memory
- Created by: jessicafield-98
- Created on: 13-04-15 12:06
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- DURATION
- STM
- events in present or immediate past
- LLoyd & Margaret Peterson (1959)
- 24 students at university
- nonsense trigrams plus 3 digits
- count back in 3s until told to stop then recalled
- retention interval increased each time - 3 6 9 12 15 secs
- 90% recall with 3 sec interval; 2% with 18 sec
- when rehearsal is prevented STM lasts approx. 20 secs at most
- LTM
- memories that last from 2 hours to 100 years
- Shepard (1967)
- ppts shown 612 memorable pics 1 at a time
- shown with others pics 1 hour later - almost perfect recall
- still able to recognise 50% 4 months later
- NATURE OF MEMORY
- CAPACITY
- Joseph Jacobs (1887)
- digit span technique
- avg. digit span 9.3 - avg. letter span 7.3
- only 9 digits but 26 letters
- increasing capacity
- magic number 7+/-2 (Miller 1956)
- chunking
- Simon (1974) - shorter mem span for larger chunks (e.g 8 word phrases) than 1 syll. words
- Joseph Jacobs (1887)
- ENCODING
- acoustic
- coding in terms of how info sounds
- semantic
- coding in terms of infos meaning
- Baddeley (1966)
- gave ppts words acoustically sim of diff and words semantically sim or diff
- ppts found it hard to remember acoustically sim in STM not LTM
- semantically sim no problem in STM but muddled LTM
- visual codes also in STM - visual task and recall and verbal distractor
- forced to use visual coding because acoustic was prevented
- acoustic
- CAPACITY
- STM
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