The present investigation developed power curves for two parametric and two nonparametric procedures for testing the equality of population variances. Both normal and non-normal distributions were considered for the two group design with equal and unequal sample frequencies. The results indicated that when population distributions differed only in…

The purpose of this evaluation of DEMOS, a system for decision modeling and uncertainty analysis, was to identify some generic issues of interest in the design of such information systems, obtain insights about the causes of problems in their use, and to suggest hypotheses about how to deal with them. (EM)

Describes the Pedagogical mode of instruction developed for the U.S. Army's Videodisc Interpersonal Skills Training and Assessment project, which utilizes standardized role playing simulation with immediate feedback after each decision point to teach leadership and counseling skills. Instructional features unique to interpersonal skills training…

Concern has been expressed over the item response theory (IRT) assumption that a person's ability can be estimated in a unidimensional latent space. To examine whether or not the response to an item requires only a single latent ability, unidimensional ability estimates were compared for data generated from the multidimensional item response…

The concept of a qualitative model provides a unifying perspective for understanding how expert systems differ from conventional programs. Knowledge bases contain qualitative models of systems in the world, that is, primarily non-numeric descriptions that provide a basis for explaining and predicting behavior and formulating action plans. The…

This paper describes a demonstration of an instructional package consisting of original, interactive microcomputer-based simulations and accompanying faculty and student guides designed to assist in teaching introductory psychology. An Apple IIe computer and color monitor were used. The paper contains: (1) a purpose statement; (2) a brief summary…

Describes the simulation of a nearest neighbor searching algorithm for document retrieval using a pool of microprocessors. Three techniques are described which allow parallel searching of a binary search tree as well as a PASCAL-based system, PASSIM, which can simulate these techniques. Fifty-six references are provided. (Author/LRW)

Presents a framework identifying the molecular level assumptions underlying many thermodynamic models. Tests the assumptions using theory and computer simulation to develop better assumptions. (YP)

Money, banking, and macroeconomic textbooks traditionally present the topics of money, the creation of demand deposits by depository institutions, and the Hicksian-Keynesian Theory of Income and Interest separately, as if they were unrelated. This paper presents an integrated approach to those subjects using computer programs written in BASIC, the…

The behavior of two real-time computer simulation models of melody recognition was compared with the performance of human subjects in this study. One of the models, INT1, recognized melodies by comparing specific intervals with stored intervals. The other model, CONT1, performed by comparing the contour of the stimulus melody with an array of…

Children learn arithmetic procedures by rote, rather than by constructing them with an understanding of numbers. Rote learning produces lack of flexibility, nonsensical errors, and other difficulties. Proposed is a theory of conceptual understanding and its role in learning and executing arithmetic procedures. The basic hypothesis is that…

This report of an ongoing research project intended to provide computer assistance to Army units for the scheduling of training focuses on the feasibility of simulated annealing, a heuristic approach for solving scheduling problems. Following an executive summary and brief introduction, the document is divided into three sections. First, the Army…

The problem of this study was to develop, validate, and establish the reliability of a computer simulation which would: (1) distinguish between concrete and formal thinking patterns related to control of variables; (2) be easily administered to a class of secondary school age subjects; (3) preserve the interactive aspects of the Piagetian task;…

Recent research on hypothesis testing strategies (the strategy a person uses to determine the correctness of a specific hypothesis) has produced contradictory results. The three strategies available have been labeled confirmatory, neutral, and disconfirmatory. Some research has found that a confirmatory testing style predominates, while other…

Described in the context of a computer simulation are highlights of a program of research focusing on the storage of mathematics problem solving information in young children's memory and the development of such knowledge structures in older children. Specifically discussed are the problem size effect, the network nature of the memory…