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関連する概念動画

Vision01:24

Vision

48.6K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
48.6K
Visual System01:26

Visual System

2.3K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
2.3K
Color Vision01:24

Color Vision

2.0K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
2.0K
Perceptual Constancy01:12

Perceptual Constancy

1.8K
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...
1.8K
Working Memory01:24

Working Memory

1.3K
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...
1.3K
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

818
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...
818

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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

7.9K

ビジュアルワーキングメモリにおける固定解像度の離散表現

Weiwei Zhang1, Steven J Luck

  • 1Department of Psychology, University of Iowa, Iowa City, Iowa 52242, USA. wwzhang@ucdavis.edu

Nature
|April 4, 2008
PubMed
まとめ
この要約は機械生成です。

作業記憶の容量は,私たちが保持できる情報の量を制限します. この研究は,ワーキングメモリが柔軟なリソースプールではなく,いくつかの高解像度表現を格納していることを明らかにし,認知科学における長年の議論を解決しました.

さらに関連する動画

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

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関連する実験動画

Last Updated: May 3, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
05:58

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

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科学分野:

  • 認知心理学とは,認知心理学である.
  • 神経科学は神経科学である.
  • 人間の知覚は人間の知覚です.

背景:

  • 作業記憶容量は,認知機能を制限する.
  • 作業メモリが離散表現を使用するか,または柔軟なリソースプールを使用するかどうかについては,議論があります.
  • これらの限界を理解することは,認知能力の研究にとって極めて重要です.

研究 の 目的:

  • 作業メモリ容量制限に関する論争を解決するために.
  • 作業メモリが固定的解像度の表現を格納しているか,または柔軟なリソースプールを格納しているかどうかを判断する.
  • 作業記憶容量と解像度の独立した測定を提供すること.

主な方法:

  • オブジェクトのプレゼンテーションとメモリリコールに関する実験的操作.
  • 作業記憶容量と表現解像度の独立した測定.
  • オブジェクトセットのサイズに基づいてメモリパフォーマンスの分析.

主要な成果:

  • 人間の観察者は,複数のオブジェクトが提示されたときに,オブジェクトのサブセットの高解像度表現を保存します.
  • 選択されていないオブジェクトに関する情報は保持されません.
  • メモリ解像度は,一般的なリソースプールモデルと矛盾する限られた変動性を示しました.

結論:

  • 作業メモリは,離散的,固定解像度の表現で動作します.
  • 発見は,柔軟なリソースプールではなく,限られたセットのモデルを支持しています.
  • これは,作業メモリ容量の制限の性質を明確にします.