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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.
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"...
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...
Sensory Memory01:14

Sensory Memory

Sensory memory captures information from the environment in its original form for a very brief duration, just long enough to be exposed to visual, auditory, and other senses. This type of memory is detailed and rich but quickly lost unless certain strategies are employed to transfer it into short-term or long-term memory. Sensory information is continuously bombarding the human brain, yet only a small fraction is absorbed, as most of it does not significantly impact daily life. For instance,...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

Updated: May 21, 2026

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
11:15

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Published on: February 20, 2014

Visual working memory for amplitude-modulated shapes.

Viljami R Salmela1, Meri Lähde, Jussi Saarinen

  • 1Institute of Behavioural Sciences, P.O. Box 9, FI-00014 University of Helsinki, Finland. viljami.salmela@helsinki.fi

Journal of Vision
|June 5, 2012
PubMed
Summary
This summary is machine-generated.

Visual working memory capacity and precision involve a linear trade-off. Increasing the number of items linearly increases thresholds, demonstrating a continuous relationship rather than a performance breakdown.

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Related Experiment Videos

Last Updated: May 21, 2026

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
11:15

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Published on: February 20, 2014

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Visual working memory (VWM) is crucial for cognitive tasks.
  • Understanding the limits of VWM capacity and precision is essential.
  • Previous research suggests potential trade-offs within VWM storage.

Purpose of the Study:

  • To investigate the relationship between capacity and precision in VWM.
  • To determine how performance changes with increasing memory load.
  • To examine the nature of the trade-off using different experimental paradigms.

Main Methods:

  • Utilized two tasks: delayed discrimination and recall.
  • Employed radial frequency patterns as visual stimuli.
  • Measured amplitude thresholds using a two-interval, forced-choice setup with the Quest procedure.
  • Assessed recall precision by having observers match stimulus amplitude.

Main Results:

  • Low thresholds and precise adjustments were observed for single items.
  • Increasing memory load from one to six items linearly increased thresholds (6-14 fold) and standard deviations (1.5-3 fold).
  • No abrupt performance decline was observed across subjects.

Conclusions:

  • A continuous, linear trade-off exists between VWM capacity and precision.
  • Stimulus discriminability is a key determinant of VWM capacity.
  • VWM performance can be maintained across different memory loads by adjusting stimulus discriminability.