w4-018.silverstonebrief.com/posts/10-tell-tale-warning-signs-you-need-to-look-for-a-new-rps-gambling

Some players use Rock Paper Scissors to check timing and psychology-- do you go initially, mirror relocations, or all of a sudden switch methods to confuse them?