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System of Memory

System of Memory

Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...

Sensory Memory

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,...

Chunking and Rehearsal in Sensory Memory

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...

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 each...

Long-Term Memory

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...

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Explicit memories, also known as declarative memories, are consciously remembered, recalled, and reported. Studying for a chemistry exam involves material that will become part of explicit memory. There are two types of explicit memory: episodic and semantic.
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Related Experiment Video

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The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition

Published on: February 19, 2018

Long-term memory is the representational basis for semantic verbal short-term memory.

Katherine A Cameron¹, Henk J Haarmann, Jordan Grafman

¹Department of Psychology, Washington College, Chestertown, Maryland 21210, USA.

Psychophysiology

|December 21, 2005

Summary

This study shows that semantic activation enhances verbal short-term memory retention. Activated long-term memory representations support this process, suggesting short- and long-term memory stores are not distinct.

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Area of Science:

Cognitive Neuroscience
Psychology

Background:

Activation models of verbal short-term memory propose a role for semantic processing.
Understanding the neural mechanisms of verbal short-term memory is crucial for cognitive science.

Purpose of the Study:

To investigate the semantic contribution to verbal short-term memory retention.
To examine the level of semantic activation during memory tasks using event-related brain potentials.

Main Methods:

Event-related brain potentials (ERPs) were recorded during two tasks: a short-term memory task with a semantic judgment and a nonmemory control task.
Semantic activation levels were measured during a delay interval following word presentation.

Main Results:

Semantic activation during the delay interval was significantly higher in the short-term memory task compared to the control task.
This indicates enhanced activation of semantic representations is integral to short-term verbal information storage.

Conclusions:

The findings support activation models of verbal short-term memory that incorporate semantic contributions.
Activated long-term memory provides a representational basis for semantic verbal short-term memory.
This challenges theories positing separate short- and long-term memory stores.