Subthreshold addition of real and apparent motion

doi:10.1016/0042-6989(81)90101-2

Vision Research

Volume 21, Issue 4, 1981, Pages 557-564

https://doi.org/10.1016/0042-6989(81)90101-2 Get rights and content

Abstract

The subthreshold interaction of real and apparent motion has been investigated by measurement of threshold-illumination levels for detection of a continuously moving target in the presence of subthreshold apparent movement. The results of these experiments show that the subthreshold illumination level of the apparent motion stimulus configuration adds almost linearly to the threshold illumination level for detection of a continuously moving target, provided that the direction of apparent motion movement corresponds to that of the test target. The maximum interaction is observed for test target speeds centred around the “equivalent” target speed of the apparent motion stimulus configuration, and falls gradually as the relative direction of the two motion stimuli is made increasingly dissimilar. Subthreshold-apparent motion in the opposite direction to that of the test target fails to cause any significant change in threshold illumination levels for detection of the continuously moving target over the whole range of test target speeds. These results suggest that the extraction of movement information in response to continuous target displacement on the retina involves visual mechanisms which also contribute to the extraction of apparent movement.

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Subthreshold addition of real and apparent motion

Abstract

Vision Res.

Vision Res.

Vision Res.

Vision Res.

Vision Res.

Vision Res.

Vision Res.

Vision Res.

Phi movement as a subtraction process

Vision Res.

A simple 8-channel data logger

Photobiol. Bull.

The spatial organization of movementdetecting mechanisms in human vision

Spatial chacteristics of movement detecting mechanisms in human vision I achromatic vision

Biol. Cybernet.

The mechanisms of directionally selective units in rabbit's retina

J. Physiol.

An aftereffect to discrete stimuli producing apparent movement and succession

Percept. Psychophys.

An analysis of the visual perception of movement

Br. J. Psychol.

Visual perception of movement

Am. J. Psychol.

The effect of exposure time upon the reiz limen of visible motion

J. exp. Psychol.

Some experiments on the detection of motion by the human visual system and their theoretical interpretation

Some theoretical aspects of an apparent motion phenomenon associated with certain classes of flashing lights

The visual perception of objective motion and subjective movement

Psychol. Rev.