A poorly designed knowledge base can be as cryptic as an arbitrary program and just as difficult to maintain. Representing inference procedures abstractly, separately from domain facts and relations, makes the design more transparent and explainable. The combination of abstract procedures and relational language for organizing domain knowledge…

The notion of buggy procedures has played an important role in recent cognitive models of mathematical skills. Some earlier work on student modeling used artificial intelligence methods to automatically construct buggy models of student behavior. An alternate approach, proposed here, draws on insights from the rapidly developing field of machine…

A model is presented for item responses when different examinees use different strategies to arrive at their answers and when only those answers, not choice or strategy or subtask results, can be observed. Using substantive theory to differentiate the likelihoods of response vectors under a fixed set of solution strategies, responses are modeled…

The major potentials and pitfalls of adversary evaluation in education are discussed. Reasons why the courtroom model may have limited utility, and the difficulties in the debate model are identified. It is argued that the existence of opposing viewpoints is the core of adversary evaluation, not adherence to existing formats for presenting…

A reconceptualization of the choice model developed by Restle is proposed which involves a reformulation of the choice situation, consideration of absolute constraints, and a distinction between positively and negatively valued aspects of alternatives. Incorporation of these features results in four different models. (Author)

Relates J.P. Guilford's model of problem solving to the negotiation of a reference question. (PF)

Presents a schema to replace the generally accepted notion of the scientific method being described as an individual scientist's behavior. The schema is described as the summary process by which scientific understanding of the universe is advanced, how knowledge is created and tested, and how workable models emerge. (EB)

The relationship between transformation problem performance and Guilford Structure of Intellect (SI) abilities is explored. During two group sessions 42 females and 35 males, age 18-39, were administered 12 Guilford SI tests exemplifying all five symbolic content (numeric) operations, and three contents in the divergent production area. Logical…

A module is presented which instructs the reader in the following activities: (1) identification of a researchable problem, (2) preparation of a research proposal, (3) selection of appropriate research tools and methods, (4) identification of different kinds of variables in research, (5) preparation of a research report, (6) drawing of conclusions…

Dawson, Fairfax County/U.S.A. is a hypothetical community developed by the authors as a teaching aid for undergraduate and graduate courses in environmental engineering, providing a context for problem solving and role playing. It was contrived to provide students opportunities to: (1) identify important community relationships, (2) appreciate the…

Presents two diagrams that model the communication process used by a learner solving academic problems. (PF)

Models relating individual and group problem solving solution times under the condition of limited time (time limit censoring) are presented. Maximum likelihood estimation of parameters and a goodness of fit test are presented. (Author/JKS)

A behavioral consultation school psychology service model is presented which provides a vehicle for services and communication of process and outcome measures in program evaluation research. The consultation model promotes process and outcome evaluation, leads to use of an applied research technology, and provides a communication technology for…

A strategy is proposed to function as a set of heuristics which may be applied to any instructional development model for the purpose of coordinating client and developer needs and goals in respect to the solution of a particular instructional problem. (Author)

Discusses some theorems and properties of figures produced when circles are tangent to one another. (GA)