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Related Concept Videos

Sensory Memory01:14

Sensory Memory

1.0K
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,...
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Storage01:23

Storage

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Working Memory01:24

Working Memory

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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...
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Visual System01:26

Visual System

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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...
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Vision01:24

Vision

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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.
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Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

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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...
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Related Experiment Video

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Eye Movement Monitoring of Memory
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Accurate metacognition for visual sensory memory representations.

Annelinde R E Vandenbroucke1, Ilja G Sligte, Adam B Barrett

  • 11Cognitive Neuroscience Group, Department of Psychology, University of Amsterdam.

Psychological Science
|February 20, 2014
PubMed
Summary
This summary is machine-generated.

People feel they see more than they can attend to. This study shows sensory memory accurately reflects visual perception richness, suggesting this feeling isn't illusory.

Keywords:
attentionconsciousnessdecision makingsubjectivevisual memoryvisual short-term memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Limited capacity to attend to multiple visual objects contrasts with the subjective feeling of perceiving the entire visual field.
  • Debate exists whether this feeling stems from short-lived sensory memory or is an illusion.

Purpose of the Study:

  • Investigate the basis of the subjective feeling of seeing more than can be attended to.
  • Examine the relationship between objective memory performance and subjective confidence.
  • Assess metacognition across different memory stages.

Main Methods:

  • Employed a change-detection task combining objective memory performance with subjective confidence ratings.
  • Calculated metacognition as a measure of decision-making accuracy knowledge.
  • Analyzed metacognitive performance for sensory memory and working memory.

Main Results:

  • Subjects stored more objects in sensory memory than they could attend to.
  • Metacognition for sensory memory and working memory representations were found to be similar.
  • Objective performance and subjective confidence aligned across memory stages.

Conclusions:

  • The subjective impression of seeing more than can be attended to is not illusory.
  • Sensory memory representations accurately reflect the richness of visual perception.
  • Metacognition provides insight into the fidelity of subjective visual experience.