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Unformatted text preview: Psychology 202: Memory Lecture 2/27/2012 Memory- the retention of information overtime The curious case of HM (case study) o At age 11 started experiencing seizures, so doctor decides to remove parts of brain that causes the seizures (temporal lobes; hippocampus) o Caused severe memory problems- anterograde amnesia Couldnt find his house or hold conversation Able to learn new skills, but didnt remember learning it Connecting lines, mirror drawing, etc. Remembered information before his surgery o Insight: there are different types of memories, the hippocampus plays a role, but where else are they stored? The case of HM suggests: the hippocampus plays an important role in the consolidation of memories. The Nature of Memory 1) Information-Processing Model- Atkinson and Shiffrin Proposed there are three types of information processing: o Sensory memory- encoding o Working memory (short-term memory)- storage Rehearsal o Long-term memory retrieval o Inference and decay on all levels Sensory memory a memory of sensory events o EX. Still hearing a noise after a concert o Iconic memory- visual Lasts about half a second at the longest Helps maintain consistency in experiences o George Sperling interested in how long information could be stored Brief sight of letters, then sounding of a tone to let patients know what row to choose let them do better (in lecture) o Echoic memory- auditory A little longer than visual memory Short-term memory working memory o Memory span- the number of digits an individual can report after a single presentation 7 + or 2 (phone number) Held for about 10-20 seconds o Chunking- grouping of information into higher order units 10100100010000100000 10, 100, 1000, 10000, 100000 o Maintenance rehearsal- the conscious repetition of information that increases the time it stays in working memory. Long-term memory a relatively permanent type of memory o It is estimated that we can store 280 quintillion pieces of information 2) Working Memory Model Baddeley First information goes into sensory memory, and then it goes into long term memory (implicit or explicit), then working memory (central executive), which is made up of many different pieces....
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- Spring '06