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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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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Transient perceptual neglect: visual working memory load affects conscious object processing.

Stephen M Emrich1, Hana Burianová, Susanne Ferber

  • 1University of Toronto, Toronto, Ontario, M5S 3G3, Canada. steve.emrich@utoronto.ca

Journal of Cognitive Neuroscience
|April 2, 2011
PubMed
Summary
This summary is machine-generated.

Conscious object perception relies on visual working memory (VWM) networks. High VWM load impairs object recognition, especially in the left visual field, highlighting VWM

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Visual Perception

Background:

  • Visual working memory (VWM) is crucial for complex cognition.
  • VWM networks may underpin conscious object perception.
  • Object recognition is sensitive to concurrent cognitive demands.

Purpose of the Study:

  • To investigate the role of VWM in object recognition.
  • To examine how VWM load affects visual object processing.
  • To identify neural networks supporting object recognition under VWM load.

Main Methods:

  • Multivariate functional magnetic resonance imaging (fMRI) was employed.
  • Participants performed object recognition tasks under varying VWM loads.
  • Hemifield object presentation was used to assess visual field asymmetries.

Main Results:

  • High VWM load impaired object recognition, particularly for left visual field stimuli.
  • Two distinct neural networks contributed to object recognition: VWM networks and ventral temporal lobe regions.
  • Activation within both networks predicted recognition performance.
  • A significant hemifield asymmetry in recognition performance was observed.

Conclusions:

  • Neural mechanisms supporting VWM are critical for conscious visual perception.
  • Object recognition involves both dedicated recognition areas and VWM-related regions.
  • Findings have implications for understanding visual neglect and visual processing asymmetries.