What is the difference between working memory and short-term memory?
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.
| 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 |
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.
Test your working memory
Free — no account needed — results in 2 minutes.
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.
Related Test
More Questions
Go deeper
The Science Page
Peer-reviewed research and full methodology.