The modal model of memory, there are three different "stores" in which information is processed. These three stores each have a different duration, capacity, coding, and reason for forgetting. In the sensory store the duration is less than one second, the capacity is great and it the information is coded by sensory processing. In sensory store we forget information because of decay, which is the fading away of information. In short term store, the duration is 20 to 30 seconds, the capacity is usually between five and nine and the information is coded by means of auditory, visual, and semantic processing. The reason for forgetting in short term store is because of displacement; when new information is gained, old information is lost. In long term store, both the duration and capacity are unlimited. Information is coded semantically and forgetting occurs because of interference; the information is still in the memory but because of the great amount of information in long !
             term store, we cannot get a hold of it.
             In the levels of processing model, it is understood that when people first encode new information, they can encode it to various depths. The more deeply the information is encoded, and hence possessed by the cognitive system, the more likely the information is to be retained, especially over the long term. Therefore, memory represents a potentially infinite number of levels, ranging from very shallow to very deep, to which information can be encoded and hence processed. The information can be encoded by noticing whether it is upper or lower case, rhyming each word, or find a synonym for each word. Memory tends to improve for words encoded to the hypothesized greater depths of processing over words encoded at the hypothesized shallower levels of processing.
             Depth of processing is a conception of a series or hierarchy of processing stages. Greater depth implies a greater degree of semantic or cognit...