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Back to the Fundamentals: Extend the Rational Assumptions

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A Behavioral Economics Approach to Interactive Information Retrieval

Part of the book series: The Information Retrieval Series ((INRE,volume 48))

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Abstract

In this chapter, we revisit the fundamental formal models of IR and associated simplified assumptions, with the goal of exploring and introducing actionable directions toward which the assumptions can be extended to at least partially cover the triggers and characteristics of bounded rationality. To this end, we first categorize different types of explicit and implicit assumptions into three groups, pre-search, within-search, and post-search, and discuss their conflicts with empirical findings on bounded rationality. Within each group, we discuss possible ways to extend and revise existing rational assumptions, as a key preparation for enhancing formal user models and IR evaluation techniques. When explaining the methods for extending rational assumptions, we also discuss related boundaries and explain the implications for user modeling and evaluation and how these potential boundaries are related to IIR-specific factors.

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