Results are reported from a study designed to determine whether computer-based teaching simulation could influence short- and long-term skill acquisition in 61 preservice teachers. Two factors (task realism and clear, immediate post-teaching feedback) are identified as significant contributors to the simulation's training success. (IAH)

Hierarchical Bayes procedures for the two-parameter logistic item response model were compared for estimating item and ability parameters through two joint and two marginal Bayesian procedures. Marginal procedures yielded smaller root mean square differences for item and ability, but results for larger sample size and test length were similar.…

Describes a computer program that can model the equilibrium processes in the production of ammonia from hydrogen and nitrogen, sulfur trioxide from sulfur dioxide and oxygen, and the nitrogen dioxide-dinitrogen tetroxide equilibrium. Provides information about downloading the program ChemEquilibrium from the World Wide Web. (JRH)

Examines the advantages of presenting case study information via multimedia. Highlights identify advantages of using multimedia, including browsability, comprehensiveness, currency, flexibility, linkage, simplicity, precision, closeness to problem, and cost savings. Potential problems are also discussed. (Contains eight references.) (SLW)

Computer simulations indicate that the correlation between baseline and change, by itself, does not invalidate the use of gain scores to measure change, but when the negative correlation is accompanied by decrease in variance from pretest to posttest, covariance is a superior measure of change. (SLD)

Examines four working steps from an empirical model where an expert abstractor discovers what a paper is about and drafts a topic sentence; a simulation system is developed using this model. Discusses knowledge processing activities of professional summarizing. Results indicate that a small simulation model of professional summarizing is feasible.…

Discussion of the changing economic environment and the resulting restructuring of society focuses on changes in education needs. Highlights include evaluative simulations, interactive distance learning in the home and in the workplace using interactive media, and a list of World Wide Web information sources for distance education. (LRW)

Crossroads to the World is an interdisciplinary, teacher-developed, technology-based project involving constructive learning that can be adapted to almost any social-studies curriculum. Beginning with literary models (like Whitman's "Song of the Open Road"), students use simulation software to generate ideas for their own simulated world…

Robustness of the school-level item response theoretic (IRT) model to violations of distributional assumptions was studied in a computer simulation. In situations where school-level precision might be acceptable for real school comparisons, expected a posteriori estimates of school ability were robust over a range of violations and conditions.…

A maximum likelihood approach to correlational outlier identification is introduced and compared to the Mahalanobis D squared and Comrey D statistics through Monte Carlo simulation. Identification performance depends on the nature of correlational outliers and the measure used, but the maximum likelihood approach is the most robust performance…

Describes techniques for using computer-assisted instruction to help students of various ages and needs develop job-related skills. Topics addressed include classroom organization, beginning skills, shopping simulations, other simulations, deciphering signs, social skills, writing activities, and followup. (MES)

Asymptotic distributions of the estimators of communalities are derived for the maximum likelihood method in factor analysis. It is shown that equating the asymptotic standard error of the communality estimate to the unique variance estimate is not correct for the unstandardized case. Monte Carlo simulations illustrate the study. (SLD)

Effects of violating the independence assumption when combining correlation coefficients in a meta-analysis were studied. This Monte-Carlo simulation varied sample size, predictor number, population intercorrelation among predictors, and population correlation between predictors and criterion. Combining statistics from nonindependent data in a…

Describes virtual realities as environments in which visual, aural, or other stimuli generate in the mind of the user a sense of navigable, frameless, three-dimensional space, and predicts that the availability of computer technology to create real-time, three-dimensional graphics will bring radical changes in the educational use of visualization…

The algorithm developed by B. A. Schneider (1980) for analysis of paired comparisons of psychological intervals is replaced by one proposed by R. M. Johnson. Monte Carlo simulations of pairwise dissimilarities and pairwise conjoint effects show that Johnson's algorithm can provide good metric recovery. (SLD)