The World of Work Project

Chunking and Chunking Limits

Chunking is the process of grouping small pieces of similar information together into a meaningful whole. The theory of chunking limits says that humans can only group seven or fewer things in this way, so we should create our communications accordingly. 

Summary by The World of Work Project

Chunking and Chunking Limits

Chunking is the psychological process of grouping similar pieces of information together into a meaningful whole. Humans do this to manage information when working and learning because it is easier to remember a single, high level, clustered group than each of its multiple components. Morse code is a great example of chunking in action. If you know Morse code you can remember a huge sequence of dots and dashes by simply remembering the letter that they relate to. 

The Chunking Limit is the names given to the fact that humans can only “chunk” a certain number of similar pieces of information together in their memory. Work has been done to assess how many pieces of information humans can typically chunk together, and the results suggest that it’s about seven (plus or minus two). What this means is that if people are asked to chunk more than seven things together, that they’ll probably not be able to do so.

Why do we care?

The chunking limit is relevant in the world of work specifically when we look at communicating or training.

The lesson we learn from the chunking limit is that we should try and group similar information together when communicating it to make it more memorable. However, we should never group more than seven similar types of information together as people won’t remember them. To be safe, we should probably never group more than five similar ideas together.

The key take away here for people is probably that if you end up with more than five points on a presentation slide, you should probably think about making it into two slides instead…

The World of Work Project View

We don’t have much to add. Chunking and chunking limits are important for communication theory (e.g. data compression programs use chunking), but provide only one really practical lesson for individuals work, which is that we need to keep our messages simple so that people will understand and remember them.

Sources and further reading

Where possible we always recommend that people read up on the original sources of information and ideas.

This post is based on original work by George A Miller. You can read more in his important and hugely sited article, “The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information“, which you can purchase here.


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