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Related Concept Videos

Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
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Depth Perception and Spatial Vision

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Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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Related Experiment Video

Updated: May 31, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Coherent illusory contours reduce microsaccade frequency.

Alexis D J Makin1, Rochelle Ackerley, Kelly Wild

  • 1School of Psychological Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom. alexis.makin@liverpool.ac.uk

Neuropsychologia
|June 21, 2011
PubMed
Summary
This summary is machine-generated.

Gamma band oscillations may not solely indicate visual object binding. New research reveals microsaccade rates, not gamma oscillations, differ between coherent and incoherent shapes, challenging previous assumptions.

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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Related Experiment Videos

Last Updated: May 31, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
07:12

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • High-frequency gamma band oscillations (30-100 Hz) are theorized to enable visual feature binding into object representations.
  • Induced gamma band oscillations (iGBRs) are observed after coherent, but not incoherent, Kanizsa triangles.
  • Recent studies suggest EEG-recorded iGBRs might stem from microsaccades.

Purpose of the Study:

  • To investigate the relationship between microsaccades and visual perceptual binding.
  • To test if microsaccades explain induced gamma band oscillations (iGBRs) in visual binding tasks.
  • To re-evaluate the role of gamma oscillations in object representation.

Main Methods:

  • Presented participants with coherent and incoherent Kanizsa triangles.
  • Recorded electroencephalography (EEG) to measure brain activity and eye movements.
  • Analyzed microsaccade rebound rates following shape presentation.

Main Results:

  • Microsaccade rebound rate was significantly higher after incoherent triangles compared to coherent ones.
  • This finding contradicts the hypothesis that more microsaccades accompany visual binding.
  • The results indicate microsaccades are not a reliable marker for perceptual binding.

Conclusions:

  • Microsaccades do not reliably indicate perceptual binding.
  • Induced gamma band oscillations (iGBRs) are unlikely to be universally caused by ocular artifacts.
  • The role of gamma oscillations in visual object representation requires further investigation.