... forgotten quickly. Rehearsal prolongs the life of STM and enough revision means information transfers to LTM, which can store information for a long period. The two-process model has been very influential and many psychologists have tried to understand the different characteristics of these two memory stores. Information in LTM may sometimes be lost quite quickly but information can last for a long time. The duration of LTM can therefore be anything from a few minutes to a lifetime. STM however is thought to be much shorter. (Peterson and Peterson) (1959) Found that if people are prevented from rehearsing information they can forget it in just a few seconds. They gave people a serious of consonants called a trigram, each one had to recall but remember only one at a time. The participants were prevented from rehearsing instead they were made to count backwards in threes from a number immediately after ...

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