Memory Flashcards
What are the 3 types of ltm + give brief explanation
• episodic - episodes in life .. birthdays
• semantic - known facts - capital of India
• procedural - making tea, riding a bike step by step processes
How is the capacity + duration of ltm
• infinite capacity - no way to test it as ppl often forget facts and info
• longer duration than stm
• larger capacity than stm
What is it called when ppl cant recall memories from life before age of 2
Childhood amnesia
Or
Infantile amnesia
Evidence for duration of long term memory A01
Bahrick- field study
• asked 392 American graduates to identify ppl from their school yearbook
• ppts given list of names to match ro faces
• some cases went back to 47 years
Bahricks study for duration of long term memory A03 what does it suggest
• those recalling from 14 years ago recalled 90%
• those recalling from 47 years ago recalled 60%
- suggests ltm lasts a lifetime as 60% recall after 47 years is not likely to fade too much after
Evaluating Bahrick research duration and long term memory A03
• field study so has good ecological validity as experiment was realistic to real life events
• had less control over variables in study
More evaluation into bahricks.. what limitations ppts A03
• some ppts may have had better recall as they were in touch w ppl in ywar book or lived in same town
• other ppts may have bad recall as they never knew names to begin w
• study also never explains why memory gets worse as aging
How does long term memory get encoded
- semantically .. found by baddeley
What is evidence for encoding in long term A01
• baddeley gave ppts four lists of words to learn
• acoustically similar- sound the same eg bat cat
• acoustically dissimilar- do not sound same police car
• semantically similar- words w same meaning . Large big
• semangically disimalr- diff meaning words . Computer chair
How were the lists of words presented in Baddeleyes encoding study
• visually represented
• ppts had to remember in order presented
What were the findings of baddeleys encoding experiment A03
• semantically similar words had worst recall- getting them in correct order was difficult as they all meant the same thing
• no diff in ltm for acoustically similar of dissimilar
• from this concluded ltm relied on semantic encoding to process info
Evaluation of baddeley encoding ltm A03
• lab experiment so lacked ecological validity as tasks do not relate to real life
• words had little meaning to ppts so harder to recall
• info that is recalled in real life has significant meaning making recall easy
What are the 5 types of sensory memory
• iconic memory from sight or light - u remember cinema for how light went down
•echoic memory: sound or auditory - recall a song
• haptic memory- touch - u can recall how rain touches skin
• olfactory memory- smell- smell of fresh bread reminds u of something
• gustatory memory- memory from taste - taste of something might remind u of childhood or memory
What is stm
• holds small amount of info for short time
• capacity and duration of stm is more than sensory memory but less than ltm
• seen as a holding device and can be moved to ltm if not forgotten
Study for capacity of atm A01
• miller - indicated capacity as 7 items plus or minus 2
• he did an experiment where asked ppts to recall info but kept adding phrases after
• found that ppts struggled between 5-9 words
• known as millers magic 7
A03 evaluating millers study for stm
• was a lab experiment so variables highly controlled so were extraneous variables
•replicable so it was more reliable
• lacked ecological validity as study wasn’t replicating real life events
A03 a study that supports millers study for capacity of stm
• jacobs replicated study of millers
• he used digits instead of numbers
• found results similar to millers w average recall being around 7.3
• supports millers
How long is duration of stm
18-30 seconds
What study was done for duration of stm A01
PETERSON AND PETERSON
• ppts given “nonsense trigrams” to remember along with 3 digits numbers
• ppts had to recall trigrams after timed intervals delays 3s,6s,9s 12/15 or 18s
• during delay they were given distraction task such as dousing backwards
• done to prevent them rehearing during delay
A03 findings of Peterson& Peterson duration of stm study
• after 3 secs 80% of ppl recalled correctly
• aftwr 18s fewer than 10% recalled
Shows recall gets worse as time delay grew
Evaluation A03 of Peterson & Peterson stm duration study
• low external validity as they used artificial stimuli to measure duration of stm
• well controlled study
• trigrams do not reflect everyday activities - so lacks ecological validity as it may not be possible to generalise findings .. also
• doesn’t prove decay so it challenges the validity
What is the multi store model of memory
A cognitive model of memory containing three inputs
- sensory memory, stm and ltm
Works similarly to how a computer is designed
How does sensory memory go to stm
Attention
How does stm go to ltm and back
Recall
And rehearsal