Adam Steel - Neuroscientist
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Memory compression strips content

1/10/2018

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Huang & Awh (2018) demonstrate through 4 experiments that memories are chunked in a manner that removes their content. This phenomenon explains why we are better at remembering a group of things (objects or letters for example) that make sense together (like a word, in the case of letters), even though it might take a little longer.  A good example of this is presented in the paper. 

"... Someone remembering the string “internationalizationcongratulationmisinterpretation” would probably agree that they are not holding online individuated representations for each letter in this string, even if every letter could be recalled perfectly given sufficient time.  ... [but] it is not obvious whether the memory of a “Belgium flag” contains the active representation of the three colors or not, or the memory of a word “dog” contains active representations of the three letters or not. (Huang & Awn 2018).
My hot take is that this is an interesting paper that explains a phenomenon of human behavior that we take for granted. Indeed, it also makes sense in the sequence learning literature, where once a movement (like a dance) has been mastered, it may be hard to execute a particular aspect of the movement in isolation. The movement is stored as a chunk, and the individual components, like the letters in the example above, become separate from the whole.

Ref: ​https://www.nature.com/articles/s41598-017-18157-5

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