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Etude de l'effet du conflit multicritère sur l'expression des préférenes : Une approche empirique

Abstract : The research presented in this thesis lies in the field of multicriteria decision aid. This field deals with decision in a context where several aspects, usually in conflict, are considered when judging the alternatives. Our work stands in the descriptive approach and aims at observing the effect of multicriteria conflict on the preferences expressed by decision-makers. First, we propose a definition of the intensity of inter-alternative multicriteria conflict and then we consider incomplete preferences and identify two types of incomplete preference models. Our main contribution is then to observe and analyse the effect of conflict when assessing the preferences of a decision-maker. In order to do so, we designed and led two experiments allowing to test the assessment of preferences through pairwise comparisons and matchings. The first experiment allows us to exhibit an intransitivity of indifference along isopreference chains. A large multicriteria conflict leads subjects to express incomplete preferences. Results obtained from this experiment are under publication (Deparis et al. [2012]). The second experiment allows us to show that asymmetries already observed in the literature in response to bimatchings are strongly amplified by multicriteria conflict. We discuss the implications of these results on elicitation of preferences. Finally, we analyse the experimental results with regard to the lability of preferences that they reveal. Beyond this contribution, our thesis sheds a light on the interactions that exist between the normative, descriptive and prescriptive approaches in multicriteria decision-making.
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Submitted on : Wednesday, October 10, 2012 - 4:00:57 PM
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Stéphane Deparis. Etude de l'effet du conflit multicritère sur l'expression des préférenes : Une approche empirique. Autre. Ecole Centrale Paris, 2012. Français. ⟨NNT : 2012ECAP0029⟩. ⟨tel-00740658⟩

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