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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Updated: Nov 9, 2025

Using Looming Visual Stimuli to Evaluate Mouse Vision
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Serial dependence does not originate from low-level visual processing.

Gizay Ceylan1, Michael H Herzog1, David Pascucci1

  • 1Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.

Cognition
|April 10, 2021
PubMed
Summary
This summary is machine-generated.

Serial dependence (SD) in perception, where past stimuli bias current judgments, is shown to occur after initial perception. This bias arises from post-perceptual, likely decisional, processes, not sensory encoding.

Keywords:
Decision inertiaHistory biasPerceptionSerial dependence

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Perception is influenced by prior sensory history.
  • Serial dependence (SD) causes current judgments to resemble past stimuli.
  • The origin of SD (perceptual vs. post-perceptual) is debated.

Purpose of the Study:

  • To investigate whether serial dependence arises from perceptual or post-perceptual stages.
  • To differentiate between perceptual and decisional contributions to SD.

Main Methods:

  • Presenting Gabor patches with varying spatial frequencies.
  • Intermixing Gabor patches with dot patterns.
  • Analyzing behavioral responses for SD effects despite perceptual dissimilarities.

Main Results:

  • Robust SD effects were observed even when stimuli were perceptually dissimilar.
  • Findings indicate SD is not solely based on initial sensory processing.
  • Evidence supports a post-perceptual origin for SD.

Conclusions:

  • Serial dependence likely originates from post-perceptual, possibly decisional, mechanisms.
  • Current models of SD may need re-evaluation.
  • The study challenges purely perceptual explanations for SD.