Multi-Store Model - Evidence for STM + LTM

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  • Multi-Store Model - Evidence for STM + LTM
    • Capacity - Max amount able to store in memory at one time
    • Duration - Max length of time memories can be held
    • Encoding - Way in which represented in memory
    • STM
      • Capacity - 7+/- 2
        • Miller
        • Digit span technique
          • Given list of digits they had to recall in the correct order
          • One digit added on each time
      • Duration - 30 secs
        • Peterson + Peterson
        • Presented with trigram and 3 digit number
          • Counted back from number in 3s for certain period of time
            • Retention period to prevent rehearsal
      • Encoding - Acoustic
        • Conrad
        • Displayed 6 random consonants
          • 1. Similar sounding
          • 2.Dissimilar sounding
          • More difficult to recall similar sounding - harder to distinguish in store
    • LTM
      • Capacity - Potentially unlimited
      • Encoding - semantically
        • Baddeley
        • Presented lists of words which Pps had to recall in the correct order after 20 mins - no rehearsal
          • 1. Acoustically similar
          • 2. Acoustically dissimilar
          • 3. Semantically Similar
          • 4. Semantically dissimilar
          • Semantically similar words harder to recall - harder to distinguish in store
      • Duration - up to a lifetime
        • Tested 400 American high-school graduates, some 48 yrs later on memory of former classmates
          • Recall declined after 47 years
        • Bahrick
    • Multi-store Model

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