This model states that a second selection process occurs in the process of receiving information. This mechanism chooses select items to go into short-term memory and our consciousness.
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Unlike the previous models, the Deutsch-Norman theory states that a second selection process occurs in the procedure of determining what is and what is not irrelevant information. In this model, recieved information is filtered for size, proximity, and other factors that determine how much attention is paid to an object, an example being as follows