Although luminance contrast plays a predominant role in motion perception, significant
additional effects are introduced by chromatic contrasts. In this paper, relevant results from …

Relational Psychophysics in Humans and Animals offers a comprehensive and integrated
overview of the often fragmented field of psychophysics. It introduces key concepts in …

While moving objects are usually seen using luminance (first-order) cues, humans can
perceive the motion of objects via non-luminance (second-order) cues. Contrary to previous …

In primates, tracking eye movements help vision by stabilising onto the retinas the images of
a moving object of interest. This sensorimotor transformation involves several stages of …

Color constancy refers to our remarkable ability to perceive the color of objects nearly
constant despite considerable changes in the spectral content of the illumination. As such it …

Masking experiments, using vertical and horizontal sinusoidal depth corrugations, have
suggested the existence of more than two spatial‐frequency disparity mechanisms. This …

Transient apparent-motion stimuli, consisting of single 1/4-wavelength steps applied to
square-wave gratings lacking the fundamental (“missing fundamental stimulus”) and to …

As discovered by the Gestaltists, in particular by Duncker, we often perceive motion to be
within a non-retinotopic reference frame. For example, the motion of a reflector on a bicycle …

Our world is full of motion. Nearly all animals have the ability to locomote, and most use
movement as the primary way to find food, potential mates, and safe shelter. Consequently …

Thresholds for identifying the direction of second-order motion (contrast-modulated dynamic
noise) are consistently higher than those for identifying spatial orientation, unlike first-order …