Duration of Memory Studies: Peterson and Peterson Flashcards Preview

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Flashcards in Duration of Memory Studies: Peterson and Peterson Deck (15):
1

Method

Participants were shown nonsense trigrams and asked to recall them after either 3, 6, 12, 15 or 18 seconds

2

How long were the trigrams shown for?

3, 6, 12, 15 or 18 seconds

3

Method: What were participants asked to do after seeing the trigrams?

Count backwards in threes from a given number

4

Method: counting backwards from a given number was a...

Interference task

5

Method: why were the participants given an interference task?

So they wouldn’t recall the numbers internally

6

Results: 3 seconds

Participants could recall about 80% correctly

7

Results: 18 seconds

Only 10% could be correctly recalled

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conclusions

when rehearsal is prevented, very little can stay in STM for longer then about 18 seconds

9

Evaluation: type of study

laboratory study

10

Evaluation: Reliability

because it was a laboratory study the variables can be tightly controlled

11

Evaluation: Ecological validity

nonsense trigrams are artificial, so the study lacks ecological validity

12

Evaluation: Real life

meaningful or real-life memories may last longer in short term memory

13

Evaluation: Stimulus

the duration of short term memory may depend on the type of stimulus

14

Evaluation: Trigram

due to the participants each seeing different trigrams, this could have led to confusion meaning that the first trigram was the only realistic trial

15

What did they study?

investigated short term memory using trigrams