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Important News and Dates
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12 January 2010
DBL Interactive Version 2.0 Released
DBL Interactive Version 2.0 is now available. Contact us to order licences for DBL Interactive.
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 Home > Features > Support for Probability Elicitation from Experts
Support For Probability Elicitation from Experts
DBLi's built-in CPT Calculator allows you to reduce the number of probabilities you need to elicit from experts when populating large CPTs using expert opinion.
You can use the CPT Calculator on any child node in a network. It works by reducing the number of scenarios (rows) in a CPT down to produce a reduced CPT. This reduced CPT contains the minimum number of scenarios required to estimate the influence that each parent node will have on the probabilities in the CPT. You then ask your expert to complete the probabilities for the reduced CPT. Once this is done, you can click on the calculate CPT button and the CPT calculator will interpolate probabilities for the full CPT based on the probabilities entered into the reduced CPT. Before the CPT calculator interpolates the full CPT, it checks the logical consistency of the probabilities entered into the reduced CPT. If there are any inconsistencies, it will ask you to adjust the probabilities in the reduced CPT before proceeding.
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