who proposed it and when
Atkinson and shiffrin 1968
sensory register capacity
high capacity
SR duration
less than half a second
SR encoding
visually(iconic) and acoustically (echoic)
STM capacity
limited, 5-9 items
STM duration
15-30 seconds
STM encoding
acoustically
LTM capacity
potentially unlimited
LTM duration
potentially unlimited
LTM encoding
semantically
evidence
baddeley - encoding in STM and LTM
Peterson and Peterson -duration in STM
HM
application
education
s/w
reductionist
ignores individual differences
mechanistic
artificial tasks
alternative
working memory