Short and Long term memory

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what is the capacity of STM
7 +/- 2 chunks
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who did the STM digit span study
Joseph Jacobs
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what was the average span for digits?
9.3
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for letters?
7.3
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number of participants in the Peterson's study
24
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why does chunk size matter
participants had a harder time remembering multiple word phrases (large chunks) than single words (small chunks)
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how was duration of LTM tested
Bahnck et al - 400 people aged 17-74, high school yearbook retention, their class, then free recall - name the student
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the findings of Bahnck's study?
Participants who graduated around 15 years ago were 90% accurate on their class, 70% on free recall, others around 48 years out of graduation were 70% on class retention, 30% on free recall
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why was the STM test of digit recall not ecologically valid?
Trying to remember constant syllables is not a realistic test of everyday memory functions where what we try to remember is meaningful
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Card 2

Front

who did the STM digit span study

Back

Joseph Jacobs

Card 3

Front

what was the average span for digits?

Back

Preview of the front of card 3

Card 4

Front

for letters?

Back

Preview of the front of card 4

Card 5

Front

number of participants in the Peterson's study

Back

Preview of the front of card 5
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