The flexible focus: whether spatial attention is unitary or divided depends on observer goals.

Journal of Experimental Psychology: Human Perception and Performance The Flexible Focus: Whether Spatial Attention Is Unitary or Divided Depends on Observer Goals

Spatial Attention Can Be Allocated Rapidly and in Parallel to New Visual Objects

In real-life visual environments, where multiple objects compete for processing, new objects that require immediate attention often appear when attention is already focused elsewhere. The question of whether spatial attention can be directed independently to different locations in the visual field remains controversial. Serial models assume a unitary attentional focus that is directed to one ob...

Attention: Effect on Perception

Attention is the mechanism that allows us to select relevant information for processing from the vast amount of stimuli we are confronted with, prioritizing some while ignoring others. Attention can affect perception by altering performance—how well we perform on a given task—or by altering appearance— our subjective experience of a stimulus or object. Visual attention is commonly divided into ...

Development of a Robust Observer for General Form Nonlinear System: Theory, Design and Implementation

The problem of observer design for nonlinear systems has got great attention in the recent literature. The nonlinear observer has been a topic of interest in control theory. In this research, a modified robust sliding-mode observer (SMO) is designed to accurately estimate the state variables of nonlinear systems in the presence of disturbances and model uncertainties. The observer has a simple ...

A unitary focus of spatial attention during attentional capture: Evidence from event-related brain potentials.

We studied whether attentional capture in vision can be elicited simultaneously at multiple locations in the visual field or whether it is always restricted to a single location. Participants searched for color singleton targets in search arrays that were preceded by spatially uninformative color cue arrays. Single cue arrays contained a unique color singleton among gray background items, and d...