What are the dynamics of global feature-based and spatial attention, when deployed
together? In an attentional shifting experiment, flanked by three control experiments, we …

A key property of feature-based attention is global facilitation of the attended feature
throughout the visual field. Previously, we presented superimposed red and blue randomly …

Shifting attention from one color to another color or from color to another feature dimension
such as shape or orientation is imperative when searching for a certain object in a cluttered …

Cues that direct selective attention to a spatial location have been observed to increase
baseline neural activity in visual areas that represent a to-be-attended stimulus location …

In natural vision, processing of spatial and nonspatial features occurs simultaneously;
however, the two types of attention in charge of facilitating this processing have distinct …

In many common situations such as driving an automobile it is advantageous to attend
concurrently to events at different locations (eg, the car in front, the pedestrian to the side) …

Top–down control of visual sensory cortex has long been tied to the orienting of visual
spatial attention on a rapid, moment-to-moment basis. Here, we examined whether sensory …

When spatial attention is directed toward a particular stimulus, increased activity is
commonly observed in corresponding locations of the visual cortex. Does this attentional …

It is well-established that attention can select stimuli for preferential processing on the basis
of non-spatial features such as color, orientation, or direction of motion. Evidence is mixed …

This study investigated the nature and dynamics of the top-down control mechanisms that
afford attentional selection using event-related potentials (ERPs) and dipole-source …