The multi-store model cases

List of cases to support the model.

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  • Created by: Leticia
  • Created on: 04-11-11 09:44

A study of the primacy-recency effect- Glanzer & C

  • 15 words to remember
  • Some recalled right after or 10 seconds delay
  • primacy words- well remembered (transferred to LTM)
  • recency words (near end)- badly remembered (still in STM)
  • STM is a separe store from LTM, information has to be rehearsed or will disappear from STM

=) Control extraneous varibales, debriefing

=( Participant reactivity, psychological harm

1 of 5

The capacity of STM- Jacobs

  • Children & adults
  • Sequence of letters nd number- half-second interval
  • The capacity of STM is 7 items
  • Capacity in children is less than in adults

=) Control extraneous variables, debriefing

=( Participant reactivity, psychological harm

2 of 5

The duration of STM- Peterson & Peterson

  • tri-grams, recall after a delay
  • asked to count backwards in 3
  • recall of trigrams is very low after 20 seconds
  • The duration of STM is about half a minute

=) Can control extraneous variables, debriefing

=( Participant reactivity, psychological harm 

3 of 5

Encoding in STM and LTM- Baddeley

  • list of 5 words to remember
  • recalled immediately before, came back next day and recalled again
  • some sounded similar, some were semantically similar
  • Acoustic encoding is important in STM
  • Semantic encoding is important in LTM

=) can control extraneous variables, debriefing

=( participant reactivity, psychological harm

4 of 5

Duration of LTM- Bahrick

  • Asked to identify people in old school photos
  • tested knowledge in Spanish and Algebra
  • people lose abuot 1% of info. per year
  • memories can have a very long duration- perhaps a lifetime
  • The duration of LTM can be as long as a lifetime

=) can control extraneous variables, debriefing

=( participant reactivity, psychological harm

5 of 5

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