Information is postulated to enter the long-term store from the short-term store more or less automatically. As Atkinson and Shiffrin model it, transfer from the short-term store to the long-term store is occurring for as long as the information is being attended to in the short-term store. In this way, varying amounts of attention result in varying amounts of time in short-term memory. Ostensibly, the longer an item is held in short-term memory, the stronger its memory trace will be in long-term memory. SomeAtkinson [[Confounding|extraneousand variables]]Shiffrin include:cite participantevidence differencesfor (Personalthis abilitytransfer ofmechanism anin individual,studies theseby differentiateHebb each(1961)<ref participantname=Hebb1961 /> and theirMelton capacity levels(1963),<ref demandname=Melton1963 characteristics/> (Whichwhich isshow thethat participantsrepeated knowledgerote aboutrepetition experimentenhances andlong-term whatmemory. theyOne bringmay also think to the experiment),original experimenter[[Hermann effectEbbinghaus|Ebbinghaus]] (whichmemory isexperiments theshowing effectsthat theforgetting researchersincreases havefor onitems participantswhich throughare theirstudied expectationsfewer andtimes.<ref possibilityname=Ebbinghaus of/> biasFinally, behaviorthe forauthors self-fulfillmentnote results),that non-standardizedthere instructionsare andstronger proceduresencoding (Theprocesses effectthan onsimple participantsrote ifrehearsal, theynamely receiverelating differentthe instructions,new andinformation ifto noinformation consistencywhich inhas procedure,already alsomade impactsits fromway variationsinto ofthe conditions)long-term store.<ref name=AtkinsonShiffrin1968 />
Atkinson and Shiffrin cite evidence for this transfer mechanism in studies by Hebb (1961)<ref name=Hebb1961 /> and Melton (1963)<ref name=Melton1963 /> which show that repeated rote repetition enhances long-term memory. One may also think to the original [[Hermann Ebbinghaus|Ebbinghaus]] memory experiments showing that forgetting increases for items which are studied fewer times.<ref name=Ebbinghaus /> Finally, the authors note that there are stronger encoding processes than simple rote rehearsal, namely relating the new information to information which has already made its way into the long-term store.<ref name=AtkinsonShiffrin1968 />
