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chapter 28 - Chapter 28 Storage Retaining Information...

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Chapter 28 Storage: Retaining Information Sensory memory - Sperling`s experiment showed that we have a fleeting photographic memory called iconic memory --- for a few seconds our eyes register an exact representation of a scene and we can recall any part of it in amazing detail - We also have an impeccable though fleeting, memory for auditory stimuli called echoic memory ... Ie. If you`re not listening to someone and they ask you what they were talking about you will be able to recover the last few words from your minds echo chamber Working or Short term memory - Without active processing, short ter m m e m ories h ave a limited life Not only limited in duration but also capacity... typically storing 7 bits of inform ati (give or take 2) George miller e nshrined this recall capacity as the Magical Number Seven , plus or minus two Short term recall is better slightly for random digits (as in phone numbers) than for random letters which may have similar sounds Slightly better for what we hear rather than see Both children have short term recall for about roughly as many words as they can speak in 2 seconds Without rehearsal most of us actually retain in short term memory only about 4 information chunks Long Term Memory - Our storing long ter m m e m ories is ess entially limitless - We are reminded that m a ny psychological ph eno m e n a including m e m ory capacity ca studied by m e a ns of different levels of an alysis including biological Storing memories in the brain - Synaptic changes Looking for clues to the brains storage system, contemporary memory researchers have searched for a memory trace
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Chapter 28 Storage: Retaining Information Although the brain represents a memory in distributed groups of neurons, those nerve clls must communicate through their synapses Thus the quest to understand physical basis of memory has sparked study of the
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