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dc.contributor.authorSchmidtmann, G.*
dc.contributor.authorLogan, Andrew J.*
dc.contributor.authorKennedy, Graeme J.*
dc.contributor.authorGordon, G.E.*
dc.contributor.authorLoffler, G.*
dc.date.accessioned2016-10-12T10:39:29Z
dc.date.available2016-10-12T10:39:29Z
dc.date.issued2015-04
dc.identifier.citationSchmidtmann G, Logan AJ, Kennedy GJ et al. (2015) Distinct lower visual field preference for object shape. Journal of Vision. 15(5): 18.en_US
dc.identifier.urihttp://hdl.handle.net/10454/9896
dc.descriptionYesen_US
dc.description.abstractHumans manipulate objects chiefly within their lower visual field, a consequence of upright posture and the anatomical position of hands and arms.This study tested the hypothesis of enhanced sensitivity to a range of stimuli within the lower visual field. Following current models of hierarchical processing within the ventral steam, discrimination sensitivity was measured for orientation, curvature, shape (radial frequency patterns), and faces at various para-central locations (horizontal, vertical, and main diagonal meridians) and eccentricities (5° and 10°). Peripheral sensitivity was isotropic for orientation and curvature. By contrast, observers were significantly better at discriminating shapes throughout the lower visual field compared to elsewhere. For faces, however, peak sensitivity was found in the left visual field, corresponding to the right hemispheric localization of human face processing. Presenting head outlines without any internal features (e.g., eyes, mouth) recovered the lower visual field advantage found for simple shapes. A lower visual field preference for the shape of an object, which is absent for more localized information (orientation and curvature) but also for more complex objects (faces), is inconsistent with a strictly feed-forward model and poses a challenge for multistage models of object perception. The distinct lower visual field preference for contour shapes is, however, consistent with an asymmetry at intermediate stages of visual processing, which may play a key role in representing object characteristics that are particularly relevant to visually guided actions.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1167/15.5.18en_US
dc.rights© 2015 The Association for Research in Vision and Ophthalmology, Inc. This work is licensed under a Creative Commons Attribution-Non-Commercial–No Derivatives License.en_US
dc.subjectOrientation discrimination; Curvature discrimination; Peripheral vision; Spatial vision; Shape perception; Face perception; Vertical meridian asymmetry; Horizontal vertical anisotropyen_US
dc.titleDistinct lower visual field preference for object shapeen_US
dc.status.refereedYesen_US
dc.date.Accepted2015
dc.date.application2015-04-29
dc.typeArticleen_US
dc.type.versionpublished version paperen_US
refterms.dateFOA2018-07-25T13:39:45Z


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