Psychology 10_3 - Psychology 10/3/2007 12:52:00 PM 10/3 HM:...

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Psychology  03/10/2007 11:52:00 10/3 HM : he couldn’t learn anything new, severe epilepsy.  Seizures, trial operation  brain surgery 1953 (age 27) Couldn’t recollect who the President of the United States was. Had to pay with a case of amnesia Medial Temporal Lobe  o The doctor removed much of it during operation, and  removed/damaged hippocampus Helped scientists understand how and where brain functions  Profound (anterograde) amnesic He could remember events of 1929 (stock market crash) (“n” of one) After 1953 he can remember some things (1963 assassination of Kennedy) Doesn’t know who people are but can associate first and last names with  others Declarative Memory : being able to recall (I remember I had cereal for  breakfast) Non-declarative Memory : not conscience memories (riding bike, tying shoe) Many memory systems not just one (categorized) Encoding memories Processing/transforming incoming info in order to use it or store it Storing memories The retention of that memory
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Retrieving memories Accessing info from memory THREE STAGE MODEL OF MEMORY (Atkinson and Shiffrin, 1968) Sensory Input --  (BOTTOM-UP)   sensory memory –  (attention and pattern recongnition)     short term or working memory  (on top: rehearsal, arrowed below: response)  --  (encoding)   (rehearsal)  --   long term memory  (CONCEPTUALLY DRIVEN— arrow  back to  sensory memory TOP-DOWN) Each type of memory store is distinct o How long info is received (shortest to longest) o How info is processed From sensory input to sensory memory   bottom up (what you see is what you  get) SENSORY MEMORY Icon: brief visual memory Echo: brief auditory memory Bottom-up process (stimulus driven) Can’t repeat or remember voices (DECAY-arrowed down from sensory  memory) Large capacity but lasts only seconds Auditory is longer than visual Not usually conscious Rapid decay is adaptive [so you wouldn’t get overwhelmed] Sensory info is unprocessed (not assigned meaning) at this stage
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SHORT TERM MEMORY Lasts several seconds up to 30 seconds with rehearsal Limited capacity (7+- 2) or maybe only 4 chunks Chunking (recoding) Acoustic coding dominates Studies of attention duration and forgetting: o If we don’t rehearse info in STM it is lost within 20 seconds or so o Is this due to decay or interference? Unresolved!! Decay: being lost   Interference: being pushed out
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This note was uploaded on 04/06/2008 for the course PSYC 10400 taught by Professor Scheibe during the Fall '08 term at Ithaca College.

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Psychology 10_3 - Psychology 10/3/2007 12:52:00 PM 10/3 HM:...

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