multi store model

• what is capacity ?

  quantity of information stored
• what is duration ?

  the length of time information is held for
• what is coding ?

  the type of info being stored
• how does info go into STM ?

  we pay attention when it is in the sensory register
• how do things stay in our STM ?

  rehearsal
• what is the capacity of sensory register ?

  very large
• what is duration of sensory register ?

  limited to milliseconds
• what is the coding of the sensory register ?

  sense specific
• what is the capacity of STM ?

  large ( 5 - 9 chunks )
• what is the duration of STM ?

  18 seconds
• what is the coding of STM ?

  acoustic
• what is the capacity of LTM ?

  unlimited
• what is the duration of LTM ?

  lifetime
• what is coding of LTM ?

  coded by meaning / semantically
• what was the procedure to find out coding in STM and LTM ?

  gave different lists of words to four groups to remember in any order

  ( semantically similar and different , acoustically similar and different )
• what were the results from the research into coding of STM and LTM ?

  recall immediately after did worse on acoustically similar

  recall after 20 mins did worse with semantically similar
• what was the procedure to find out capacity of STM ?

  given number of digits and participant is asked to recall in correct order immediately and they increase number of digits when they answer correct and do this until they get the answer incorrect
• what are the results of research into capacity of STM ?

  mean span for digits = 9.3

  mean span for letters = 7.3
• what was the procedure for research into duration of STM ?

  in each trial student given a trigram and a 3 digit number , then asked to count backwards from that 3 digit number

  each trial had a diff amount of rehersal time - 3,6,9,12,15
• what were the results from the duration of STM research ?

  very short duration unless we repeat something again and again
• what is the research into the duration of LTM ?

  students asked to match previous classmates names to yearbook photos
• what were the results of duration of LTM research ?

  60% accuracy in matching
• what is the serial position experiment ?

  participants study long list of word and asked to recall as many possible in any order
• what were the results from the serial position experiment ?

  • recalled words at end of list as they are circulating in STM
  • recalled words at the start well as had been rehearsed and moved to LTM
  • recalled no words in the middle
• what is the recency effect ?

  words circulating in STM
• what is the primacy effect ?

  words that have been rehearsed and gone into LTM
• does the serial position experiment support the multi store model of memory ?

  yes

  • it shows that if you rehearse something it will transfer to LTM
  • also shows how short the duration of STM is
• who was patient HM and did this study support the MSM ?

  • suffered from epilepsy and in attempt to treat this , brain tissue was removed resulted in LTM being affected but STM wasnt
  • yes this supports it because it shows that each memory store is separate
• who was clive wearing and does his case support the MSM ?

  • worst case of amnesia - less than 30 seconds memory
  • has some long term memories but no short term
  • supports model as shows that he can't transfer memories which is part of linear structure of MSM
• who was patient KF and does this support the MSM ?

  • injured in motorbike accident and able to recalled LTM memories
  • able to remember visual images but couldn't remember sounds
  • criticises model as suggests model is too simplistic