Psychology
Short-Term vs Long-Term Memory
Memory isn’t one thing. A brief, limited store holds what you’re thinking about right now, while a vast, durable store keeps what you’ve learned for a lifetime.
| Aspect | Short-term memory | Long-term memory |
|---|---|---|
| Duration | Seconds to about a minute | Hours to a lifetime |
| Capacity | Very limited (a handful of items) | Effectively vast |
| Role | Holds and manipulates current information | Stores knowledge and experiences |
| Fragility | Easily lost if not rehearsed | More durable, though it can fade or distort |
| Example | Holding a phone number long enough to dial | Remembering your childhood home |
When to use short-term memory
Short-term (or working) memory is the small, temporary workspace for information you’re actively using right now — like a number you’re about to dial.
When to use long-term memory
Long-term memory is the durable store for knowledge, skills, and experiences that can last for years or a lifetime.
Frequently asked questions
- How much can short-term memory hold?
- A classic estimate (George Miller, 1956) was "seven plus or minus two" items, though modern research suggests the reliable number is often smaller (around four) and depends on the material and on "chunking" information into meaningful units.
- How does information move to long-term memory?
- Through processes like rehearsal, meaningful encoding, and consolidation (often during sleep). Techniques such as retrieval practice and spaced repetition strengthen the transfer, which is why they’re powerful study tools.
- What’s the difference between short-term and working memory?
- They’re closely related and often used interchangeably. "Working memory" emphasises actively manipulating information (not just holding it), while "short-term memory" emphasises brief storage. Both are limited and temporary.