Yes / 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.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/16659 |
| Date | 01 November 2018 |
| Creators | Giesel, M., Wade, A.R., Bloj, Marina, Harris, J.M. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, published version paper |
| 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/). |
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