Binocular summation of second-order global motion signals in human vision
Although many studies have examined the principles governing first-order global motion perception, the mechanisms that mediate second-order global motion perception remain unresolved. This study investigated the existence, nature and extent of the binocular advantage for encoding second-order (contr...
| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier
2013
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| Online Access: | https://eprints.nottingham.ac.uk/27748/ |
| _version_ | 1848793428900446208 |
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| author | Hutchinson, Claire V. Ledgeway, Tim Allen, Harriet A. Long, Mike D. Arena, Amanda |
| author_facet | Hutchinson, Claire V. Ledgeway, Tim Allen, Harriet A. Long, Mike D. Arena, Amanda |
| author_sort | Hutchinson, Claire V. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Although many studies have examined the principles governing first-order global motion perception, the mechanisms that mediate second-order global motion perception remain unresolved. This study investigated the existence, nature and extent of the binocular advantage for encoding second-order (contrast-defined) global motion. Motion coherence thresholds (79.4 % correct) were assessed for determining the direction of radial, rotational and translational second-order motion trajectories as a function of local element modulation depth (contrast) under monocular and binocular viewing conditions. We found a binocular advantage for second-order global motion processing for all motion types. This advantage was mainly one of enhanced modulation sensitivity, rather than of motion-integration. However, compared to findings for first-order motion where the binocular advantage was in the region of a factor of around 1.7 [Hess et al., 2007, Vision Research 47, 1682-1692 & the present study], the binocular advantage for second-order global 2 motion was marginal, being in the region of around 1.2. This weak enhancement in sensitivity with binocular viewing is considerably less than would be predicted by conventional models of either probability summation or neural summation. |
| first_indexed | 2025-11-14T19:00:09Z |
| format | Article |
| id | nottingham-27748 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:00:09Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-277482020-05-04T20:20:26Z https://eprints.nottingham.ac.uk/27748/ Binocular summation of second-order global motion signals in human vision Hutchinson, Claire V. Ledgeway, Tim Allen, Harriet A. Long, Mike D. Arena, Amanda Although many studies have examined the principles governing first-order global motion perception, the mechanisms that mediate second-order global motion perception remain unresolved. This study investigated the existence, nature and extent of the binocular advantage for encoding second-order (contrast-defined) global motion. Motion coherence thresholds (79.4 % correct) were assessed for determining the direction of radial, rotational and translational second-order motion trajectories as a function of local element modulation depth (contrast) under monocular and binocular viewing conditions. We found a binocular advantage for second-order global motion processing for all motion types. This advantage was mainly one of enhanced modulation sensitivity, rather than of motion-integration. However, compared to findings for first-order motion where the binocular advantage was in the region of a factor of around 1.7 [Hess et al., 2007, Vision Research 47, 1682-1692 & the present study], the binocular advantage for second-order global 2 motion was marginal, being in the region of around 1.2. This weak enhancement in sensitivity with binocular viewing is considerably less than would be predicted by conventional models of either probability summation or neural summation. Elsevier 2013 Article PeerReviewed Hutchinson, Claire V., Ledgeway, Tim, Allen, Harriet A., Long, Mike D. and Arena, Amanda (2013) Binocular summation of second-order global motion signals in human vision. Vision Research, 84 . pp. 16-25. ISSN 0042-6989 http://www.sciencedirect.com/science/article/pii/S0042698913000679 doi:10.1016/j.visres.2013.03.004 doi:10.1016/j.visres.2013.03.004 |
| spellingShingle | Hutchinson, Claire V. Ledgeway, Tim Allen, Harriet A. Long, Mike D. Arena, Amanda Binocular summation of second-order global motion signals in human vision |
| title | Binocular summation of second-order global motion signals in human vision |
| title_full | Binocular summation of second-order global motion signals in human vision |
| title_fullStr | Binocular summation of second-order global motion signals in human vision |
| title_full_unstemmed | Binocular summation of second-order global motion signals in human vision |
| title_short | Binocular summation of second-order global motion signals in human vision |
| title_sort | binocular summation of second-order global motion signals in human vision |
| url | https://eprints.nottingham.ac.uk/27748/ https://eprints.nottingham.ac.uk/27748/ https://eprints.nottingham.ac.uk/27748/ |