Study reveals a way to improve chances of winning at rock-paper-scissors

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The Rock-Paper-Scissors game. (A) Each matrix entry specifies the row action’s payoff. (B) Non-transitive dominance relations (R beats S, P beats R, S beats P) among the three actions. (C) The social state plane for a population of size N = 6. Each filled circle denotes a social state (nR, nP , nS); the star marks the centroid c0; the arrows indicate three social state transitions at game rounds t = 1, 2, 3. Credit: arXiv:1404.5199 [physics.soc-ph] A trio of researchers at Zhejiang University in China has found a way for players to improve their odds of winning when playing the hand game rock-paper-scissors. In their paper they’ve uploaded to the preprint server arXiv, the researchers describe a field study they undertook with a large crowd of volunteers and how it revealed the secret. Scientists in many fields have studied game theory for thousands of years, some to gain military or social advantage, others to better understand human psychology. Onegame stands out, the hand game rock-paper-scissors, likely because of its simplicity, and because it can be used to make group decisions. Plus, it’s universal, requiring nolanguage skills or preconceived social notions—therein lies its inherent beauty. Also, it’s supposed to be fair, with every player having a

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