... it is the visual and the auditory stimuli that are of the most interest to cognition. The echoic memory lasts longer than the iconic memory. The following model represents Atkinson's and Shiffrin's model of memory as they proposed in 1968. Sensory memory Information in the sensory memory exist for a very short period of time. If we don't concentrate on the information it is most likely that it will decay. For example, when reading a book or some sort of paper, you might focus so hard on your reading that you are totally unaware of the noises around you. You can only distinguish the different sounds if you pay attention to them. A classic example of this is when you are trying to do a task and listen to a person simultaneously. When the person next to you says something, you answer, "oh, what did you say?" A few seconds later you ...

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