Coding, capacity and duration of memory

Coding – the format in which info is stored in the various memory stores.
Capacity – The amount of info that can be held in a memory store.
Duration- the length of time info can be held in memory
STM – coding is acoustic Capacity between 5 and 9 Duration between 18 and 30 seconds
LTM – coding is mainly sematic Unlimited capacity Stores memory up to life time
Multi store model – representation of how memory works in terms of three stores – sensory register- STM – LTM Describes how info is transferred from one store to another , how it is remembered and forgotten

Multi- store model Atkinson and Shiffrin’s ( 1968 , 1971)
Three stores
Sensory register Stimulus from environment will pass into sensory register Main stores are iconic memory ( visual memory ) ( coded visually ) Echoic memory ( sound memory ) ( coded acoustically ) Memory lasts only briefly duration is less than half a second High capacity Key processes is paying attention

Short term memory limited capacity capacity is between 5 and 9 items info is coded acoustically lasts about 30 secs unless rehearsed maintenance rehearsal – occurs when we repeat material if rehearsed long enough it will go into the LTM
Long Term Memory capacity is unlimited memory can last many years When we want to recall memory it has to be transferred back into STM by retrieval.

Evaluation + Baddeley research shows STM and LTM are stored are different. He found we tend to mix up words that sound similar when we our using our STMs. But we mix up words that have similar meanings when we use our LTMs.
+ The strength of the study is that it clearly shows coding in STM is acoustic and in LTM is semantic.

There is more than one type of STM MSM says there is