duration

• What is duration?

  The length of time information can be held in memory
• who was the key psychologist for the study of STM?

  Peterson 1959
• describe the STM study procedure

  • 24 students
  • given a constant syllable to remember and also a 3-digit number.
  • then had to count backwards from that number until asked to stop.
  • told to stop at different times:
  • 3,6,9,12,15,18 seconds
• why did the students count backwards?

  to prevent mental rehearsal of the constant syllable- it would increase the students memory
• what is retention interval?

  the period between a participants exposure to information and being tested for retention
• what’s ere the findings of Peterson study?

  STM has a short duration unless we repeat something over and over again —> verbal rehearsal
• who was the key psychologist in the LTM study?

  bahrick et al 1975
• describe the LTM study procedure

  • 392 participants aged 17-74
  • recalled all the names of their graduating class form photos in a yearbook.
  • 15 years after graduation - 90% accurate
  • 48 years after graduation - 30% accurate
• what were the findings of bahricks study

  LTM can last a very long time - years or decades
• evaluate Peterson study

  • stimulus material was artificial.
  • does not reflect most real-life memory activities.
  • we try to remember meaningless stuff.
  • lacks external validity
• evaluate bahricks study

  • real life meaningful memories studies.
  • shepard 1967–> studies conducted with meaningless pictures had lower recall rates