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Coding, Capacity and Duration (Duration (Peterson asked people to remember…
Coding, Capacity and Duration
Coding
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Used artificial stimuli and so lacks external validity because the results cannot be generalised to meaningful memories
Capacity
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Jacobs found that the mean number of numbers participants could remember was 9.3 and the mean number of letters was 7.3
Done in old, uncontrolled labs, lacks internal validity
Recent, more scientific studies have confirmed findings
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Duration
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Peterson asked people to remember information for different durations, they counted down to prevent rehearsal
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Bahrick’s yearbook study found that after 15 yrs photographic recognition was 90% and recognition of names was 60% and after 48yrs it was 70% and 30%
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Individual differences, some people would look at their year book more than others