capacity - STM
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Joseph Jacobs (1887)- digit span technique to assess STM capacity. Found average span for digits: 9.3 items. 7.3 for letters.
Therefore, its easier to recall digits as…
there's only 9 digits but 26 letters
George Miller (1956) - magic number 7+or-2. span of immediate memory is…
People counted no more than 7 dots flashed on screen.
People recall 5 words/letters as we chunk to remember more.
7 items sometimes more or less
AO3- Evaluation (STM appears limited.)
Endress + Szabo ( 2017) - no limits to remember info.
Inference from similar items alr in memory = appearance of limited capacity. e.g remembering new phone num
Therefore, STM can remember more than we think, but interference from…
earlier memories gives undeserved reputation of having limited capacity
AO3 - Evaluation
STM claims capacity 7+-2, research w deaf= only applies to auditory based, not visual.
Boutla (2004) - average STM capacity for ASL = 5+-2 items
Faster pronunciation rate in ASL than spoken english
Therefore, STM capacity may vary regarding the…
type of info coded and way its presented
Note 
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