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- In cognitive psychology, Brown–Peterson task (or Brown–Peterson procedure) refers to a cognitive exercise purposed for testing the limits of working memory duration. The task is named for two notable experiments published in the 1950s in which it was first documented, the first by John Brown and the second by husband and wife team Lloyd and Margaret Peterson. The task aims to test the quantity of objects that can be held in working memory while preventing participants from using mnemonics or other memory techniques separate from the working memory to increase recall capacity. In the experiment, participants view a sequence of three-letter constructs called trigrams, and are asked to perform simple algebraic computations such as counting backwards by 3s from 999 between each trigram. A trigram consists of 3 non-morphemic letters, the importance of which is that each letter represents a different independent object to be stored in working memory; therefore, trigrams avoid letter combinations that depict words or common acronyms. The algebraic computations are administered between trigrams to assure the participant isn't using mnemonic strategies to chunk the letters into a single object. Variants of the Brown–Peterson task are still used today, all with the same fundamental concept of administering items for the participant to remember whilst preventing the usage of additional cognitive resources to augment working memory. (en)
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- In cognitive psychology, Brown–Peterson task (or Brown–Peterson procedure) refers to a cognitive exercise purposed for testing the limits of working memory duration. The task is named for two notable experiments published in the 1950s in which it was first documented, the first by John Brown and the second by husband and wife team Lloyd and Margaret Peterson. (en)
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