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Contact: David Orenstein
Brown University

Arm's Length: A Relative Measure

Caption: People judge depth most accurately at a distance that corresponds with their arm length (green triangle). Too close and they overestimate depth (yellow); too far leads and they underestimate (blue). If they perceive their arm to be longer, researchers found, the whole continuum shifts farther away.

Credit: Istituto Italiano di Tecnologia

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Related news release: At arm's length: The plasticity of depth judgment

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