This paper reviews recent results obtained in the medical diagnosis field by adding to a coherent inference process qualitative constraints. Such further considerations turn out to be significant whenever a basic lower-upper conditional probability assessment induces extension bounds too vague to take any decision. Three general types of qualitative judgements are proposed and fully described. They do not constitute a ``panacea" to solve any problematic situation, but their application can considerably improve inferences results in specific fields, as two practical applications show.
Keywords. Coherent inference, conditional exchangeability, qualitative constraints, diagnosis procedures
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Authors addresses:
via Vanvitelli 1
06123 Perugia
Italy
E-mail addresses:
| Andrea Capotorti | capot@dipmat.unipg.it |