The Atkinson-Shiffrin Model is a three-store model of memory in Intro to Cognitive Science: sensory memory, short-term memory, and long-term memory. It explains how information moves, gets rehearsed, and is sometimes forgotten.
The Atkinson-Shiffrin Model is a classic memory model in Intro to Cognitive Science that breaks memory into three stages: sensory memory, short-term memory, and long-term memory. Instead of treating memory as one single system, it shows information moving through a sequence, with each store doing a different job.
First, sensory memory catches raw input from your senses for a tiny slice of time. A sound, image, or touch leaves a brief trace, but most of it fades almost immediately unless you pay attention to it. That attention step matters because it is the gateway into short-term memory.
Short-term memory is the small workspace where you hold information for active use. In the classic model, it has a limited capacity, often summarized as about 7 plus or minus 2 items, though modern cognitive science treats that number as a rough older estimate rather than a hard law. If you try to keep too much in mind at once, some of it drops out.
The model says rehearsal is one main route from short-term memory into long-term memory. Rehearsal can be simple repetition, like silently repeating a phone number, or more elaborate, like linking a new idea to something you already know. The more deeply you work with the material, the more likely it is to stick.
Long-term memory is the more durable store, where information can last from minutes to years. Once something is there, you still need retrieval to bring it back into awareness. The model is sequential, but it is not a perfect recording machine, because forgetting can happen at any step if attention fails, rehearsal stops, or retrieval cues are weak.
In cognitive science, this model is useful because it gives you a clean way to describe the flow of information in the mind. It also connects directly to the Cognitive Revolution, when researchers started asking what happens inside the black box instead of only measuring visible behavior.
This model is one of the easiest ways to explain how early cognitive science started thinking about the mind as an information-processing system. It gives you a step-by-step framework for describing memory, which fits the broader shift away from behaviorism and toward internal mental processes.
You will see it again whenever a class asks why something was remembered, forgotten, or only briefly noticed. If a person hears a sound but does not attend to it, the problem may be in sensory memory. If they can hold a few facts just long enough to use them but lose them quickly, that points to short-term memory. If a repeated idea later shows up in recall, that is evidence of long-term storage.
It also gives you a baseline for later critiques. Many newer models add working memory, attention control, and richer connections between memory systems, so the Atkinson-Shiffrin Model often shows up as the starting point you compare other theories against. In Intro to Cognitive Science, that makes it a bridge between history and mechanism.
Keep studying Intro to Cognitive Science Unit 2
Visual cheatsheet
view gallerySensory Memory
Sensory memory is the first stop in the Atkinson-Shiffrin Model. It holds a very brief trace of what you see, hear, or feel before attention decides what gets passed on. If a sound or image disappears almost instantly, that is sensory memory doing its short-lived job rather than long-term forgetting.
Short-Term Memory
Short-term memory is the mental workspace in the model, where information stays available for a short time and limited amount of active use. In cognitive science discussions, this is the stage you point to when someone can hold a number, sentence, or instruction just long enough to act on it. It is also the stage most affected by distraction.
Long-Term Memory
Long-term memory is the store the model treats as relatively stable and durable. Information gets there through rehearsal or deeper processing, then can be retrieved later for recall, recognition, or problem solving. When a class example asks why one idea lasted from yesterday’s lecture while another vanished, long-term memory is part of the answer.
Information Processing Model
The Atkinson-Shiffrin Model is a classic example of the Information Processing Model because it treats the mind like a system that receives, stores, and retrieves information in stages. That makes it useful in Intro to Cognitive Science when you are comparing memory to computer-like processes, input, storage, and output.
A quiz question may ask you to label the memory store in a scenario, like deciding whether a flash of a phone screen, a held-in-mind code, or a remembered fact belongs to sensory memory, short-term memory, or long-term memory. An essay prompt may ask you to explain how rehearsal moves information forward or why forgetting can happen before something ever reaches long-term memory. You might also be asked to compare this model with newer ideas about working memory or to explain why cognitive scientists saw it as a break from behaviorism. The safest move is to trace the path of information step by step and use the correct store names, not just the general idea of memory.
These are closely related, but they are not the same thing. The Information Processing Model is the broad idea that the mind handles information in stages, while the Atkinson-Shiffrin Model is one specific version of that idea focused on memory stores. If a question asks about memory stages, use Atkinson-Shiffrin. If it asks about the general computational view of the mind, the broader model fits better.
The Atkinson-Shiffrin Model breaks memory into sensory memory, short-term memory, and long-term memory.
It explains memory as a flow of information, not as one single storage box in the mind.
Attention moves information out of sensory memory, and rehearsal helps push it from short-term memory into long-term memory.
Forgetting can happen at any stage, especially when attention is weak or rehearsal stops too soon.
In Intro to Cognitive Science, the model shows the shift from behaviorism toward studying internal mental processes.
It is a three-store model of memory that describes sensory memory, short-term memory, and long-term memory. The model explains how information is noticed, held briefly, and sometimes stored more permanently through rehearsal.
Forgetting can happen if information never gets enough attention to leave sensory memory, if it drops out of short-term memory, or if it is not rehearsed enough to enter long-term memory. The model treats memory loss as a problem at multiple stages, not just one.
No. The Atkinson-Shiffrin Model is the older multi-store model with sensory, short-term, and long-term memory. Working memory is a later, more detailed idea that focuses on how short-term storage and mental manipulation happen together.
You identify which memory stage a situation describes and explain the movement of information between stages. If the prompt includes repetition, attention, or quick loss of information, those clues usually tell you which store is involved.