MEMORY Flashcards
what are the three stores of memory
coding, capacity and duration
what is coding
the format/type of information which is stored in each memory store
how is memory coded in stm
acoustically
how is memory coded in ltm
semantically
researcher for coding
baddeley
procedure of baddleys study
gave different lists of words to four groups of ppts to remember:
- 1 (acoustically similar)
- 2 (acoustically dissimilar)
- 3 (semantically similar)
- 4 (semantically dissimilar)
ppts show original words and asked to recall them in the correct order
results of baddleys study
when stm recall, ppts tended to do worse with acoustically similar words
when ltm recall (20 mins), ppts did worse with semantically similar words
findings of baddleys study
information is coded semantically in ltm and acoustically in stm
what is duration
the length of time information can be held in memory
2 researchers for durations
jacobs and miller
what did jacobs research
digit span
procedure for jacobs digit span
reads off increasing digits for ppts to recall
findings of jacobs study
the mean span for digits across all ppts was 9.3 items, for letters 7.3
what did miller study
span of memory and chunking
miller procedure
observations of everyday practice eg things come in sevens (seven deadly sins, seven notes on music scale, seven days of week)
miller findings
the capacity of stm is about 7 items plus or minus 2 BY CHUNKING
what is duration
the length of time information can be held in memory
2 researchers for duration
peterson & peterson and bahrick
sample for peterson and peterson
24 undergraduate students
procedure of duration of stm
each student took part in 8 trials, on each trial the student was given a consonant syllable (trigram) to remember and a 3 digit number, student then asked to call backward from 3 digit number until told to stop, each trial told to stop after different time: 3,6,9,12,15,18
why did ppts count backwards in peterson and peterson study
to prevent mental rehearsal of consonant syllable
what is the time ppts had to count for called - peterson and peterson study
retention interval
findings of peterson and peterson study
stm has a short duration - 18 seconds - unless we rehearse