This brief review article brings together a series of related experiments in psychophysics and
physiology that show striking similarities between measurements in human observers and in …

Crowding, the difficulty in recognizing a letter flanked by other letters, has been explained as
a lateral masking effect. The purpose of this study was to examine the spatial-frequency and …

For the linear discrimination of two stimuli in white Gaussian noise in the presence of
internal noise, a method is described for estimating linear classification weights from the …

It has been suggested that the improvement of vernier acuity in the course of practice reflects
“fine tuning” of the visual mechanisms underlying vernier acuity. Masking studies suggest …

The present study tests the effects of practice on parafoveal vernier and resolution acuity. By
measuring task specificity, transfer of training to other retinal locations in the trained eye and …

Here we demonstrate a method for constructing stimulus classification images. These
images provide information regarding the stimulus aspects the observer uses to segregate …

We investigated the effect of adaptation on orientation discrimination using two experienced
observers, then replicated the main effects using a total of 50 naı̈ve subjects. Orientation …

It is well known that attention increases the discriminability of some types of spatial
information. To ascertain more specifically which types of spatial information benefit from …

We used a visual evoked-potential measure to study the development of two components of
pattern vision, vernier acuity and grating acuity, in humans from early infancy through …

We studied the effects of various patterns as contextual stimuli on human orientation
discrimination, and on responses of neurons in V1 of alert monkeys. When a target line is …