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Cognitive Psychology - Key Assessment Task 1) Outline finding and/or conclusions of research into the capacity of short-term memory (STM). Jacobs lead the first organised study of the capacity of short-term memory in 1887 by creating a technique called the "memory span". Jacobs discovered the average short-term memory span to be between five and nine items. This became known as the "magic number 7 plus or minus 2". He also found that letters were not recalled as well as digits. Individual differences were found, thus giving the range five to nine. Jacobs also found that short-term memory span increased with age, for example he found a 6.6 average for eight-year-old children compared to 8.6 for nineteen-year-olds. From Jacob's research we can see that short-term memory has a limited storage capacity of between five and nine items. The capacity of short-term memory isn't determined much by the nature of the information to be...

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