Both exogenous and endogenous covert spatial attention enhance contrast sensitivity, a
fundamental measure of visual function that depends substantially on the spatial frequency …

We examined the effect of transient covert attention on the psychometric function for contrast
sensitivity in an orientation discrimination task when the target was presented alone in the …

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 …

Covert spatial attention increases the perceived contrast of stimuli at attended locations,
presumably via enhancement of visual neural responses. However, the relation between …

Natural scenes contain a rich variety of contours that the visual system extracts to segregate
the retinal image into perceptually coherent regions. Covert spatial attention helps extract …

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 …

This study is the first to report the benefits of spatial covert attention on contrast sensitivity in
a wide range of spatial frequencies when a target alone was presented in the absence of a …

Asymmetries in visual performance at isoeccentric locations are well-documented and
functionally important. At a fixed eccentricity, visual performance is best along the horizontal …

Contrast sensitivity functions (CSFs) were measured in the foveal region while subjects
simultaneously performed an instantaneous judgment task, which was designed to maintain …

Human visual performance for basic visual dimensions (eg, contrast sensitivity and acuity)
peaks at the fovea and decreases with eccentricity. The eccentricity effect is related to the …