Mechanisms of Attention.
OREGON UNIV EUGENE DEPT OF PSYCHOLOGY
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Control problems of attention theory concern analysis of the source of limitations in processing information, and the mechanisms that control the flow of information from input to output. Early theories of attention suggested a very close link between processes that take time and processes that take attention. But abundant information suggests that at least one time-consuming process, that whereby a stimulus activates familiar associations in memory, demands little or no attention in many instances. Apparently a very wide range of memories within a code and a variety of different codes, such as visual, phonemic, and semantic codes, are activated by the same stimulus. Moreover, more than one stimulus may activate memory at a time. This widespread activation necessitates a limited control process that selects and integrates codes or memories in accordance with goals and task demands.