1. Human perceptual learning in discrimination of the oblique orientation was studied using
psychophysical methods. Subjects were trained daily to improve their ability to identify the …

The ability of human observers to discriminate the orientation of a pair of straight lines
differing by 3° improved with practice. The improvement did not transfer across hemifield or …

This investigation is concerned with the spatial elaboration of retinal signals occurring in the
visual system. Guided by the recent electrophysiological evidence that retinal orientation is …

Recent physiological experiments have shown that the responses of many neurons in V1
and V3a are modulated by the direction of gaze. We have developed a neural network …

Perceptual learning of orientation discrimination is reported to be precisely specific to the
trained retinal location. This specificity is often taken as evidence for localizing the site of …

We have examined the dependence of rotational acuity on the orientation bandwidth of a
stimulus using two-dimensional, band-pass filtered, spatial noise. Stimuli had a bandwidth of …

We measured the roles of eye muscle proprioception (“inflow”) and efference copy
(“outflow”) in registering eye position. During monocular fixation, pressing on the side of an …

Performance in visual tasks is limited by the low-level mechanisms that sample the visual
field. It is well documented that contrast sensitivity and spatial resolution decrease as a …

The contention is examined that the oblique effect, ie, the well-known performance deficit in
detecting orientation difference in oblique lines as compared to vertical and horizontal ones …

With training, an observer's ability to discriminate similar directions of motion gradually
improves. A series of studies reveals that this improvement,(1) is restricted to the trained …