Virtual reality is a three-dimensional, participatory, multisensory, computer-based simulated environment occurring in real time. Applied to instruction, it has the potential to revolutionize teaching and learning processes. Dialogue must begin for development of a national agenda to link this technology with higher education, addressing…

Four bootstrap methods are identified for constructing confidence intervals for the binomial-error model. The extent to which similar results are obtained and the theoretical foundation of each method and its relevance and ranges of modeling the true score uncertainty are discussed. (SLD)

The University of Illinois' medical school has a third-year program of weekly role-playing exercises focusing on management of acute medical problems. Students are responsible for creating the cases, complete with scenarios and treatment teams, simulating them, and successfully treating or reaching an impasse. Little teacher preparation time is…

Presents results of a study of whether simulation leads to improved understanding of economic concepts among fifth grade students. Reports that simulations were used in instructing 300 children in 10 classes in the southeastern United States. Concludes that the use of simulations and role-playing activities increased student performance in…

A procedure is introduced for determining the effect of testlet nonequivalence on operating characteristics of a testlet-based computerized mastery test (CMT). The procedure, which involves estimating the CMT decision rule twice with testlet likelihoods treated as equivalent or nonequivalent, is demonstrated with testlet pools from the Architect…

Simulation training and a prompt hierarchy were found to facilitate acquisition of clean intermittent self-catheterization skills by a four-year-old male with myelomeningocele. The child was first taught to perform catheterization on a doll, then on himself. Skills were clustered into three tasks of diapering, cleansing, and catheterization.…

At Boston College (Massachusetts), chemistry faculty are incorporating advanced technology into the classroom to motivate students to further study. A new $31 million chemistry center allows computer-based simulated experiments, computer-assisted instruction, and advanced graphics for visualization. Despite use of incentives, some student…

Presents low-cost learning activities to help teach elementary students about the earth's magnetic field. One project has students make a model of the earth's magnetic field. Another has them experiment with magnetism. (SM)

A method is suggested to estimate the relationship between a latent trait and one or more manifest predictors without estimating subject parameters. The method, developed for the Rasch model, can be generalized to two-parameter and three-parameter logistic latent trait models. The model is illustrated with simulated and empirical data. (SLD)

The polytomous unidimensional Rasch model with equidistant scoring (rating scale model) is extended so that two parameters are linearly decomposed into certain basic parameters. A conditional maximum likelihood estimation procedure and a likelihood ratio test are presented in the context of the extended model (linear rating scale model). (SLD)

Discusses the use of simulations in education and suggests ways in which they can be made more cost effective. Highlights include electronic performance support systems; smart tools; examples of the use of simulations in an electronics laboratory and for interpersonal problem-solving skills; and computer-aided instructional design. (Contains 11…

Describes computer software intended to help students understand the factors that determine their risk of HIV infection (ZWH)

Through Monte Carlo simulation, respective normative and intuitive strategies for covariation assessment and Bayesian inference are compared. Results indicate that better performance in both tasks results from considering alternative hypotheses, although not necessarily using a normative strategy. Conditions under which intuitive strategies may be…

A computer program that simulates the random evolution of a metabolic pathway is given. The program shows that natural selection preserves favorable traits if they occur in a specific sequence. (KR)

When repeated observations are taken at equal time intervals, a simple form of a stationary time series structure may be fitted to the observations. Use of correction factors is discussed. A computer simulation method is used to investigate power advantages of fitting a serial correlation pattern to repeated observations. (TJH)