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Related Experiment Videos

Perceptual filling-in: a parametric study

P De Weerd1, R Desimone, L G Ungerleider

  • 1Laboratory of Brain and Cognition, NIMH, NIH, Bethesda, MD 20892-4415, USA. pdw@ln.nimh.nih.gov

Vision Research
|October 17, 1998
PubMed
Summary
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Perceptual filling-in time depends on how early visual areas process a figure

Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Science

Background:

  • Perceptual filling-in is a phenomenon where a uniform area is perceived as filled by the surrounding background.
  • Understanding the mechanisms of filling-in is crucial for comprehending visual perception and figure-ground segregation.

Purpose of the Study:

  • To investigate the relationship between the cortical projection size of a figure and the time required for perceptual filling-in.
  • To determine whether filling-in time reflects figure-ground segregation failure or a slow spread of background.
  • To explore the interaction between surface segregation and filling-in in normal perception.

Main Methods:

  • Maintained peripheral viewing of uniform gray or red figures on a textured background.
  • Systematic variation of figure size, shape, and eccentricity.

Related Experiment Videos

  • Correlation analysis between figure properties, cortical projection size, and filling-in time.

    • Main Results:

    • Filling-in time varied with figure size, shape, and eccentricity.
    • These variations were predictable from the size of the figure's cortical projection in early visual areas.
    • Evidence suggests filling-in time is related to the failure of figure-ground segregation.

    Conclusions:

    • The time course of perceptual filling-in is influenced by the neural representation of the figure in early visual cortex.
    • Filling-in appears to be driven by the breakdown of figure-ground segregation rather than a gradual background spread.
    • Findings highlight the interplay between surface segregation and filling-in, fundamental to normal surface perception.