A number of psychophysical and physiological studies have suggested that first-and second-
order motion signals are processed, at least initially, by independent pathways, and that the …

We studied scotopic motion mechanisms, using a two-frame sinusoidal grating separated by
various ISIs equated for mean luminance level. Perceived direction of displacement varied …

The performance of a 'motion blind'patient on a series of tasks in which the perception of
motion played an essential or no role was compared with that of a human subject with …

The phenomenon of non-Fourier motion (visually perceived motion that cannot be explained
simply on the basis of the autocorrelation structure of the visual stimulus) is well recognized …

It is now well established that monkey extrastriate cortex, the visual cortex beyond primary or
striate cortex, contains many different areas (for review, see Van Essen et al., 1992; …

In one type of cyclopean motion stimulus one eye views a counterphase flickering grating
while the other eye views the same pattern in spatio-temporal quadrature. Algebraic …

Since the discovery of spatial-frequency-tuned channels in the visual system, most theories
attempting to account for pattern encoding have assumed that the filters can be …

Random dot patterns and white-noise luminance textures are widely used in psychophysical
experiments to study low-level visual processes. Because these noise patterns are …

We have used the minimum-motion stimulus of Cavanagh, MacLeod and Anstis
(1987)[Journal of the Optical Society of America A, 4, 1428–1438] to examine how signals …

In motion perception, luminance-defined stimuli (first-order motion) are distinguished from
stimuli defined by more complex attributes (second-order motion), because they differ in …