Directional motion processing is a pervasive and functionally important feature of the visual
system. Behavioural and VEP studies indicate that it appears as a cortical function after …

The optic tectum is the largest visual center in most vertebrates and the main target for
retinal ganglion cells (RGCs) conveying visual information from the eye to the brain. The …

Display systems based on conventional computer graphics cards are capable of generating
images with about 8-bit luminance resolution. However, most vision experiments require …

Motion of an object is thought to be perceived independently of the object's surface
properties. However, theoretical, neuropsychological and psychophysical observations have …

Objects displaced intermittently across the visual field will nonetheless give an illusion of
continuous motion [called apparent motion (AM)] under many common conditions. It is …

Perceptual organization lies on the border between our experience of the world and
unconscious perceptual processing. It is difficult to study because it involves both bottom-up …

Using PET, we studied the processing of different types of motion in an opposed‐direction
discrimination task. We used first‐order motion and two types of higher‐order motion …

Converging psychophysical and electrophysiological evidence suggests that first-order
(luminance-defined) complex motion types ie, radial and rotational motion, are processed by …

We used the Pulfrich effect to investigate perception of motion in depth. Independent
manipulation of spatial and temporal frequency content in stereoscopic motion stimuli …

For over 30 years there has been a controversy over whether color-defined motion can be
perceived by the human visual system. Some results suggest that there is no chromatic …