associated with a specific topic in a way that made them easy to remember and
to communicate to others.
Little did I know it at the time, but this technique is similar to chunking, which is
a well-known mnemonic technique first described by the American psychologist
George Armitage Miller (1920–2012) in 1956. The term came from Miller’s
famous paper “The Magical Number Seven, Plus or Minus Two”, in which he
explained how the short-term memory can only store seven items of information
efficiently. Miller then described how a technique such as chunking can be used
to extend memory span.
As I developed the Mind Map, I saw how chunking could play a useful role in
certain circumstances. In Mind Mapping, the outline of a boundary creates a
unique shape of its own, making it memorable in its own right, as well as
grouping information in a way that suits the workings of the short-term memory.
Boundaries and chunking can be especially helpful when creating intricate Mind
Maps that cover a variety of topics with many different levels of information.
However, boundaries and chunking should be applied sensitively to Mind Maps,
as there is a delicate balance at work. If a Mind Map is still a work in progress,
every extending branch needs to be “open” and free to make new connections. If
a branch is outlined with a boundary too soon, the Mind Mapper will potentially
place themselves in a restrictive prison.
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