What Is Memory in Psychology?
Memory is how the brain encodes, stores, and later retrieves information — from remembering a friend's name for a few seconds to recalling childhood events decades later. Psychologists commonly describe it using the multi-store model of memory.
Memory is the mental process of encoding, storing, and retrieving information, commonly modeled in three stages: sensory memory, short-term (working) memory, and long-term memory, each differing in duration and capacity.
- 1↓Sensory MemoryHolds raw sensory information (sight, sound) for less than a second to a few seconds.
- 2↓Short-Term MemoryHolds a limited amount of information (about 7±2 items) for roughly 15–30 seconds unless rehearsed.
- 3Long-Term MemoryStores information with essentially unlimited capacity and duration, from minutes to a lifetime.
Step-by-step worked examples
You look up a phone number, repeat it to yourself, and dial it, but forget it a minute later. Which memory stage was primarily used?
The number entered sensory memory briefly when you read it Repeating it kept it active in short-term memory Without further rehearsal or meaningful encoding, it decayed and was not transferred to long-term memory
You can vividly recall your childhood home's layout even though you haven't visited in 15 years. Which memory stage stores this information?
The information was encoded and rehearsed enough times during childhood to be stored It was transferred into long-term memory Long-term memory has no strict time limit, so it can be retrieved decades later
A student uses spaced repetition (reviewing flashcards over several days) instead of cramming the night before an exam. Why is this more effective for memory?
Cramming keeps information mostly in short-term memory, which decays quickly Spaced repetition forces repeated retrieval and re-encoding over time This strengthens the neural connections needed to move information into stable long-term memory
Flashcards
Quick quiz
Q1.What are the three stages of memory in the classic multi-store model?
Q2.Without rehearsal, how long does information typically last in short-term memory?
Q3.What does 'encoding' mean in the context of memory?
Q4.Which type of memory has essentially unlimited storage capacity?
The full card deck, worked steps and AI-tutor support for “What Is Memory in Psychology?” are in Notek — study by hand before your exam.
Common mistakes
Treating short-term memory and working memory as completely identical concepts. — Correct: They are closely related, but working memory specifically emphasizes actively manipulating information (e.g., doing mental math), not just holding it briefly.
Assuming forgetting only happens because memories simply 'fade away' over time. — Correct: Forgetting can also result from interference (other memories blocking access) or retrieval failure, not just decay.
Believing memory works like a video camera, recording events with perfect accuracy. — Correct: Memory is reconstructive — each time we recall something, it can be subtly altered, distorted, or filled in with assumptions.
Assuming all information you experience automatically becomes a long-term memory. — Correct: Most sensory input is never encoded into long-term memory; it requires attention, rehearsal, or meaningful processing first.
FAQ
What is memory?
Memory is the mental process of encoding, storing, and retrieving information, allowing us to learn from and recall past experiences.
What are the stages of memory?
The classic multi-store model describes three stages: sensory memory, short-term (working) memory, and long-term memory.
What is the difference between short-term memory and long-term memory?
Short-term memory holds a small amount of information for about 15–30 seconds; long-term memory can store vast amounts of information for years or a lifetime.
How can I improve my memory?
Techniques like spaced repetition, active recall, meaningful association, and good sleep all strengthen encoding and help move information into long-term memory.