There is a knowledge base consisting of a set of rules. Expert systems have inference procedures. Rules chained together to allow system to consider a set of hypothesis and attempt to confirm each hypothesis in the set. The system begins by attempting to confirm a rule by searching through knowledge base. This process continues until the system can confirm one or more rules and converge on a solution.
Decisions are products of a dialogue between computer and user.
Begins with inputting of start values. System searches knowledge base to generate whatever additional indicators are needed and requests information from user. When the system converges on a dysfunction, the dysfunction may have certainty factors associated with it. B. We designed a small prototype expert system to discover information about neuropsychological decision-making. Ideal expert system would divide neuropsychological services into 3 tasks Describe neurological dysfunctions, Identify neurological dysfunction, Make recommendations for treatment.