What is meant by duration of short-term memory?
How long the short term memory (STM) can hold a piece of information
The multi-store model of memory was thought up by Atkinson and Shiffrin.
The sensory memory can hold information for less than a second and can take in one bit of information at a time. By paying attention it will go into the STM.
The STM can hold 7 (+/- 2) bit of information at a time and lasts less than a minute. Only if you rehearse it then it will go into the long term memory.
The long-term memory can hold unlimited parts of information and can last up to a lifetime.