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==Summary==
[[File:Multistore model.png|thumb|327px|right|'''Multi-store model''': Atkinson and Shiffrin's (1968) original model of memory, consisting of the sensory register, short-term store, and long-term store.]]
The model of memories is an explanation of how memory processes work. The three-part, multi-store model was first described by Atkinson and Shiffrin in 1968,<ref name=AtkinsonShiffrin1968 /> though the vac idea of distinct memory stores was by no means a new idea at the time. [[William James]] described a distinction between primary and secondary memory in 1890, where primary memory consisted of thoughts held for a short time in consciousness and secondary memory consisted of a permanent, unconscious store.<ref name=James1890 /> However, at the time the [[Occam's razor|parsimony]] of separate memory stores was a contested notion. A summary of the evidence given for the distinction between long-term and short-term stores is given [[#Evidence for distinct stores|below]]. Additionally, Atkinson and Shiffrin included a sensory register alongside the previously theorized primary and secondary memory, as well as a variety of control processes which regulate the transfer of memory.
Following its first publication, multiple extensions of the model have been put forth such as a precategorical acoustic store,<ref name=CrowderMorton1969 /> the search of associative memory model,<ref name=RaaijmakersShiffrin1981 /><ref name=ShiffrinRaaijmakers1992/> the perturbation model,<ref name=Estes1972 /><ref name=Lee1992 /> and permastore.<ref name=Bahrick1984 /> Additionally, alternative frameworks have been proposed, such as procedural reinstatement,<ref name=HealyEtAl1992 /> a distinctiveness model,<ref name=NeathCrowder1990 /> and [[Baddeley's model of working memory|Baddeley and Hitch's model of working memory]],<ref name=BaddeleyHitch1974 /> among others.
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