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Related Experiment Videos

Stability and change in perception: spatial organization in temporal context.

Sergei Gepshtein1, Michael Kubovy

  • 1Vision Science, University of California at Berkeley, 360 Minor Hall, Berkeley, CA 94720-2020, USA. sergeg@uclink.berkeley.edu

Experimental Brain Research
|November 2, 2004
PubMed
Summary
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Perceptual multistability may not require adaptation or hysteresis. Instead, lasting visual system states, influenced by an intrinsic bias, explain these phenomena. This challenges traditional views on visual perception.

Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Perceptual multistability is traditionally explained by adaptation and hysteresis.
  • These concepts imply dedicated neural mechanisms for change detection and memory.

Purpose of the Study:

  • To investigate alternative explanations for perceptual multistability.
  • To determine if lasting states of the visual system can account for adaptation-like and hysteresis-like effects.

Main Methods:

  • Observers viewed two successive multistable stimuli.
  • The probability of perceiving a favored organization in the first and second stimuli was recorded.
  • The relationship between perceptions of successive stimuli was analyzed.

Main Results:

Related Experiment Videos

  • A negative contingency was observed: perceiving a favored organization in the first stimulus decreased its probability in the second.
  • This effect was orientation-tuned and independent of prior perception.
  • An interaction between this negative contingency and a hysteresis-like effect was found.

    • Conclusions:

    • Perceptual multistability may reflect stable, intrinsic states of the visual system, not solely adaptation or hysteresis.
    • A probabilistic model incorporating an orientation-tuned, slowly changing intrinsic bias explains the observed effects.
    • This challenges the necessity of dedicated adaptation and hysteresis mechanisms in visual perception.