A01

Cards (17)

  • What was the main focus of Peterson and Lloyd Peterson's 1959 study?
    Duration of short-term memory (STM)
  • How many students were tested in the Peterson and Peterson study?
    24 students
  • What type of syllable were students asked to remember in the study?
    Consonant syllable
  • What was the purpose of counting backwards in the Peterson study?
    To prevent mental rehearsal of the syllable
  • What were the varying retention intervals used in the Peterson study?
    3, 6, 9, 12, 15, or 18 seconds
  • What was the average recall percentage after 3 seconds in the Peterson study?
    About 80%
  • What was the average recall percentage after 18 seconds in the Peterson study?
    About 3%
  • What conclusion did Peterson and Peterson draw about STM duration?
    STM duration may be about 18 seconds
  • Who conducted a study on long-term memory (LTM) in 1975?
    Harry Bahrick et al.
  • How many American participants were studied by Bahrick et al.?
    392 participants
  • What age range did the participants in Bahrick's study fall into?
    17 to 74 years old
  • What materials were used to test recall in Bahrick's study?
    High school yearbooks and photos
  • What was the accuracy of photo recognition for participants tested within 15 years of graduation?
    About 90% accurate
  • How did recall accuracy change after 48 years according to Bahrick's findings?
    Declined to about 70% for photo recognition
  • What was the accuracy of free recall after 15 years in Bahrick's study?
    About 60%
  • What was the accuracy of free recall after 48 years in Bahrick's study?
    About 30%
  • What does Bahrick's study suggest about the duration of LTM?
    LTM may last up to a lifetime