What is Enough? Satisficing Information Needs
http://www.ingentaconnect.com/content/mcb/jd/2007/00000063/00000001/art00004
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  peer-reviewed

Prabha, Chandra, Lynn SilipigniConnaway, LawrenceOlszewski and Lillie R. Jenkins
Journal of Documentation
2007

Abstract:

This paper seeks to understand how users know when to stop searching for more information when the information space is so saturated that there is no certainty that the relevant information has been identified.