The principle of uniform connectedness (SE Palmer & I. Rock, 1994) states that connected
regions of uniform visual properties correspond to the entry-level units of visual stimuli. The …

We used a constrained classification task to examine the perceptual relations between
global and local levels in hierarchical patterns composed of many, relatively small elements …

In two experiments, visual search and speeded classification were used to study perception
of hierarchical patterns among participants aged 5 to 23 years. Perception of global …

Five experiments with 169 undergraduates investigated perceived organization of
hierarchically constructed patterns, using similarity judgments and a verbal description task …

The role of perceptual grouping and the encoding of closure of local elements in the
processing of hierarchical patterns was studied. Experiments 1 and 2 showed a global …

Our recent research with compound stimuli (Han, Humphreys, & Chen, 1999a) suggests that
grouping between local elements facilitates the perception of global structure, whereas …

It is widely assumed that the grouping of the visual field first described by the Gestalt
psychologists and the related phenomenon of texture segregation occur very early in the …

The perceptual organization of image patterns is considered from 2 standpoints. First, a
theoretical framework is presented from which computational models of perceptual …

A principle of perceptual organization, called uniform connectedness (UC), is described, and
a theoretical approach to perceptual organization is proposed in which this principle plays a …

In order to study the relative perceptual availability of global and local features in very
sparse patterns, subjects were asked to make 'same'/'different'judgments on pairs of …