The pattern of lateral interactions in the primary visual cortex, which has emerged from
recent studies, conforms to the grouping rules of similarity, proximity, smoothness and …

Embryonal tumours of the central nervous system (CNS) represent a heterogeneous group
of tumours about which little is known biologically, and whose diagnosis, on the basis of …

Practicing certain visual tasks leads, as a result of a process termed “perceptual learning,” to
a significant improvement in performance. Learning is specific for basic stimulus features …

In this review we consider the logic and the evidence relating to the issue of dynamic
grouping in human vision. Dynamic grouping is required when the visual system is creating …

Contour integration is an important intermediate stage of object recognition, in which line
segments belonging to an object boundary are perceptually linked and segmented from …

The influence of configuration on visual crowding was tested. Eight Gabor patches
surrounding a central one were arranged in a way that created several global configurations …

The apparent contrast of a central stimulus is affected by the presence of surrounding
stimuli. For some stimulus conditions, the apparent contrast is suppressed and for other …

A race-like model is developed to account for various phenomena arising in simple reaction
time (RT) tasks. Within the model, each stimulus is represented by a number of grains of …

Spatial crowding is a well-known deficit in amblyopia. We have previously reported
evidence suggesting that the inability to isolate stimuli in space in crowded displays (spatial …

Microsaccades are small rapid and involuntary eye movements that occur during fixation in
an apparently stochastic manner. They are known to be inhibited in response to sensory …