Nature of memory

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  • The nature of memory
    • Duration - (how long)
      • Studies
        • LTM - Bahrick's yearbook
          • 400 PPTS look at yearbooks and recall the graduating class.
            • F-15yrs=90% 48yrs= 70%
              • LTM Duration = a lifetime
        • STM - Peterson and petersons' Trigram
          • PPTS remember a nonsense syllable trigram - distracting task.
            • F-3S=90% 6,9s=20% 12,18s=2% recall.
              • STM Duration = 18 Seconds
      • AO3
        • Artificial STM testing
          • Doesn't reflect everyday life = low mundane realism
    • Capacity - (how much)
      • studies
        • STM - Jacobs serial digit span
          • PPTS recall an increasingly long sequence
            • F - fail on 50% = digit span capacity reached
              • STM Capacity = Limited
          • Miller's magic numbers follow up study
            • Capacity of STM = 7±2 items, notes, digits, letters and words
              • Words are remembered just as well as letters due to chunking.
      • AO3
        • Individual differences
          • Jacob found recall increased with age.
        • Size of chunk
          • The bigger the chunk the less recall
    • Encoding - (how its changed)
      • Info arrives at  sensory memory in its original form.
        • Its then encoded into a form that STM can handle
          • Acoustically = by repeating the info over and over again
          • Untitled
      • Baddeley studies
        • PPTs a list of words that were acoustically similar but semantically different and another list the opposite.
          • STM = recall straight away
          • LTM = recall after 20 mins
      • AO3
        • Does Not represent LTM properly
          • 20 minutes can't represent a lifetime = low mundane realism

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