What defines a peg system in mnemonics?

The peg system in mnemonics is best defined as a technique involving pre-memorized words. This system works by associating information to be remembered with a set of predetermined "peg" words or numbers which are already stored in memory. For example, if a person has memorized the numbers one to ten with corresponding images (such as one - gun, two - shoe, etc.), they can then use these images to anchor new information. When trying to remember a list, you replace the peg words with the new information, creating a vivid mental image that helps recall.

This method leverages the familiarity and strong memory of the peg words, making it easier to retrieve the associated information when needed. The use of rhymes, visual aids, or group study sessions while useful in other contexts, are not specific characteristics of the peg system itself, which uniquely centers on this pre-established framework of words for memory retrieval.