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Memory

1. STM

   • Duration: 18 - 30 second
   • Encodes: acoustically
   • Capacity: 7+/-2

2. LTM

   • Capacity: Endless

3. Sensory Register

4. Memory consists of 3 different stores; LTM, STM and Sensory

5. Information is transfered from STM to LTM by rehersal

6. STM and LTM are unitary stores

7. Coding: how the information is stored (sound, vision)

8. Capacity: How much information is stored

9. Duration: How long information lasts in STM

10. Simon - 1974

    • Investigated chunking
    • Participants presented with lists of 1 word, 2 words and 8 word chunks
      • The larger the chunk the less can be recalled

11. Peterson & Peterson

    • Test how long info lasts in STM when rehersal is prevented
    • The participants where shown nonsense trigrams (3 letters) asked to count backwards in 3's. The amount of time lengthened e.g. 3, 10, 18, 30
      • 3s = 80%
      • 6s = 40%
      • 18s = 10%

12. Bahrick- 1995

    • Test of LTM
    • 1 - 45 years since participants left high school. 1 recognition group and recall group
      • 7-14 years = 90% (rec) 60% (reg)
      • 47 = 60% (rec) 20% (reg)

13. Baddely - 1966

    • Word list study- timed delay
    • STM = Sound
    • LTM = Meaning