Memory - paper 1 Flashcards
memory
coding , capcity , duration
the ability of mind to retain learned infomation and knowledge of past events and expirences and to retrieve that infomation and knowledge
short term memory
coding , capcity , duration
infomation held for a short period of time for immediate use
long term memory
coding , capcity , duration
infomation stored so you can retrive it at any later point
capacity
coding , capcity , duration
the amount of infomation that can be held at a memory store at any 1 time
duration
coding , capcity , duration
the lenght of time a memory can be held for
encoding
coding , capcity , duration
the way infomation is reprosented in a memory store - ecoic , iconic , tactile , semantic
spontaneous decay
coding , capcity , duration
memory trace disapears if not reharsed
displacement
coding , capcity , duration
stm has limited capcity and new infomation pushes ut current infomation
how do we form memories
coding , capcity , duration
- first taking visual infomation (iconic infomation) in light waves
- auditory infomation (echonic infomation) in sound waves
- paying attention to the stimuli in our immediate enviornment
short term memory
coding , capcity , duration
- EXAMPLE - trying to remeber a phone number for a few secounds
- CAPCITY - 7 +/- 2 items
- DURATION - limited to 18secs without rehersal , 30s with
- ENCODING - acoustic (Baddeley 1966)
long term memory
coding , capcity , duration
- EXAMPLE - childhood memories
- CAPCITY - potentialy unlimited
- DURATION - potentially unlimited
- ENCODING - semanticaly (Baddeley 1966)
Baddeley 1966 - encoding study
coding , capcity , duration
- aim - to compare how infomation is encoded in short and long term memory
- procedure - 4 groups and presented with words to recal , acoustcally similar and dissimalr , semantically similar and dissimilar
- split groups into two , immediate recall and recall after interval of 20mins
- findings - STM - similar sounding words were worst remebered and dissimilar woinds were best remebered
- LTM -similar meaning words were worst than dissimilar meaning words
what can we conclude from Baddeley encoding study
coding , capcity , duration
- STM - acoustically encoded
- LTM - semantically encoded
postives of baddeleys encoding study
coding , capcity , duration
- lab study
- replicable
- high control of extranous variable
- good internal validty
- am i testing what i say im testing
negatives of baddeleys study of encoding
coding , capcity , duration
- bad ecological validity
- not in a natural environment
- lacks mundane realism
- artifical task
- not an everday thing to remeber words
jacobs 1887 - capacity study
coding , capcity , duration
- procedure - digist span test
- researcher reads out a number of digits/letters , particapnt recites them back , if read correctly , read out a larger number and repeat until they can not recall
- finding - mean span for digits - 9.4
- mean span for letter - 7.3
miller (1956) - capcity study
coding , capcity , duration
- procedure - observation of everydau practice
- .1. things come in 7s - days the week , music scale ,deadly sins
- .2. can remeber 5 words as well as 5 letters - chuncking can increase capcity
- conc - 7+/- 2
postives for capacity study jacobs & miller
coding , capcity , duration
- lab study
- replicable
- high control variables
- internal valitdy
- what im testing
- concurrent valdilty - both studies support eachother
- miller is ecological
- observing every day life
negative of capcity study by jacoub and miller
coding , capcity , duration
- jacobs lack ecological - not a natural environment
- lacks mundane realism - not everyday task
- miller over genersalised - assumption, no empirical evidence , no scientific credibtile
- jacobs lacks temporal validity - conducted years ago, may be different now
peterson & peterson - short term memory duration
coding , capcity , duration
- sample - 24 undergrad students - 8 trials each
- each presented with a trigram , recalled after retention interval , changing the lenght of each (up to 18s)
- had to do a interference task ( no reherasing)
- findings - as delay time increased so did amount of forgetting from STM
- 3s 80% correct
- 6s 50% correct
- 18s 10% correct
conclusion of peterson and peterson stm duration
coding , capcity , duration
duration of ATM is approximtly 18 secs without rehersal
evaluations of peterson and peterson stm duration
coding , capcity , duration
- postive - high control - lab study , high control variables , researcher has high control , high internal validty
- negative - artifical stimuli - mundane realism , wont see or do this is everyday life , lack ecological validity
- lower external validity - oter studies failed to replicate these findings
bahrick et al (1975) - duration of ltm
coding , capcity , duration
- sample - 392 american ex high school studens (17-74)
- (1. photo recognition - 50 photos some from high school yearbook
- (2. free recal - remeber names of their graduating class
- findings - 15yrs after school 90% photo , 60% free
- 48 years after 70% photo , 30% free
conclusion of bahrick ltm duration
coding , capcity , duration
very ltm seems to exist especially well with recognition cues. regognition cues is better than free recall (so ltm could be unlimited)