This chapter focuses on the effect of covert spatial attention on contrast sensitivity, a basic
visual dimension where the best mechanistic understanding of attention has been achieved …

We investigated the mechanisms underlying the effects of sustained and transient covert
attention on contrast sensitivity. The aim of this study was twofold:(1) Using a zero-noise …

The executive attention theory of working memory capacity (WMC) proposes that measures
of WMC broadly predict higher order cognitive abilities because they tap important and …

Exogenous covert attention is an automatic, transient form of attention that can be triggered
by sudden changes in the periphery. Here we test for the effects of attention on color …

Practice effects were examined in a masked letter discrimination task and a masked
brightness discrimination task for college-age and 60-to 75-year-old subjects. The diffusion …

Attending to the location of an expected visual target can lead to anticipatory activations in
spatiotopic occipital cortex, emerging before target onset. But less is known about how the …

In this study, we investigated how spatial resolution and covert attention affect performance
in a texture segmentation task in which performance peaks at midperiphery and drops at …

External noise paradigms, measuring contrast threshold as a function of external noise
contrast (the “TvC” function), provide a valuable tool for studying perceptual mechanisms …

In this study, we applied the external noise method and the PTM model to identify
mechanisms underlying performance deficits in amblyopia. Amblyopic and normal …

Dosher and Lu (1998)[Perceptual learning reflects external noise filtering and internal noise
reduction through channel reweighting. Proceedings of the National Academy of Sciences of …