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How to Create and Use Binocular Rivalry
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Published on: November 10, 2010

Competition-strength-dependent ground suppression in figure-ground perception.

Elizabeth Salvagio1, Laura Cacciamani, Mary A Peterson

  • 1Department of Psychology, University of Arizona, 1503 E. University Blvd., Tucson, AZ 85721, USA. bsalvag@email.arizona.edu

Attention, Perception & Psychophysics
|March 7, 2012
PubMed
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Figure-ground segregation involves competition, where the perceived figure suppresses the ground. Increased competition intensifies this ground suppression, supporting inhibitory competition models in visual perception.

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Area of Science:

  • Visual Perception
  • Cognitive Neuroscience
  • Computational Neuroscience

Background:

  • Figure-ground segregation is a fundamental visual process, often modeled by inhibitory competition between potential figure and ground elements.
  • Evidence supporting ground suppression, a key prediction of inhibitory competition models, is limited, hindering a full understanding of visual scene perception.
  • Understanding ground suppression is crucial for explaining the shapelessness of ground regions adjacent to figures.

Purpose of the Study:

  • To investigate the role of inhibitory competition in figure-ground segregation by manipulating the level of potential competition on the ground side.
  • To provide empirical evidence for ground suppression and its relationship with the intensity of competition from potential ground objects.
  • To determine the temporal dynamics of ground suppression.

Main Methods:

  • Two experiments assessed ground suppression using orientation judgments of target bars under conditions of high versus low competition from familiar or novel objects.
  • A third experiment investigated the duration of ground suppression.
  • Behavioral measures (orientation judgments) were used to quantify perceptual effects.

Main Results:

  • Increased competition from potential objects on the ground side led to greater ground suppression, confirming the primary prediction.
  • Ground suppression was found to be transient, indicating it is a short-lived perceptual phenomenon.
  • Results consistently supported the hypothesis that competition intensity directly influences the degree of ground suppression.

Conclusions:

  • The findings provide strong support for inhibitory competition models of figure assignment in visual perception.
  • The results suggest that feedback mechanisms play a significant role in visual perception models.
  • This study contributes to explaining the perceptual characteristics of ground regions during figure-ground segregation.