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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/1010

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Title: Interocular orientation disparity and the stereoscopic perception of slanted surfaces
Authors: Heeley, D. W.
Scott-Brown, Kenneth C.
Reid, G.
Maitland, F.
Affiliation: University of Abertay Dundee. School of Social & Health Sciences
Keywords: Perception
Issue Date: 2003
Publisher: Brill Academic Publishers
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Brill Academic Publishers, available from http://dx.doi.org/10.1163/15685680360511663
Citation: Heeley, D.W., et al. 2003. Interocular orientation disparity and the stereoscopic perception of slanted surfaces. Spatial Vision. 16(2): pp.183-207. Available from http://dx.doi.org/10.1163/15685680360511663
Abstract: The orientation threshold for two-dimensional filtered noise stimuli was estimated using forced-choice procedures with both dioptic and dichoptic viewing. In the dioptic case the two patterns were co-rotated. In the dichoptic case the stimuli were counter-rotated to produce an orientation disparity, which yields a percept of slant about the horizontal axis orthogonal to the cyclopean line of sight. Dioptic thresholds increased with the orientation bandwidth of the stimuli. In contrast, dichoptic thresholds were essentially constant across a wide range of conditions. In all cases, dichoptic orientation acuity was much finer than conventional estimates. In a second experiment, the dichoptic threshold was estimated for patterns superimposed on a depth pedestal. Acuity was affected significantly by the presence of the pedestal, and was an inverse function of pedestal amplitude. The results suggest that stereoscopic slant caused by dichoptic counter-rotation arises because of neural processing of the overall pattern of disparities of position produced by counter-rotation, rather than specialised encoding of orientation disparity.
URI: http://hdl.handle.net/10373/1010
ISSN: 0169-1015
Appears in Collections:Social & Health Sciences Collection

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