0.1 Introduction to Memory

The Big Picture

Memory is more than simply remembering information. It involves several systems and processes that allow us to encode information, store it, and retrieve it later.

Psychologists use different models to explain how memory works. In this topic, you will be introduced to the major types of memory and three important models:

the Working Memory Model
the Multi-Store Model
the Levels of Processing Model

You will explore encoding, storage, retrieval, and forgetting in greater detail throughout the rest of Unit 0.

Types of Memory

Explicit Memory

Explicit memory is memory that you can consciously recall and explain to someone else. There are two major types:

Episodic Memory: Memory for personal experiences and specific events.

Example: Remembering your first day of high school.

Semantic Memory: Memory for facts, concepts, and general knowledge.

Example: Remembering that the capital of France is Paris.

Implicit Memory

Implicit memory is more automatic and can be difficult to explain in words.

Procedural Memory is a type of implicit memory involving skills and actions.

Example: Riding a bike or typing a text without consciously thinking through each movement.

Prospective Memory

Prospective memory is remembering to do something in the future.

Example: Remembering to submit an assignment tonight or attend an appointment tomorrow.

The Working Memory Model

Working memory is your brain's active mental workspace. It temporarily holds information while you use or manipulate it.

For example, solving a math problem in your head requires you to hold information in mind while also working with it.

The Working Memory Model includes several important components:

Central Executive

The central executive directs attention and coordinates the other parts of working memory.

It's like the conductor of the working memory system!

Phonological Loop

The phonological loop temporarily processes verbal and auditory information.

Example: Repeating a phone number in your head so you do not forget it.

Visuospatial Sketchpad

The visuospatial sketchpad temporarily processes visual and spatial information.

Example: Mentally picturing the route from your classroom to the cafeteria.

The Multi-Store Model

The Multi-Store Model explains memory as information moving through three different memory stores:

Sensory Memory → Short-Term Memory → Long-Term Memory

Sensory Memory

Sensory memory briefly holds raw information from your senses.

It lasts only a very short amount of time.

Two important types are:

Iconic Memory: brief visual memory
Echoic Memory: brief auditory memory

Short-Term Memory

Short-term memory temporarily holds a limited amount of information.

Information may disappear quickly unless it receives additional attention or processing.

Long Term Memory

Long-term memory stores information for extended periods of time and has a very large capacity.

Information in long-term memory can include facts, experiences, skills, and other forms of knowledge.

How Information Moves Through the System

Information can be processed in different ways:

Automatic Processing

Encoding that requires little conscious effort.

Effortful Processing

encoding that requires attention and conscious effort

Information that receives attention and meaningful processing is more likely to be stored in long-term memory.

The Levels of Processing Model

The Levels of Processing Model argues that how deeply information is processed affects how well it will be remembered.

The deeper the processing, the stronger the memory tends to be.

Structural Processing: Focuses on the physical appearance of information.

Example: Is the word written in capital letters?
This is shallow processing.

Phonemic Processing: Focuses on the sound of information.

Example: Does the word rhyme with another word?
This produces somewhat stronger memories than structural processing.

Semantic Processing: Focuses on the meaning of information and its connections to other ideas.

Example: Connecting a psychology term to something that has happened in your own life.
This is the deepest level of processing and generally produces the strongest memories.

The Biology of Memory: Long-Term Potentiation

Memory also involves physical changes in the brain.

Long-Term Potentiation (LTP) occurs when repeated activation strengthens the connection between neurons.

When neurons repeatedly fire together:

communication between them becomes stronger
neural pathways become more efficient
synaptic changes can support long-term memory

This is one biological explanation for how learning and memory become more permanent.

A helpful way to remember LTP is: Repeated neural activity strengthens the connection.

Tips for the Exam

Memory questions often require you to apply a concept to a scenario, not simply memorize a definition.

You may need to determine whether a person is using:

episodic memory
semantic memory
procedural memory
prospective memory

You may also be asked to identify which memory model is being described.

Know Which Concepts Belong to Each Model

Working Memory Model

Central Executive
Phonological Loop
Visuospatial Sketchpad

Multi-Store Model

Sensory Memory
Short-Term Memory
Long-Term Memory
Iconic Memory
Echoic Memory

Levels of Processing Model

Structural Processing
Phonemic Processing
Semantic Processing

If a question describes neurons repeatedly firing and forming stronger connections, think Long-Term Potentiation.

Common Misconceptions

Explicit vs. Implicit Memory

These terms do not describe how strong a memory is.

Explicit memory is consciously recalled and can usually be described.
Implicit memory operates more automatically and may be difficult to put into words.

Episodic vs. Semantic Memory

Both are forms of explicit memory.

Episodic = episodes from your life
Semantic = facts and meanings

Short-Term vs. Working Memory

Short-term memory focuses on holding information briefly.

Working memory focuses on holding and actively manipulating information.

Sensory vs. Short-Term Memory

Sensory memory is the extremely brief first stage that holds raw sensory information.

Short-term memory holds information longer so that it can be consciously processed.

Deep Processing vs. More Time

Deep processing does not simply mean studying something longer.

Semantic processing works because you think about the meaning of the information and connect it to other knowledge.

Key Takeaways

By the end of Topic 0.1, you should know that:

Explicit memory involves conscious recall.
Episodic memory stores personal experiences.
Semantic memory stores facts and general knowledge.
Procedural memory is implicit memory for skills and actions.
Prospective memory involves remembering future tasks.
Working memory actively holds and manipulates information.
The Multi-Store Model includes sensory, short-term, and long-term memory.
Iconic memory is visual sensory memory, while echoic memory is auditory sensory memory.
The Levels of Processing Model predicts that deeper, semantic processing creates stronger memories.
Long-Term Potentiation strengthens neural connections through repeated activation.

Slides

U0L1: Introduction to Memory Slides

Lesson 1: Introduction to Memory

0.1.A Explain how the types, structures, and processes of memory work.

0.1.A.1 Differentiation of Memories

0.1.A.1.I Explicit Memories

0.1.A.1.II Implicit Memories

0.1.A.1.III Prospective Memories

0.1.A.2 Long-Term Potentiation

0.1.A.3 The Working Memory Model

0.1.A.4 The Multi-Store Model

0.1.A.5 The Levels of Processing Model

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