memory basics
coding, capacity, duration
- Created by: Humanur
- Created on: 04-06-21 19:07
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- memory basics
- coding
- the different formats the brain uses to store information
- Baddeley (ltm and stm): used word lists to examine how poeple remebered those lists
- he found when using stm they relied on acoustic but while using ltm they tended to use semantic
- strength: identifies a clear difference between the two memory stores, limitation: limited application due to artificial stimuli
- Baddeley (ltm and stm): used word lists to examine how poeple remebered those lists
- the different formats the brain uses to store information
- capacity
- the amount information that can be in a memory store
- Jacob(stm): concluded participants could only remember up to 9 numbers or 7 letter
- strength: replicated, limitation: over stimulated stm capacity
- Miller(stm); also concluded that the stm capacity is 7+/-2
- Jacob(stm): concluded participants could only remember up to 9 numbers or 7 letter
- the amount information that can be in a memory store
- ltm
- this is a permanent memory store, coding is done semantically, it has unlimited capacityand is thought that items can be retained here for a lifetime
- duration
- the amount of time a memory store can hold onto information
- Peterson and Peterson(stm): gave participants nonsense trigrams(eg 2tr) and got them to count backwards from 100 (so they couldnt rehearse)
- 90% of trigrams were recalled after 3 seconds but after 18 seconds only 5%
- they concluded the stm duration is 20-30 seconds
- limitation: artificial stimuli
- 90% of trigrams were recalled after 3 seconds but after 18 seconds only 5%
- Bahrick et al(ltm): 392 participants, age 17-74 tested for memory of old photos and names of their school friends
- recall in matching names to faces were 90% accurate in ages after 15yrs and 80% after 48yrs
- this suggeststhe duration of the ltm is very large, potentially limitless
- strength: high external validity becuase he uses meaningful memories
- recall in matching names to faces were 90% accurate in ages after 15yrs and 80% after 48yrs
- Peterson and Peterson(stm): gave participants nonsense trigrams(eg 2tr) and got them to count backwards from 100 (so they couldnt rehearse)
- the amount of time a memory store can hold onto information
- stm
- the memory store has a limited capacity and duration,coding is typically acoustic and the capacity is between 5-9 items
- coding
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