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Related Experiment Video

Updated: Jun 8, 2026

How to Create and Use Binocular Rivalry

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

Detecting contrast changes in invisible patterns during binocular rivalry.

Sam Ling¹, Bjorn Hubert-Wallander, Randolph Blake

¹Department of Psychology/Vanderbilt Vision Research Center, Vanderbilt University, Nashville, TN, USA. s.ling@vanderbilt.edu

Vision Research

|September 23, 2010

Summary

This summary is machine-generated.

Humans can detect even subtle contrast reductions in suppressed visual stimuli during binocular rivalry. This finding suggests rivalry suppression impacts neural contrast processing, affecting both visibility and perception of weakened visual information.

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Area of Science:

Neuroscience
Perceptual Psychology
Vision Science

Background:

Binocular rivalry occurs when dissimilar images presented to each eye lead to alternating perceptual dominance.
Stimuli presented during the suppressed phase are typically harder to detect.
Previous research focused on detecting new stimuli during suppression, not changes to the suppressed stimulus itself.

Purpose of the Study:

To investigate if observers can detect contrast decrements in a suppressed stimulus during binocular rivalry.
To compare the detection of contrast increments and decrements during dominance versus suppression.
To understand how rivalry suppression affects the neural contrast response function.

Main Methods:

Observers performed contrast change detection tasks for rival stimuli presented during dominance and suppression phases.
Thresholds for detecting contrast increments and decrements were measured.
Experiments used both simple rival patterns and complex images of faces.

Main Results:

Contrast increment detection thresholds were higher during suppression than dominance, consistent with prior work.
Contrast decrement detection thresholds were significantly elevated during suppression, indicating detection of weakened stimuli.
Similar patterns were observed for both simple patterns and complex facial images.

Conclusions:

Observers can detect contrast decrements in stimuli that are perceptually suppressed during binocular rivalry.
Rivalry suppression modulates neural contrast response by reducing gain and shifting contrast gain, irrespective of image complexity.
These findings offer new insights into the neural mechanisms underlying visual perception and suppression.