Baddeley (1966): Four trials, for ps,
to learn the order of a list of words.
Then used 20-minute delay asked
ps to recall as many words as
possible in order. Compared 5th
score with 4th score 20 minutes
earlier to see how much they had
forgotten. Ps’ STM was helping
their LTM out, working together.
He carried out a second test. Ps
performed an interference task
after. Worked - cancelled out STM -
ps were only using LTM to recall.
STM
Conrad (1964): Found most
recall errors could be due to
sound of letter. Few errors were
made if sounds were very
different. Suggests STM codes
acoustically
Mainly acoustic, but
can be recoded if
visual and semantic
Acoustically, visually or semantically
How sensory input is transferred
into a form, allowing it to be
processed by the memory system
Sensory register
Crowder 1993: Found that the
SR only retains information in
the iconic store for a few
milliseconds, and two-three
seconds in the echoic store.
Supports idea of different
memory stores and their
duration.