**TECHNICAL REPORT 2002/111**

*L R Hope, A E Nicholson and K B Korb*

**ABSTRACT**

Unwieldy probability entry interfaces are the norm for Bayesian Network
knowledge engineers. This requires domain experts to provide unreasonably
accurate probability estimates. To solve these problems, we have
developed two applications: *CPTable* improves direct probability
entry, and provides node customisation and sliding scale binary elicitation:
*Verbal Elicitor *allows entry of probability values in ordinary English.
The domain expert selects a verbal cue such as "unlikely" or "almost certain."
The probabilities are then set manually or optimised to minimise probabilistic
incoherency.