multi-store model: atkinson and shiffrin

consists of

sensory memory, short term memory and long term memory

sensory store: function, encoding, capacity, duration, decay

info from environment enters store if paid attention to: encodes info in raw form, unlimited capacity, 1-2s duration, decays if there is lack of attention

short term memory: function, encoding, capacity, duration

temporary memory store: of info is rehearsed, it is transferred to ltm
encoded acoustically/verbally, 7(+/-2) capacity, 15-30s duration,

long term memory: function, encoding, capacity, duration

stronger memory as info is rehearsed: encoded semantically, potentially infinite capacity, potentially lifetime duration

ao3 : case studies

HM and Clive Wearing:
illustrate that LTM is more complex than suggested by the MSM, & is not a unitary store
HM was able to perform mirror drawing tasks better each time he performed them, despite having no recollection of doing the task before;
s suggests that LTM may have separate components: procedural, semantic, episodic memories

no prior knowledge of patients e.g. HM's memory deficits may have been due to his epileptic seizures & the medication he was taking for these; makes case studies less generalisable and reliable

ao3: brain scanning

Squire et al. (1993):
the hippocampus is more active in LTM tasks, whereas the prefrontal cortex is more active during STM task
MSM involves lab experiments which give a high level of scientific credibility

ao3 ca

- encoding in STM may not be just phonological/acoustic
- oversimplifies; doesn't explain how stm and ltm interact
- LTM must encode information acoustically, as well as semantically:
e.g., we recognise the sound of police sirens & ringing telephones and understand the meaning of the sounds