multi store models experiments Flashcards
who experimented with the STM and LTM coding
Baddeley
what did baddeley do to investigate into STM/LTM coding
had 4 lists of words, each list either acoustically or semantically diff/similar.
They had to recall immediately or 20 mins later
what did Baddeley discover for either recalling immediately or 20 mins later
recall immediately= acoustically diff best because STM codes acoustically
recall 20 mins= Semantically diff best because LTM codes semantically
who investigated STM capacity
Miller
how did Miller investigate
ppts must remember list of increasing numbers/letters.
called digit span test and is now used to measure STM capacity
who investigated STM duration
Baddeley
how did Baddeley investigate STM duration
give ppts 3 letter anagram (XJN) and tell them to recall this after certain amount of time.
time increases each time and use distraction task to prevent rehearsal.
results of Baddeley’s investigation into STM duration
ppts couldn’t rehearse so the longer the time had less accuracy with rehearsal
results of Millers investigation into STM capacity
more number to recall led to less accuracy
who investigated LTM Duration
Bahrick
How did Bahrick investigate LTM duration
392 Americans 17-74
yearbook obtained from ppts
1) photo recognition of 50 photos
2)recall name of graduating class
Results of Bahricks investigation into LTM duration
Photo recognition
-within 15yr grad 90% accurate
-after 48yrs grad 70% accurate
Free recall
-within 15yr grad 60% accurate
-after 48yr grad 30% accurate
Strengths and weaknesses of Bahricks study
Weaknesses
-lacked population validity, Americans only so not all nationalities may have same results
Strengths
-high eco validity
