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Information Foraging TheoryAdaptive Interaction with Information$
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Peter L. T. Pirolli

Print publication date: 2007

Print ISBN-13: 9780195173321

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780195173321.001.0001

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A Cognitive Model of Information Foraging on the Web

A Cognitive Model of Information Foraging on the Web

Chapter:
(p.89) 5 A Cognitive Model of Information Foraging on the Web
Source:
Information Foraging Theory
Author(s):

Peter Pirolli

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195173321.003.0005

This chapter presents SNIF-ACT (Scent-based Navigation and Information Foraging in the ACT architecture), which is a cognitive model that implements the rational analysis of Web-foraging within the constraints of a computational cognitive architecture. SNIF-ACT is a production system model that employs a spreading activation model of information scent to determine which browsing actions and stopping decisions to take. Spreading activation is assumed to operate on a large associative network that represents the Web user's linguistic knowledge. These networks can be constructed using statistical estimates from large and representative samples of the linguistic environment. SNIF-ACT is fitted to data from Web-foraging users in two detailed studies, providing detailed moment-by-moment tracing of individuals as well as emergent aggregate phenomena.

Keywords:   SNIF-ACT, ACT-R, cognitive model, World Wide Web, information scent, information foraging, production system

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