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…

Eighteen adult listeners assessed whether stuttering samples were authentic or simulated. Results support the concepts that the production of stuttered and nonstuttered speech disruptions are experienced as being qualitatively different; only stutterers can validly recognize the difference, and only when it occurs; stuttering is a…

This article presents a queuing model simulation of scientific productivity utilizing critical path analysis. Creativity is found to have a large positive effect, a negative effect, or no effect on productivity, depending on the stage of the problem-solving process to which it is applied and the nature of the bottlenecks inherent to the specific…

This paper discusses the problem of feedback in hearing aids and offers examples based on a computer simulation of hearing aid behavior. The available technology for dealing with feedback is reviewed, and the new digital signal-processing approaches which may finally solve the feedback problem are described. (Author/DB)

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)

Explains an experiment in text-searching retrieval for cancer questions which developed and used computer procedures (via human simulation) to select search words from medical dictionaries. This study is based on an earlier one in which search words were humanly selected, and the recall results of the two studies are compared. (Author/LRW)

Compared the effectiveness of presenting information on hazardous waste management alternatives during two one-day workshops (on-site visit and simulated slide visit) by using pretest, posttest, and follow-up attitude and comprehension questionnaires. Conclusions and recommendations are presented. (Author/BC)

Requirements for the games and simulations available in economics education surveyed range from simple equipment to computer facilities. Some attempts at game and simulation evaluation are summarized and criticized in general and in the context of economics education. Comments on the evolving literature on principles of game design are included.…

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)

Developed and tested the Safety Simulator, a new assessment of science teachers' knowledge of school lab safety management based on Interactive Videodisc Technology. Reports that reliability of scores for the four different categories of lab safety (physical facilities, chemicals, lab techniques, and students' behavior) were found to be moderate…