perception

Right-handers: right arm is longer than left. Left-handers: arms are equal length.


Volunteers were brought to the lab and estimated their perceived arm length and how far they could reach with their arms… Left-handed volunteers judged both of their arms to be the same length, but right-handed participants underestimated the length of their left arm—they consistently perceived their right arms as being longer. In addition, right-handed volunteers thought their right hands were larger than their left, when in fact, they were both the same size. When guessing how far they could reach with their arms, left-handed volunteers estimated they could reach equally far with both arms while right-handed volunteers predicted they could reach farther with their right arm.

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