Abstract
Subjects viewed a series of alphanumeric tables containing information regarding the attributes (cost, amount, etc.) of different objects (utilities such as gas and electricity). They answered questions that required them to locate specific pieces of information in the table, perform simple integration between pieces, or complex integration (division, multiplication), and information for questions was either located within a table panel (close separation) or between panels (distant separation). The table was either organized by objects within attributes, or attributes within objects. Table organization had no effect on response time or accuracy. However, accuracy suffered with increased separation, but only for the complex integration questions, a finding that implicates the interference between visual search and the working memory demands of information integration. A computational model of the mental operations required for task performance accounted for 69% of the variance in response time, and provides a useful basis for developing more elaborate models of display layout.
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