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Miller's Magic Number

How much humans remember

In 1956, Harvard University-based psychologist George A Miller published a paper in journal Psychology Review that would give a fascinating insight into human memory and have implications far beyond the field of psychological research and impact on our everyday lives in way many people don't realize.

 

Miller was troubled for several years by the invasion of numbers - or specifically, integers - in his life. He set about to research just how much we can remember in our short-term memory. The widely-accepted multi-store model of memory acknowledges seperate stores of infroamtion in our memory that take the form of a short and long-term memory. As we remember with ease early childhood experiences, it's clear that the long term memory has a vast capacity that's difficult to measure in terms of capacity (how much can be stored) and duration, as it lasts a lifetime. The short term memory on the other hand is more limited, and Miller investigated its capacity.

 

Miller found that the short-term memory of different people varies, but found a strong case for being able to measure short-term memory in terms of chunks. A chunk can be a digit in part of a telephone phone number (but not a telephone number in a list of telephone numbers) or a name or some other single unit of information. His research lead him to discover a Magic Number Seven: most of the participants in his experiments were able to remember seven +- two chunks of information in their short term memory.

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Miller (1956): How many pieces of information can you remember? Miller's Magic Number, most likely.


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How does memory work?

Introducing the Multi-Store Model >>

 
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