Atkinson and Shiffrin (1968) proposed the multi-store model explaining memory in terms of 3 main stores. Sensory memory, long term memory and short term memory. Sensory memory handles unprocessed information. The information received is either iconic or echoic. Information received will either decay or be passed forward to the short term store. Most of the information we receive is processed through the STM If information is rehearsed if will then be passed onto the long term memory store, where it may remain for as long as a lifetime. According to this model of memory, long term memory has a potentially immeasurable capacity and duration. The key features of the =-906multi-store model would be;f8u The fact that coding in the LTM is assumed to be in terms of meaning i.e. semantic, therefore this shows that we will only remember something in the long term memory if it has meaning to us. The capacity and duration limitations at each stage prove that each stage is its own separate store with diverse boundaries. Transfer of information that may require re-coding; when information gets passed from the short term memory to the long term memory it has to be re-coded from either visual or sound to semantic in order for us to remember it. The transfer of information in-between stores, also play an important role in memory because forgetting can occur at each of the stores if attention and rehearsal is not paid attention to. Retrieval failure and interference only occurs when material is not rehearsed when being passed onto the long term memory where it can remain for a lifetime. This is also possible through decay. Ultimately displacement in the short term memory which is fragile and can be lost in about 30 seconds, unless it is repeated or rehearsed.