A team of social scientists in China say they have identified a few simple strategies to increase your odds at winning a game of rock-paper-scissors, and it seemed only fair to share them here. After watching 360 students each play 300 rounds of the game, the researchers observed the following: First, winners tend to repeat their strategy. If the students won once by playing scissors, they tended to try it again in the next round. Second, losers tend to change their strategy — and this is the finding you can use to your advantage, as a new video from the nonprofit Mathematical Sciences Research Institute explains. Watch the video to learn how to manipulate human psychology for your own personal rock-paper-scissors gain.