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Related Concept Videos

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Related Experiment Video

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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Visual working memory representation as a topological defined perceptual object.

Ning Wei1, Tiangang Zhou1,2, Zihao Zhang1

  • 1State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.

Journal of Vision
|July 20, 2019
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Summary
This summary is machine-generated.

Visual working memory may use topological invariance as its basic unit. Changes in nontopological features did not affect memory, but topological changes reset it, suggesting a new object perception.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The fundamental unit of visual working memory (VWM) representation is a long-standing debate.
  • Previous research has explored various features like color, shape, and location.

Purpose of the Study:

  • To investigate whether topological properties serve as a basic unit for representation in VWM.
  • To propose a novel perspective on VWM representation based on early topological perception.

Main Methods:

  • Utilized updating change-detection tasks to assess memory performance.
  • Manipulated changes in both nontopological and topological features of visual items across memory arrays.

Main Results:

  • Repetition-benefit effects for color memory remained unaffected by substantial changes in nontopological features.
  • The repetition-benefit effect was abolished when topological properties of items changed, indicating perception as a new object.
  • This suggests topological invariance is crucial for maintaining object identity in VWM.

Conclusions:

  • Perceptual objects, defined by topological invariance, represent a fundamental unit in visual working memory.
  • This finding offers a unique perspective on how visual information is encoded and maintained in VWM.