Form Perception

1.

P3a from visual stimuli: typicality, task, and topography.

A visual three-stimulus (target, nontarget, standard) paradigm was employed in which subjects responded only to the target. Nontarget stimulus properties were varied systematically to evaluate how stimulus typicality (non-novel vs. novel) across task ...
John Polich, Marco D Comerchero (Brain Topogr, 2003SPRING)
p-visual-stimuli-typicality-task-topography.asp

2.

Evidence against perceptual bias views for symmetry preferences in human faces.

Symmetrical human faces are attractive. Two explanations have been proposed to account for symmetry preferences: (i) the evolutionary advantage view, which posits that symmetry advertises mate quality and (ii) the perceptual bias view, which posits that ...
Anthony C Little, Benedict C Jones (Proc R Soc Lond B Biol Sci, 200309)
evidence-against-perceptual-bias-views-symmetry-preferences-human.asp

3.

An integrated network for invariant visual detection and recognition.

We describe an architecture for invariant visual detection and recognition. Learning is performed in a single central module. The architecture makes use of a replica module consisting of copies of retinotopic layers of local features, with a particular ...
Yali Amit, Massimo Mascaro (Vision Res, 200309)
integrated-network-invariant-visual-detection-recognition.asp

4.

Spatiotemporal characteristics of dynamic feature binding in visual working memory.

It has been proposed that visual working memory can hold a set of four to five coherent object representations. As a test of this proposal, I devised a paradigm called multiple object permanence tracking (MOPT) that measures memory for feature-location ...
Jun Saiki (Vision Res, 200309)
spatiotemporal-characteristics-dynamic-feature-binding-visual-working.asp

5.

The use of facial motion and facial form during the processing of identity.

Previous research has shown that facial motion can carry information about age, gender, emotion and, at least to some extent, identity. By combining recent computer animation techniques with psychophysical methods, we show that during the computation of ...
Barbara Knappmeyer, Ian M Thornton, Heinrich H Bülthoff (Vision Res, 200308)
facial-motion-facial-form-processing-identity.asp

6.

Attention enhances feature integration.

Perceptual processing delays between attribute dimensions (e.g. color, form and motion) [Proceedings of the Royal Society of London Series B 264 (1997) 1407] have been attributed to temporal processing asynchronies resulting from functional segregation ...
Liza Paul, Philippe G Schyns (Vision Res, 200308)
attention-enhances-feature-integration.asp

7.

Effects of pictorially-defined surfaces on visual search.

Three experiments of visual search for a cube (for a square pillar in Experiment 3) with an odd conjunction of orientation of faces and color (a cube with a red top face and a green right face among cubes with a green top face and a red right face, for ...
Hiromi Morita, Takatsune Kumada (Vision Res, 200308)
effects-pictorially-defined-surfaces-visual-search.asp

8.

When does illusory contour formation depend on contrast polarity?

Performance on a shape discrimination task was used to investigate when, and to what extent, illusory contour formation depends upon contrast polarity. It was found that shape discrimination performance was markedly worse when contrast polarity reversed ...
Branka Spehar, Colin W G Clifford (Vision Res, 200308)
illusory-contour-formation-depend-contrast-polarity.asp

9.

Detection of change in shape: an advantage for concavities.

Shape representation was studied using a change detection task. Observers viewed two individual shapes in succession, either identical or one a slightly altered version of the other, and reported whether they detected a change. We found a dramatic ...
Elan Barenholtz, Elias H Cohen, Jacob Feldman, Manish Singh (Cognition, 200308)
detection-change-shape-advantage-concavities.asp

10.

Neural correlates of implied motion.

Current views of the visual system assume that the primate brain analyses form and motion along largely independent pathways; they provide no insight into why form is sometimes interpreted as motion. In a series of psychophysical and electrophysiological ...
Bart Krekelberg, Sabine Dannenberg, Klaus-Peter Hoffmann, Frank Bremmer, John Ross (Nature, 200308)
neural-correlates-implied-motion.asp