Capacity in Stm

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• Span-measure studies of STM
• PPs given series of words, digits etc.
• Immediate recall (accuracy and order)
• Lists get progressively longer
• To obtain results, plot length of list against % correct recall
• Generally it is found that PPs are able to recall between 5 and 9 chunks of information (i.e. 7±2 chunks)
• Miller (1956) and others suggested that this represented the capacity of STM
• A rule can be used to chunk information together, allowing STM