Stereomovement from interocular delay in dynamic visual noise: a random spatial disparity hypothesis

Area of Science:

• Visual perception
• Stereoscopic vision
• Psychophysics

Background:

• Stereoscopic vision arises from viewing slightly different images with each eye.
• The random spatial disparity hypothesis (1974) attempts to explain stereophenomena.
• Dynamic visual noise with interocular delay can elicit stereoscopic effects.

Purpose of the Study:

• To test the assumptions of the random spatial disparity hypothesis.
• To investigate a novel stereophenomenon involving reversed stereomovement.
• To determine which hypothesis best explains observed stereoscopic effects.

Main Methods:

• Experimental testing of the random spatial disparity hypothesis.
• Presentation of dynamic visual noise with interocular delay.
• Introduction of complementary contrast between the two eyes.

Main Results:

• Results supported the random spatial disparity hypothesis over two alternatives.
• A new phenomenon of reversed stereomovement was observed.
• The random spatial disparity hypothesis successfully explained the reverse stereomovement.

Conclusions:

• The random spatial disparity hypothesis is a valid explanation for stereoscopic phenomena with dynamic visual noise.
• A novel reverse stereomovement phenomenon can be induced and is explained by this hypothesis.
• Further research into visual processing of disparity and contrast is warranted.