Craik and Watkins (1973) distinguished between maintenance and elaborative rehearsal. Maintenance rehearsal is a strategy that is often used by young children - it involves simply repeating information over and over again - but it only helps maintain information for a few seconds (i.e. in STM). To encode information successfully into LTM, more elaborate forms of rehearsal are required. In other words, the information must be made meaningful - for example, perhaps by linking it to pre-existing knowledge. Elaborated memories are easier to recall because several different routes can be used to reach items in this memory.
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