Peterson and Peterson

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when was Peterson & Peterson: 'short-term retention of individual verbal items' study done?
1959
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What was the aim of the study?
to investigate how long information can be retained in short-term memory when rehearsal is prevented for differing lengths of time.
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Describe the sample.
24 psychology students chosen by opportunity sampling.
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What were the Ptps presented with?
trigrams
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What did Ptps have to count backwards in?
threes or fours
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Why did they have to count backwards?
to prevent rehearsal
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what were the different delay times?
3, 6, 9, 12, 15, 18 seconds
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describe the results.
80% successfully recalled, 50%, 30%, 10% - as delay time increases, ability to recall decreased
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describe the conclusion.
without the rehearsal of information, STM last a maximum of 28 seconds.
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what theory is this study testing?
MSM - STM
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evaluate the study.
-Ptps not decieved. -Ptps put under no harm -Ptps gave informed consent. -had the right to withdraw. -Ptps given standardised instructions
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Card 2

Front

What was the aim of the study?

Back

to investigate how long information can be retained in short-term memory when rehearsal is prevented for differing lengths of time.

Card 3

Front

Describe the sample.

Back

Preview of the front of card 3

Card 4

Front

What were the Ptps presented with?

Back

Preview of the front of card 4

Card 5

Front

What did Ptps have to count backwards in?

Back

Preview of the front of card 5
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