Universal Principles of Design, Revised and Updated
by William Lidwell, Kritina Holden, Jill Butler
Interference Effects
A phenomenon in which mental processing is made slower and less accurate by competing mental processes.
Interference effects occur when two or more perceptual or cognitive processes are in conflict. Human perception and cognition involve many different mental systems that parse and process information independently of one another. The outputs of these systems are communicated to working memory, where they are interpreted. When the outputs are congruent, the process of interpretation occurs quickly and performance is optimal. When outputs are incongruent, interference occurs and additional processing is needed to resolve the conflict. The additional time required to resolve such conflicts has a negative impact on performance. ...
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