Probing intermediate stages of shape processing

G Loffler - Journal of Vision, 2015 - jov.arvojournals.org
The visual system provides a representation of what and where objects are. This entails
parsing the visual scene into distinct objects. Initially, the visual system encodes information …

Mental structures

KJ Lande - Noûs, 2021 - Wiley Online Library
An ongoing philosophical discussion concerns how various types of mental states fall within
broad representational genera—for example, whether perceptual states are “iconic” or …

Visual search targeting either local or global perceptual processes differs as a function of autistic-like traits in the typically developing population

RA Almeida, JE Dickinson, MT Maybery… - Journal of autism and …, 2013 - Springer
Relative to low scorers, high scorers on the Autism-Spectrum Quotient (AQ) show enhanced
performance on the Embedded Figures Test and the Radial Frequency search task (RFST) …

Global shape aftereffects have a local substrate: A tilt aftereffect field

JE Dickinson, RA Almeida, J Bell… - Journal of …, 2010 - jov.arvojournals.org
Adaptation to prevailing stimuli is a ubiquitous property of the visual system that optimizes its
dynamic range. The perceived difference in orientation of successively presented lines of …

[HTML][HTML] Non-linear global pooling in the discrimination of circular and non-circular shapes

G Schmidtmann, GJ Kennedy, HS Orbach, G Loffler - Vision Research, 2012 - Elsevier
The ability to discriminate minute deviations from circularity is dependent upon global
summation mechanisms integrating information along entire contours. The aim of this study …

[HTML][HTML] Radial frequency adaptation reveals interacting contour shape channels

J Bell, F Wilkinson, HR Wilson, G Loffler, DR Badcock - Vision Research, 2009 - Elsevier
Combinations of radial frequency (RF) patterns may be used to represent the contours of
complex shapes. Previous work has shown that many radial frequency patterns are …

Near their thresholds for detection, shapes are discriminated by the angular separation of their corners

JE Dickinson, J Bell, DR Badcock - PloS one, 2013 - journals.plos.org
Observers make sense of scenes by parsing images on the retina into meaningful objects.
This ability is retained for line drawings, demonstrating that critical information is …

[HTML][HTML] Narrow-band radial frequency shape channels revealed by sub-threshold summation

J Bell, DR Badcock - Vision Research, 2009 - Elsevier
Radial Frequency (RF) contours provide a unifying system to represent familiar shapes,
such as triangles (RF3), squares (RF4) and pentagons (RF5), but it is not clear whether …

Detecting shape change: Characterizing the interaction between texture-defined and contour-defined borders

KWS Tan, JE Dickinson, DR Badcock - Journal of Vision, 2013 - jov.arvojournals.org
The human visual system's extreme sensitivity to subtle changes in shape can often be
attributed to global pooling of local information. This has been shown for shapes described …

[HTML][HTML] Global shape processing involves a hierarchy of integration stages

J Bell, E Gheorghiu, RF Hess, FAA Kingdom - Vision Research, 2011 - Elsevier
Radial Frequency (RF) patterns can be used to study the processing of familiar shapes, eg
triangles and squares. Opinion is divided over whether the mechanisms that detect these …