Peterson and Peterson 0.0 / 5 ? PsychologyCognitive PsychologyASEdexcel Created by: ellen duckersCreated on: 14-02-14 11:13 when was Peterson & Peterson: 'short-term retention of individual verbal items' study done? 1959 1 of 11 What was the aim of the study? to investigate how long information can be retained in short-term memory when rehearsal is prevented for differing lengths of time. 2 of 11 Describe the sample. 24 psychology students chosen by opportunity sampling. 3 of 11 What were the Ptps presented with? trigrams 4 of 11 What did Ptps have to count backwards in? threes or fours 5 of 11 Why did they have to count backwards? to prevent rehearsal 6 of 11 what were the different delay times? 3, 6, 9, 12, 15, 18 seconds 7 of 11 describe the results. 80% successfully recalled, 50%, 30%, 10% - as delay time increases, ability to recall decreased 8 of 11 describe the conclusion. without the rehearsal of information, STM last a maximum of 28 seconds. 9 of 11 what theory is this study testing? MSM - STM 10 of 11 evaluate the study. -Ptps not decieved. -Ptps put under no harm -Ptps gave informed consent. -had the right to withdraw. -Ptps given standardised instructions 11 of 11
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