Flashcards in Duration of Memory Studies: Peterson and Peterson Deck (15):
Participants were shown nonsense trigrams and asked to recall them after either 3, 6, 12, 15 or 18 seconds
How long were the trigrams shown for?
3, 6, 12, 15 or 18 seconds
Method: What were participants asked to do after seeing the trigrams?
Count backwards in threes from a given number
Method: counting backwards from a given number was a...
Method: why were the participants given an interference task?
So they wouldn’t recall the numbers internally
Results: 3 seconds
Participants could recall about 80% correctly
Results: 18 seconds
Only 10% could be correctly recalled
when rehearsal is prevented, very little can stay in STM for longer then about 18 seconds
Evaluation: type of study
because it was a laboratory study the variables can be tightly controlled
Evaluation: Ecological validity
nonsense trigrams are artificial, so the study lacks ecological validity
Evaluation: Real life
meaningful or real-life memories may last longer in short term memory
the duration of short term memory may depend on the type of stimulus
due to the participants each seeing different trigrams, this could have led to confusion meaning that the first trigram was the only realistic trial