PMID: 11922123Apr 2, 2002Paper

A planar and a volumetric test for stereoanomaly

Perception
Raymond van Ee, Whitman Richards

Abstract

Stereoanomaly is the failure to see differences in depth when the viewer is presented with stimuli having different magnitudes of stereoscopic disparity. In the absence of eye movements, everyone suffers from stereoanomaly for extremely large disparities. Typically, such disparities are seen at the same depth as monocular stimuli. However, about 30%, of the population exhibit some form of stereoanomaly even for very small disparities, provided eye movements are avoided. In some cases, the sign of the disparity will be confused, and the perceived depth will be incorrectly seen as 'behind' rather than 'in front of' the fixation point, for example. Because anomalies provide useful information about perceptual mechanisms, tests that measure and quantify the extent of a blindness are important investigative tools for research. Here we offer two easy-to-administer tests for stereoanomaly. The first test is based on depth judgments of two bars relative to a fixation point. The second test involves judgments of volumetric stimuli, seen stereoscopically. In each case, subjects indicate depth by setting a rectangle (with fixed base) to match the perceived depth. Although both tests are correlated, some differences in stereo processing ar...Continue Reading

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Citations

Feb 8, 2005·Proceedings. Biological Sciences·Raymond van EeSanne van der Ven
Jan 12, 2011·The Journal of the Acoustical Society of America·Hiromitsu MiyazonoBrian C J Moore
Apr 1, 2009·PloS One·Gijs Joost BrouwerRaymond van Ee
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May 5, 2009·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Whitman RichardsAndrea van Doorn
Jul 19, 2003·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Raymond van EePascal Mamassian
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May 17, 2005·Vision Research·Loes C J van Dam, Raymond van Ee
Jan 22, 2003·Vision Research·Raymond van Ee, Loes C J van Dam
Nov 29, 2005·Vision Research·Loes C J van Dam, Raymond van Ee
Apr 8, 2006·Vision Research·Kazuho FukudaKazumichi Matsumiya
Oct 6, 2004·Perception·Loes C J van Dam, Raymond van Ee
Nov 29, 2005·Perception·Elena Gheorghiu, Casper J Erkelens
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Sep 10, 2020·Perception·Laurens A M H KirkelsRichard J A van Wezel
Mar 20, 2019·Attention, Perception & Psychophysics·Lisa Valentina Eberhardt, Anke Huckauf

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