memory key studies

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Research in to STM Peterson and Peterson


 Procedure: Briefly shown a consonant trigram, asked to count backwards after intervals of 3,6,9,12,15,18 seconds asked to recall the original trigram, repeated several times

Findings: recalled 80% of trigrams after a 3 second interval 

Conclusion: time between learning and recall increased fewer trigrams recalled

Evaluation: trigrams artificial interference from earlier trigrams,  effect of time, reliable study 


Encoding in STM Baddely


 Procedure: Divided in to 4 groups each heard a


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