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Materials Needed: 1,740 game stone paper scissors stock photos, 3D objects, vectors, and illustrations are available royalty-free. See game stone paper scissors stock video clips Visual representations of a hand making Rock, Paper and Scissors signs sourced from the internet were displayed at a visual angle of approximately 4.5° × 4.5° with participants sat approximately 57 cms away from the screen. All text was white and presented on black background. The presentation of stimuli was controlled by PsyScope (Cohen, MacWhinney, Flatt & Provost, 1993) and responses were recorded using a PsyScope Button Box. The PsyScope script is available upon request.
Zhou, H.-J. The rock-paper-scissors game. Contem Phys (2015). doi: 10.1080/00107514.2015.1026556 Most variants add nothing to the core mechanic Loertscher, S. Rock-Scissors-Paper and evolutionarily stable strategies. Econ Lett 118, 473–474 (2013).