Conditioning and updating evidence

E. C. Kulasekere, K. Premaratne, D. A. Dewasurendra, M. L. Shyu, P. H. Bauer

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


A new interpretation of Dempster-Shafer conditional notions based directly upon the mass assignments is provided. The masses of those propositions that may imply the complement of the conditioning proposition are shown to be completely annulled by the conditioning operation; conditioning may then be construed as a re-distribution of the masses of some of these propositions to those that definitely imply the conditioning proposition. A complete characterization of the propositions whose masses are annulled without re-distribution, annulled with re-distribution and enhanced by the re-distribution of masses is provided. A new evidence updating strategy that is composed of a linear combination of the available evidence and the conditional evidence is also proposed. It enables one to account for the 'integrity' and 'inertia' of the available evidence and its 'flexibility' to updating by appropriate selection of the linear combination weights. Several such strategies, including one that has a probabilistic interpretation, are also provided.

Original languageEnglish (US)
Pages (from-to)75-108
Number of pages34
JournalInternational Journal of Approximate Reasoning
Issue number1
StatePublished - Apr 2004


  • Conditioning evidence
  • Dempster-Shafer theory
  • Distributed decision networks
  • Evidential reasoning
  • Updating evidence

ASJC Scopus subject areas

  • Statistics and Probability
  • Electrical and Electronic Engineering
  • Statistics, Probability and Uncertainty
  • Information Systems and Management
  • Information Systems
  • Computer Science Applications
  • Artificial Intelligence


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