Duration of STM - Peterson and Peterson
- Created by: Charlotte Marriage
- Created on: 02-07-20 14:19
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- Peterson and Peterson (duration of STM)
- Aim
- To test how long STM lasts when rehearsal is prevented
- Procedure
- Participants had to remember trigrams in order after a delay of 3, 6, 9, 12, 15 and 18 seconds
- They were asked to count backwards in 3s from a random 3 digit number to prevent rehearsal
- Findings
- Participants were 90% correct after 3 seconds, 20% correct after 9 seconds and 2% after 18 seconds
- STM has a very short duration (18 seconds or less) as long as verbal rehearsal is prevented
- Evaluation
- Trigrams are artificial and don't reflect everyday memory
- May be that interference for earlier trigrams may cause poor recall, not simply decay
- Lab experiment so it allows us to see the effect of time passing (IV) on the recall of trigrams (DV)
- Aim
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