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Graph displays the average size estimate for each arm position. Generally, participants estimated the aperture to be smaller as their hands moved farther apart. Specifically, participants estimated the aperture to be significantly smaller when their hands were the widest part of their body (76.2 cm and 114.3 cm) than when their hands were not the widest part of their bodies (0 cm and 38.1 cm). Bars represent one standard error.
