Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/32284
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Surface slant impairs disparity discontinuity discrimination
Author(s): Goutcher, Ross
Wilcox, Laurie M
Contact Email: ross.goutcher@stir.ac.uk
Keywords: Ophthalmology
Sensory Systems
Binocular vision
Stereoacuity
Absolute disparity
Relative disparity
Issue Date: Mar-2021
Date Deposited: 2-Feb-2021
Citation: Goutcher R & Wilcox LM (2021) Surface slant impairs disparity discontinuity discrimination. Vision Research, 180, pp. 37-50. https://doi.org/10.1016/j.visres.2020.12.001
Abstract: Binocular disparity signals are highly informative about the three-dimensional structure of visual scenes, including aiding the detection of depth discontinuities between surfaces. Here, we examine factors affecting sensitivity to such surface discontinuities. Participants were presented with random dot stereograms depicting two planar surfaces slanted in opposite directions and were asked to judge the sign of the depth discontinuity created where those surfaces met. Although the judgement was focussed on the adjacent edges, the precision of depth discontinuity discrimination depended upon the slant of the two surfaces: increasing surface slants to ±60° increased discontinuity discrimination thresholds by, on average, a factor of 5. Control experiments examining discontinuity discrimination across surfaces with identical slants showed either biases in discontinuity judgements or reduced threshold elevation. These results suggest that sensitivity to depth discontinuities is affected by processing limitations in both local absolute disparity measurement mechanisms and mechanisms selective for disparity differences. As further evidence in support of this conclusion, we show that our results are well-described by a model of discontinuity discrimination based on the encoding of local differences in relative disparity.
DOI Link: 10.1016/j.visres.2020.12.001
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: Goutcher R & Wilcox LM (2021) Surface slant impairs disparity discontinuity discrimination. Vision Research, 180, pp. 37-50. https://doi.org/10.1016/j.visres.2020.12.001 © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

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