Research

Cards (10)

  • Bahrick investigated duration of LTM
  • Baddeley investigated coding in STM/LTM
  • Miller investigated capacity of STM
  • Glanzer and Cunitz investigated the distinct stores within memory
  • Peterson & Peterson investigated duration of STM
  • Baddeley - encoding in STM and LTM.
    75 pp's were allocated to one of 4 lists.
    1-acoustically similar
    2- acoustically dissimilar
    3- semantically similar
    4- semantically dissimilar
    • to test STM they were given a list of the same words in a different order and were asked to arrange them in the original order.
    • to test LTM they had to perform the same task after 20 mins to prevent rehearsal
    • Participants got more mixed up with similar sounding/meaning words.
  • Miller - capacity of STM
    carried a literature review on published investigations on perception and STM from 1930-50
    • found that the STM has a capacity of 7+/-2 items
    • chunking helps us rmbr more
  • Bahrick- duration of LTM
    400 participants aged 17-74 were asked to identify names and faces of classmates from a year book.
    • ppl who left in the last 15 years remembered 90%
    • ppl who left 40 years ago remembered 70%
    • LTM memories can last a lifetime
  • Glanzer and Cunitz- investigated the distinct stores within memories
    Participants learnt a list of words varying in length from 10-40 words.
    • ppl remembered first (primacy effect) and last words (recency effect) more than the middle words due to serial positioning.
    • STM and LTM are distinct and unitary
  • Peterson and Peterson- investigated duration of STM
    participants were asked to learn trigrams and were then told to count backwards from a 3 digit number, they were told to stop at different times.
    • after 3 seconds participants remembered 80% of trigrams
    • after 18 seconds participants recalled 10% of trigrams
    • duration of STM is 18-30 seconds and recall decreases over time