Journal article
Sharpness overconstancy: the roles of visibility and current context
Vision Research, Vol.39(16), pp.2649-2657
1999
Abstract
In a previous study we found that blurred edges presented in peripheral vision look sharper than when they are looked at directly, a phenomenon we have called peripheral sharpness overconstancy (Galvin et al. (1997). Vision Research, 37, 2035-2039). In the current study we show that when visibility of the stimulus edges is compromised by very brief presentations, we can demonstrate sharpness overconstancy for static, foveal viewing. We also test whether the degree of sharpening is a function of the current visual context, but find no difference between the peripheral sharpness overconstancy (at 24°eccentricity) of edges measured in a blurred context and that measured in a sharp context. We conclude that if the visual system does carry a template for sharp edges which contributes to edge appearance when visibility is poor, then that template is resistant to changes in context.
Details
- Title
- Sharpness overconstancy: the roles of visibility and current context
- Authors/Creators
- S.J. Galvin (Author/Creator) - University of OtagoR.P. O'Shea (Author/Creator) - University of OtagoA.M. Squire (Author/Creator) - University of OtagoD.S. Hailstone (Author/Creator) - University of Otago
- Publication Details
- Vision Research, Vol.39(16), pp.2649-2657
- Publisher
- Elsevier Ltd
- Identifiers
- 991005541449207891
- Copyright
- © 2007 Elsevier B.V.
- Murdoch Affiliation
- School of Psychology and Exercise Science
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 1 Clinical & Life Sciences
- 1.7 Neuroscanning
- 1.7.203 Visual Perception
- Web Of Science research areas
- Neurosciences
- Ophthalmology
- Psychology
- ESI research areas
- Neuroscience & Behavior