Stereoscopic depth constancy depends on the subject's task

Vision Research
A GlennersterM F Bradshaw

Abstract

Under identical viewing conditions, observers made two types of judgement about the shape of stereoscopically defined surfaces: one required an estimate of viewing distance for correct performance (e.g. setting the depth of a hemi-cylinder to equal its half-height or a dihedral angle to 90 deg), the other did not (matching the depth of, for example, sinusoidal corrugations or hemi-cylinders presented at two distances). Depth constancy for the two types of task was about 75% and 100%, respectively. We argue that observers may use a simple "direct" strategy to perform the depth matching task rather than constructing and comparing a metric representation of each surface.

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Citations

Dec 7, 2005·Experimental Brain Research·Eli Brenner, Jeroen B J Smeets
Jun 20, 2013·Biological cybernetics·Lyndsey C PickupAndrew Glennerster
May 23, 2003·Journal of Experimental Psychology. Human Perception and Performance·Simon J Watt, Mark F Bradshaw
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Jan 26, 2021·Royal Society Open Science·Giedre ZlatkuteDhanraj Vishwanath
Apr 21, 2021·PloS One·Alexander Muryy, Andrew Glennerster

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