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Slide 1

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Peterson and Peterson (1959)
They took the idea of the Multi-store
model and tested how long information
remains in the short-term memory.…read more

Slide 2

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· To test the duration of the short-term
memory (STM) by measuring the retention of
items in the STM when rehearsal is prevented
for different amounts of times.…read more

Slide 3

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· 24 students were tested on their recall.
· The items they were tested on were trigrams,
meaningless three-consonant syllables. No two
trigrams shown after one another had the same letter.
· Each participant were shown the trigrams, and then
told to count backwards in threes or fours until a light
flashed and they needed to recall what the trigram
· Different times in between each trigram when they
were counting backwards (3,6,9,12,15, and 18
seconds)…read more

Slide 4

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· As the delay between hearing and saying the
trigram increased, the ability to recall the
trigram decreased.…read more

Slide 5

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· When rehearsal is prevented the items in the
STM are lost and only lasts for about 28
seconds.…read more

Slide 6

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Strengths Weaknesses
· Shows that the more time delay · The participants were all students
there was in between hearing and so they are used to being tested
recalling, the last likely to on and are more likely to
remember, so it supports the remember the trigrams.
multi-store model. · There were only 24 students so it
· Was an experiment so all the is a unrepresentative sample.
variables were controlled making Making the study
it easier to replicate (high ungeneralisable.
reliability) · All the variables were controlled
so there is a lack of ecological
validity (low validity)…read more


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