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    Investigating human visual sensitivity to binocular motion-in-depth for anti- and de-correlated random-dot stimuli

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    Publication date
    2018-11
    Author
    Giesel, M.
    Wade, A.R.
    Bloj, Marina
    Harris, J.M.
    Keyword
    Motion-in-depth
    3D motion
    Binocular cues
    Disparity
    CD
    IOVD
    Anti-correlation
    De-correlation
    Rights
    © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
    Peer-Reviewed
    Yes
    
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    Abstract
    Motion-in-depth can be detected by using two different types of binocular cues: change of disparity (CD) and inter-ocular velocity differences (IOVD). To investigate the underlying detection mechanisms, stimuli can be constructed that isolate these cues or contain both (FULL cue). Two different methods to isolate the IOVD cue can be employed: anti-correlated (aIOVD) and de-correlated (dIOVD) motion signals. While both types of stimuli have been used in studies investigating the perception of motion-in-depth, for the first time, we explore whether both stimuli isolate the same mechanism and how they differ in their relative efficacy. Here, we set out to directly compare aIOVD and dIOVD sensitivity by measuring motion coherence thresholds. In accordance with previous results by Czuba et al. (2010), we found that motion coherence thresholds were similar for aIOVD and FULL cue stimuli for most participants. Thresholds for dIOVD stimuli, however, differed consistently from thresholds for the two other cues, suggesting that aIOVD and dIOVD stimuli could be driving different visual mechanisms.
    URI
    http://hdl.handle.net/10454/16659
    Version
    published version paper
    Citation
    Giesel M, Wade AR, Bloj M et al (2018) Investigating human visual sensitivity to binocular motion-in-depth for anti- and de-correlated random-dot stimuli. Vision. 2(4): 41.
    Link to publisher’s version
    https://doi.org/10.3390/vision2040041
    Type
    Article
    Collections
    Life Sciences Publications

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