coding, capacity and duration of memory
- Created by: IvyVega
- Created on: 24-02-18 18:38
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- Coding, capacity, duration of memory
- study 1: Baddeley, coding in STM and LTM
- procedure
- acoustically similar words or dissimilar
- semantically similar words or dissimilar
- findings
- immediate recall worse with acoustically similar words
- STM is acoustic
- recall after 20 minutes worse with semantically similar words
- LTM is semantic
- immediate recall worse with acoustically similar words
- procedure
- study 2: Jacobs, capacity of STM
- procedure
- digit span
- researcher reads four digits and increases until the participant cannot recall the order correctly
- digit span
- findings
- on average, participants could repeat back 9.3 numbers and 7.3 letters in the correct order
- immediately after they were presented
- on average, participants could repeat back 9.3 numbers and 7.3 letters in the correct order
- procedure
- study 3: miller, capacity of STM
- procedure
- miller made observations of everyday practice
- for example, he noted that things come in sevens
- miller made observations of everyday practice
- findings
- the span of STM is about 7 items but can be improved by chunking
- grouping sets of digits/ letters into meaningful units
- the span of STM is about 7 items but can be improved by chunking
- procedure
- study 4: Peterson and Peterson, duration of STM
- procedure
- 24 students were given a consonant syllable to remember and a 3 digit number to count backwards for a couple of seconds
- findings
- students recalled about 80% of the syllables correctly with a 3-second interval.
- average recall after 18 seconds fell to about 3%.
- students recalled about 80% of the syllables correctly with a 3-second interval.
- procedure
- Study 5: bahrick et al, duration of LTM
- procedure
- Participants were 392 americans aged between 17 and 74
- recognition test
- 50 photos from participants high school yearbook
- free recall test
- participants listed names of their graduating class
- recognition test
- Participants were 392 americans aged between 17 and 74
- findings
- participants tested 48 years after graduation were about 70% accurate in photo recognition
- free recall was less accurate
- participants tested 48 years after graduation were about 70% accurate in photo recognition
- procedure
- study 1: Baddeley, coding in STM and LTM
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