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Communication Dans Un Congrès Année : 2015

Characterization of Scoring Rules with Distances: Application to the Clustering of Rankings

Résumé

Positional scoring rules are often used for rank ag-gregation. In this work we study how scoring rules can be formulated as the minimization of some distance measures between rankings, and we also consider a new family of aggregation methods, called biased scoring rules. This work extends a previous known observation connecting Borda count with the minimization of the sum of the Spearman distances (calculated with respect to a set of input rankings). In particular we consider generalizations of the Spearman distance that can give different weights to items and positions; we also handle the case of incomplete rank data. This has applications in the clustering of rank data, where two main steps need to be performed: ag-gregating rankings of the same cluster into a representative ranking (the cluster's centroid) and assigning each ranking to its closest centroid. Using the proper combination of scoring rules (for aggre-gation) and distances (for assignment), it is possible to perform clustering in a computationally efficient way and as well account for specific desired behaviors (give more weight to top positions, bias the centroids in favor of particular items).
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Dates et versions

hal-01359528 , version 1 (02-09-2016)

Identifiants

  • HAL Id : hal-01359528 , version 1

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Paolo Viappiani. Characterization of Scoring Rules with Distances: Application to the Clustering of Rankings. The Twenty-Fourth International Joint Conference on Artificial Intelligence (IJCAI 2015), Jul 2015, Buenos Aires, Argentina. pp.104-110. ⟨hal-01359528⟩
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