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 ABSTRACT
The paper examines the extralinguistic factors that influence user behavior with online information systems. Extralinguistic factors include any interface features which are “outside” how users understand and comprehend written texts online. Extralinguistic features, therefore, are interface features that support (1) how users formulate their information goals or represent their tasks, (2) how users navigate to new or related topics of interest to them, and (3) how users quickly scan (rather than read) online information. It is argued that text comprehension is only one task that users engage in when using online information systems. A model of online user behavior that includes goal setting, navigating, scanning, and text comprehension is outlined. I argue that a broader definition of online information use is necessary and discuss various design principles for avoiding communication breakdowns beforeusers reach their desired information. Finally, I conclude by suggesting that a Participatory Design Approach to the design of human-computer interfaces is one method of undermining our tendency, as software designers, to apply design advice and guidelines without first accounting for user tasks and information goals.
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