Millers literature review research showed that organising information in chunks enabled the STM to cope with about 7 chunks.
Limitation)Didn't specify how much a "chunk" is.
Duration of STM
Peterson gave participants 3 letter trigrams alongside a 3 digit number they had to count backwards from at timedintervals. He found that the larger the interval the less accurate the recall. Concluded that a persons duration is from 0-18 seconds.
Limitation)Had low ecological validity because trigrams are meaninglessstimuli which don't represent everyday memory.
Duration of LTM
Bahrick gave 392 American graduates photographs from their year book and asked them to give the each photo a name. He found that 90% of participants could accurately recall their classmates name even after 14 years.
Strength)High ecological validity because he used real life memories.
