Contribution of Colour to the Motion Aftereffect and Motion Perception
- 1 October 1994
- journal article
- research article
- Published by SAGE Publications in Perception
- Vol. 23 (10), 1221-1231
- https://doi.org/10.1068/p231221
Abstract
The aim in this work was to assess the contribution which colour information makes to the perception of motion. Two dependent variables were measured: the reaction time to a sudden cessation of motion (motion-end RT) and the duration of the motion aftereffect (MAE). In each case, a baseline measure of performance was made with the aid of a monochrome stimulus with a given contrast and added luminance noise. This was compared with performance when red/green colour modulation was added to the luminance display. Any difference between these measures would reveal the extent of chromatic input. For motion-end RT the addition of colour had little effect under conditions where the stimulus had a strong luminance component and little added luminance noise. Increasing departures from these conditions revealed the contribution of a colour-sensitive mechanism. In general, the chromatic contribution to MAE duration was much smaller than was the equivalent contribution to motion-end RT, thus possibly indicating a neurological dissociation between the mechanisms subserving these effects. The results of an experiment in which the effect of different temporal frequencies of the added luminance noise was assessed supported this dissociation between MAE and motion-end RT. The findings are therefore consistent with there being two motion (sub)systems, which differ in the extent of chromatic input. The subsystem revealed by MAE measures is less affected by colour information.Keywords
This publication has 24 references indexed in Scilit:
- The relation between the velocity of visual motion and the reaction time to motion onset and offsetVision Research, 1992
- Isoluminant stimuli may not expose the full contribution of color to visual functioning: Spatial contrast sensitivity measurements indicate interaction between color and luminance processingVision Research, 1992
- Motion processing by chromatic and achromatic visual pathwaysJournal of the Optical Society of America A, 1989
- Motion: The long and short of itSpatial Vision, 1989
- Monocular motion sensing, binocular motion perceptionVision Research, 1989
- Spectral sensitivity for flicker and acuity criteriaJournal of the Optical Society of America A, 1988
- Perception of Motion in Equiluminous KinematogramsPerception, 1985
- The low level motion system has both chromatic and luminance inputsVision Research, 1985
- Perceived velocity of moving chromatic gratingsJournal of the Optical Society of America A, 1984
- A short-range process in apparent motionVision Research, 1974