Henry M. Halff

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This study provides a numerical representation of contextual effects on the meanings of words, constructed from the order judgments of 19 subjects concerning the word "red" in 19 sentences. Subjects judged whether or not the red object mentioned in a sentence was redder than, less red than, or could be equally as red as the red object mentioned in each of(More)
The Experimental Advanced Design Advisor (XAIDA) is a system for the development of computer-based maintenance training. XAIDA acquires knowledge of a device from a subject matter expert and applies common maintenance-training procedures to generate interactive training from the description. XAIDA provides maintenance training in four areas: the physical(More)
Presented here are several techniques for design and development of computer-based adventure games for science education. Among the issues addressed are how subject matter maps to content, generative techniques for problem-solving practice, use of visualization, mechanisms for instructional support, and approaches to game development.
reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. Violations are liable for prosecution under the(More)
The Differential Effects of Stimulus Presentation During Errorand Success-Feedback Intervals in Concept Identification Most viable theories of concept identification hold that the efficiency with which information from previous trials is processed is greater on successes than on errors. Levlne has proposed that subjects process the information on each trial(More)
through 14 March 1982.' The goal of the project was to cfcvelop methods for representing teaching and problem-solving knowledge in computer-based tutorial systems. One focus of the work was formulation of principles for managing a case method tutorial dialogue; the other major focus was investigation of the use of a production rule representation for the(More)
Electronic games have significant potential for overcoming major difficulties in science education, namely, the necessity for practice, the abstract, complex nature of the material, and the sparse opportunities for observation. A role-playing game with a many-layered story that reflects the structure of the domain can use several mechanisms for enhancing(More)
NOTICES This technical paper is published as received and has not been edited by the technical editing staff of the Armstrong Laboratory. When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely Government-related procurement, the United States Government incurs no responsibility or any(More)
A poorly designed knowledge base can be as cryptic as an arbitrary program and just as difficult to maintain. Representing control knowledge abstractly, separately from domain facts and relations, makes the design more transparent and explainable. A body of abstract control knowledge provides a generic framework for constructing knowledge bases for related(More)
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