What is the difference between working memory and short-term memory?
The short answer
These terms are often used interchangeably in everyday speech, but cognitive scientists draw a clear distinction. Short-term memory is a passive storage buffer; working memory is an active processing system.
The data
| Feature | Short-term memory | Working memory |
|---|---|---|
| Function | Passive storage | Active storage + manipulation |
| Duration | ~15–30 seconds | As long as task requires |
| Capacity | ~7 items (Miller) | ~4 chunks (Cowan) |
| Manipulation | No — just holds info | Yes — transforms and uses info |
| Clinical relevance | Less used in modern research | Central to cognitive assessment |
| Test example | Hear a number, repeat it | Hear numbers, repeat them backwards |
What it means for you
The modern scientific consensus, represented by Baddeley's model, treats working memory as the broader and more clinically meaningful construct. Short-term memory is essentially the storage component of working memory. Take the Number Memory test to measure your forward digit span (primarily short-term) and see how it compares to the population.
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Quick Answer
Short-term memory passively stores information briefly. Working memory actively manipulates it. Working memory is the more powerful and predictive construct in modern cognitive science.
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