KSL-86-50 + redirect page
Thinking Backward for Knowledge Acquisition + Has identifier
Thinking Backward for Knowledge Acquisition + Ksl tr id
Thinking Backward for Knowledge Acquisition + Number
| Thinking Backward for Knowledge Acquisition |
Bibtype
techreport
Has publishing details
Fall,1986
Has title
Thinking Backward for Knowledge Acquisition
Has where published
KSL-86-50
Has year
1986
Title
Thinking Backward for Knowledge Acquisition
Year
1986
Abstract
This article examines the direction in whi … This article examines the direction in which knowledge bases are constructed for diagnosis and decision making. When building an expert system, it is traditional to elicit knowledge from an expert in the direction in which the knowledge is to be applied, namely, from observable evidence toward unobservable evidence - because this direction reflects causal relationships. Therefore, we argue that a knowledge base be constructed following the expert's natural reasoning direction, and then reverse the direction for use. This choice of representation direction facilitates knowledge acquisition in deterministic domains and is essential when a problem involves uncertainty. We illustrate this concept with influence diagrams, a methodology for graphically representing a joint probability distribution. Influence diagrams provide a practical means by which an expert can characterize the qualitative and quantitative relationships among evidence and hypotheses in the appropriate direction. Once constructed, the relationships can easily be reversed into the less intuitive direction in order to perform inference and diagnosis. In this way, knowledge acquisition is made cognitively simple; the machine carries the burden of translating the representation. burden of translating the representation.
Author
Ross D. Shachter and David Heckerman +
Has author
Ross D. Shachter and David Heckerman +
Has identifier
Thinking Backward for Knowledge Acquisition +
Institution
Knowledge Systems, AI Laboratory +
Ksl tr id
Thinking Backward for Knowledge Acquisition +
Month
Fall +
Number
Thinking Backward for Knowledge Acquisition +
Process note
YES +
Categories KSL Technical Report +, Publication +, Technical Report +
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