Duration, Capacity and Encoding

Description

Just a mindmap to sum up duration, capacity and encoding.
Jackalpenguin7
Mind Map by Jackalpenguin7, updated more than 1 year ago
Jackalpenguin7
Created by Jackalpenguin7 over 9 years ago
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Resource summary

Duration, Capacity and Encoding
  1. Duration
    1. Peterson & Peterson (1959)
      1. - aimed to find the duration of STM
        1. - method: 24 participants, trigrams, displacement activities
          1. - results: 90% accuracy at 3 secs, 2% accuracy at 18 secs
            1. Strengths
              1. - simple nature of the experiment makes it easy to identify the
                1. effect of the IV (time delay) on the DV (recall)
              2. Weaknesses
                1. - ecologically invalid: don't usually have to remember such artificial data
                  1. and if an item has meaning we're more likely to remember it
                    1. - could be claimed that they were not testing duration but displacement
        2. Nairne (1999)
          1. - aimed to find the duration of STM
            1. - method: trigrams, no displacement activities
              1. - results: STM can last for as long as 96 secs without
                1. displacement
          2. Bahrick et al (1975)
            1. - aimed to demonstrate duration of LTM
              1. - method: asked people of varying ages to put names to faces
                1. in their old school yearbooks
                  1. - results: 48 years on, people were 70% accurate
          3. Capacity
            1. Jacobs (1887)
              1. - aimed to find the capacity of STM
                1. - method: digit span
                  1. - results: 9.3 numbers, 7.3 letters
            2. Encoding
              1. Baddeley (1966)
                1. - aimed to find the different ways in which
                  1. memory is encoded
                    1. - method: participants given a list of words with similar
                      1. sounds (cat, mat, etc.), a list of words with similar meanings
                        1. (big, large, etc.) or lists of semantically and acoustically dissimilar
                          1. words.
                            1. - results: in the short term, more mistakes with acoustically similar
                              1. and in the long term, more mistakes with semantically similar
                                1. - conclusion: STM = encoded acoustically
                                  1. LTM = encoded semantically
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