Accession Number:

ADA162223

Title:

Acquiring, Representing, and Evaluating a Competence Model of Diagnostic Strategy.

Descriptive Note:

Technical rept.,

Corporate Author:

STANFORD UNIV CA DEPT OF COMPUTER SCIENCE

Personal Author(s):

Report Date:

1985-08-01

Pagination or Media Count:

93.0

Abstract:

NEOMYCIN is a computer program that models one physicians diagnostic reasoning within a limited area of medicine. NEOMYCINs diagnostic procedure is represented in a well-structured way, separately from the domain knowledge it operates upon. We are testing the hypothesis that such a procedure can be used to simulate both expert problem-solving behavior and a good teachers explanations of reasoning. The model is acquired by protocol, analysis, using a framework that separates an experts causal explanations of evidence from his descriptions of knowledge relations and strategies. The model is represented by a procedural network of goals and rules that are stated in terms of the effect the problem solver is trying to have on his evolving model of the world. The model is evaluated for sufficiency by testing it in different settings requiring expertise, such as providing advice and teaching. The model is evaluated for plausibility by arguing that the constraints implicit in the diagnostic procedure are imposed by the task domain and human computational capability. This paper discussed NEOMYCINs diagnostic procedure in detail, viewing it as a memory aid, as a set of operators, as proceduralized constraints, and as a grammar.

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE