coding, capacity and duration of memory

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  • Created by: IvyVega
  • Created on: 24-02-18 18:38
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  • Coding, capacity, duration of memory
    • study 1: Baddeley, coding in STM and LTM
      • procedure
        • acoustically similar words or dissimilar
        • semantically similar words or dissimilar
      • findings
        • immediate recall worse with acoustically similar words
          • STM is acoustic
        • recall after 20 minutes worse with semantically similar words
          • LTM is semantic
    • study 2: Jacobs, capacity of STM
      • procedure
        • digit span
          • researcher reads four digits and increases until the participant cannot recall the order correctly
      • findings
        • on average, participants could repeat back 9.3 numbers and 7.3 letters in the correct order
          • immediately after they were presented
    • study 3: miller, capacity of STM
      • procedure
        • miller made observations of everyday practice
          • for example, he noted that things come in sevens
      • findings
        • the span of STM is about 7 items but can be improved by chunking
          • grouping sets of digits/ letters into meaningful units
    • study 4: Peterson and Peterson, duration of STM
      • procedure
        • 24 students were given a consonant syllable to remember and a 3 digit number to count backwards for a couple of seconds
      • findings
        • students recalled about 80% of the syllables correctly with a 3-second interval.
          • average recall after 18 seconds fell to about 3%.
    • Study 5: bahrick et al, duration of LTM
      • procedure
        • Participants were 392 americans aged between 17 and 74
          • recognition test
            • 50 photos from participants high school yearbook
          • free recall test
            • participants listed names of their graduating class
      • findings
        • participants tested 48 years after graduation were about 70% accurate in photo recognition
          • free recall was less accurate

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