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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.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Visual Agnosia01:12

Visual Agnosia

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"...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of information more...
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Visual System

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Related Experiment Video

Updated: May 28, 2026

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Object features fail independently in visual working memory: evidence for a probabilistic feature-store model.

Daryl Fougnie1, George A Alvarez

  • 1Department of Psychology, Harvard University, Cambridge, MA 02138, USA. darylfougnie@gmail.com

Journal of Vision
|October 8, 2011
PubMed
Summary
This summary is machine-generated.

Working memory may not store objects as integrated units. Instead, features like color and orientation can be forgotten independently, challenging current memory models.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • The prevailing view posits that working memory stores information in an object-based manner, integrating features into unified objects.
  • This object-based model assumes that features of an object are stored and retrieved as a cohesive unit.

Purpose of the Study:

  • To investigate whether working memory storage is strictly object-based or if features can be represented and forgotten independently.
  • To challenge fundamental assumptions about the organization of information in human working memory.

Main Methods:

  • Participants were asked to recall specific features (color and orientation) of presented objects.
  • Analysis focused on the independence of memory errors for different features of the same object.

Main Results:

  • Memory errors for object features were found to be largely independent, contradicting the object-based memory model.
  • Even when one feature was completely forgotten, the other feature was often accurately recalled.
  • The degree of independence in feature storage correlated with the degree of neural coding overlap during perception, with jointly encoded dimensions showing less independence.

Conclusions:

  • Working memory may not exclusively store integrated objects; independent feature representations are plausible.
  • A novel framework of independent, self-sustaining feature representations that can fail probabilistically is proposed.
  • Neural coding overlap during perception influences the independence of feature storage in working memory.