Mnemonic peg system
Mnemonic peg system
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Mnemonic peg system

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Mnemonic peg system

The mnemonic peg system, invented by Henry Herdson, is a memory aid that works by creating mental associations between two concrete objects in a one-to-one fashion that will later be applied to to-be-remembered information. Typically this involves linking nouns to numbers and it is common practice to choose a noun that rhymes with the number it is associated with. These will be the pegs of the system. These associations have to be memorized one time and can be applied repeatedly to new information that needs to be memorized.

The rhyming peg-word system is very simple, as stated above and could look something like this:

For example, to remember the first 8 digits of Pi, using the major system as well:

The next step is to link the items with some sort of dramatic action, in order to record the order in which they appear.

The less likely you are to have seen the scene in real life, the more likely it is to make a reliably retrievable impression.

While it is common to link rhyming nouns with numbers, that is by no means the only system. There is also the major system, which connects sounds to numbers. The major system is more complicated to learn than simple rhymes or alphabetic pegs, because it associates numbers 0-9 with a specific letter or sound, then larger numbers can combine to create words out of the sounds. It is limitless in the number of pegs it can produce. The most common association between numbers and letters is the following:

This would make the number 33 "MM" which could be made into the word "mom" to better aid in memorization or 92 is "PN" and could become "pen." "Cat" (or "cut") would correspond to 71, as vowels do not have any value.

The person-action-object (PAO) system is the most complex. It associates all numbers 00-99 with a distinctive person, action and object. Any six-digit number can be memorized by using the person assigned the first two digits, the action of the next two digits and the object of the third. For example:

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