Many studies have investigated how multiple stimuli combine to reach threshold. There are
broadly speaking two ways this can occur: additive summation (AS) where inputs from the …

The perceived shapes of almost circular paths are modified by concentrically placed context
paths. These induced changes have previously been attributed to curvature masking. This …

The term visual agnosia is used to refer to recognition disorders that are confined to the
visual modality, that are not due to an impairment in sensory functions, and that cannot be …

Abstract Objects are often identified by the shape of their contours. In this study, visual
search tasks were used to reveal a visual dimension critical to the analysis of the shape of a …

Previously, researchers have used circular contours with sinusoidal deformations of the
radius (radial frequency [RF] patterns) to investigate the underlying processing involved in …

There is an ongoing debate over whether there is convincing evidence in support of global
contour integration in shape discrimination tasks, particularly when using radial frequency …

Shape is a critical cue to object identity. In psychophysical studies, radial frequency (RF)
patterns, paths deformed from circular by a sinusoidal modulation of radius, have proved …

Radial frequency (RF) patterns, which are sinusoidal modulations of a radius in polar
coordinates, are commonly used to study shape perception. Previous studies have argued …

Scenery and complex objects can be reduced to a combination of shapes, so it is pertinent
to examine if the integration of information found occurring around simple contours also …

Radial frequency (RF) patterns are used to assess how the visual system processes shape.
They are thought to be detected globally. This is supported by studies that have found …