Memory STM & LTM

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  • STM & LTM
    • Capacity
      • How much information can be stored.
      • STM
        • Miller (1956) The Magic Number 7+/-2
          • Evaluation
            • Size of the chunk matters
              • Simon (1974) shorter memory span for larger chunks
            • Individual differences
              • Jacobs, recall increased steadily with age.
            • Capacity may be more limited.
              • Cowan (2001) reviewed studies and concluded that the STM is limited to 4 chunks
    • Duration
      • STM
        • Peterson & Peterson (1959) Pps given constant syllable + 3 digit number and recall after 3,5,9,12,15,18 seconds
          • Evaluations
            • Testing was artificial
            • May be due to displacement
      • LTM
        • Bahrick et al (1975) test 400 people, photo recognition test.
          • Evaluation
            • Individual difference
            • May be health factors
      • How long information is stored for
    • Encoding
      • LTM
        • Baddeley (1966)
          • LTM is mainly acoustic (cat, cab, cap)
          • STM is mainly semantic (great, large, big)
          • Evaluation
            • STM may not be exclusively acoustic
              • Visual codes are also used in STM
            • Baddeley may not have tested the LTM
      • Way information is stored

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