Capacity and encoding
- Created by: CAugust100
- Created on: 13-05-16 11:47
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- Capacity and encoding
- Studies for the capacity of STM
- Jacobs (1887)
- Recall 9.3 digits and 7.3 letters
- Suggests that digits are easier to remember due to the fact there are 9 of them and 26 letters
- Miller (1956)
- Capacity of STM is 7(+/-2)
- Simon (1974)
- People have a shorter STM for longer chunks than smaller ones
- Jacobs (1887)
- Encoding
- Baddeley 1966A +B
- tested the effects of similar acoustic words and similar semantic words
- Pts had difficulty remembering similar acoustic words in the STM but not the LTM
- Semantically similar wasn't a problem in the STM, but was in the LTM
- Baddeley 1966A +B
- Capacity, encoding and durations of STM and LTM
- STM
- Duration
- Measured in seconds and minutes
- Capacity
- 7 (+/-2)
- Encoding
- Acoustic or visual
- Duration
- LTM
- Duration
- Measured in hours, days and years
- Capacity
- Potentially unlimited
- Encoding
- Semantic (elaborative)
- Duration
- STM
- Evaluation
- Cowan (2001)
- Suggests STM more likely to be limited to 4 chunks
- Vogel et al (2001)
- Visual information is also limited to the same limit
- Cowan (2001)
- Evaluation
- Wickens et al (1976)
- STM does sometimes use semantic coding
- Brandimote et ak(1992)
- When prevented from using verbal encoding the pts could use visual codes
- Frost (1972)
- Long term recall was related to visual coding as well as semantic
- Nelson and Rothbart (1972)
- There was evidence of acoustic coding in the LTM as well
- Wickens et al (1976)
- Studies for the capacity of STM
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