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Towards a Model of Context for Case-Based Diagnostic Problem Pinar ztrk and Agnar Aamodt

Summary: Towards a Model of Context for Case-Based Diagnostic Problem
Pinar Öztürk and Agnar Aamodt
Department of Informatics, Norwegian University of Science and Technology
N-7055 Trondheim-Dragvoll, Norway
Phone: +47 73598717 Fax: +47 73591733 E-mail: {pinar, agnar}@ifi.ntnu.no
Abstract: This paper presents a model of context based on the roles and elements of various
context types. Two important roles of context are related to the notions of relevance and
focus. The former is important for the quality of the results reached by a problem solving or
learning task, while the latter is important for the performance efficiency of the task. Problem
solving can be viewed as search in a large problem space where search for different entities is
invoked at different stages. Context has a pruning effect on search, increasing proportionally
to the incompleteness of the information at hand. Depending on the type of memory structure
to be searched for, different types of contexts assist the access to memory. We attempt to give
an account of the various types of contexts that facilitate memory access and utilization for
different type of tasks. The criteria for distinguishing between several types of context
elements are presented, and a context ontology based on these criteria is suggested. We then
show how this account is integrated with a case-based approach to clinical problem solving.
1 Introduction
A strong motivation for research on context is its important role in information processing. It is


Source: Aamodt, Agnar - Department of Computer and Information Science, Norwegian University of Science and Technology


Collections: Computer Technologies and Information Sciences