Duration, Capacity and Encoding

Mind Map by Jackalpenguin7, updated more than 1 year ago
Created by Jackalpenguin7 over 5 years ago


Just a mindmap to sum up duration, capacity and encoding.

Resource summary

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