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Modelling Rational User Behaviour as Games between an Angel and a Demon

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3 Author(s)
Rukienas, R. ; Dept. of Comput. Sci., Queen Mary, Univ. of London, London ; Curzon, P. ; Blandford, A.

Formal models of rational user behavior are essential for user-centered reasoning about interactive systems. At an abstract level, planned behavior and reactive behavior are two important aspects of the rational behavior of users for which existing cognitive modeling approaches are too detailed. In this paper, we propose a novel treatment of these aspects within our formal framework of cognitively plausible behavior. We develop an abstract, formal model of rational behavior as a game between two opponents. Intuitively, an Angel abstractly represents the planning aspects, whereas a Demon represents the reactive aspects of user behavior. The formalization is carried out within the MOCHA framework and is illustrated by simple examples of interactive tasks.

Published in:

Software Engineering and Formal Methods, 2008. SEFM '08. Sixth IEEE International Conference on

Date of Conference:

10-14 Nov. 2008