this would mean we are
unable to remember
words longer than 9
letters
so miller said out stm can
hold 7+-2 chunks of
information, and personal
experience would determine
what was a meaningful chunk
the recency effect
you remember the
most recent chunks
more than others
this is not always the case
long term memory
the capacity is hard to measure
it seems to be infinite
some people seem to be able to recall
lots of detail for many years, other
people not so much
duration
short term memory
Peterson & Peterson
used trigrams to test
stm duration
found worse recall
after longer delay
memory in stm is
fragile and easily
forgotten
lacks mundane realism
doesn't account for the
duration of pictures, sounds or
smells
long term memory
Bahrick et al
found 90% accuracy for recalling faces
and names 34 years after leaving
school, and 80% accuracy for names
and 40% for faces 48 years after leaving
school
ltm duration is possibly infinite
hard to test = just because you can't
think of something at the time doesn't
mean its been forgotten
encoding
Baddeley
stm is acoustic coding
worse recall if the words sound similar
ltm is semantic coding
worse recall if words have similar meanings
did not take account of visual cues
Posner
said that visual information is important.
it is easier to identify A and A as being
the same as A and a
evaluation
strengths
defines stm and ltm
evidence from different encoding
definite differences in capacity
between stm and ltm
different durations in stm and
ltm been proven
weaknesses
overemphasis on rehearsal.
maybe in lab but too consciously
in real life
lacks description. how does info
go from acoustic to semantic
coding?
info probably contacts ltm before
rehearsal in stm, this is not explained
by model