To assess problems in hypothesis testing and model comparisons based on normed indices caused by latent class models with sparse contingency tables, a simulation was carried out investigating the distributions of the likelihood ratio statistic, the Pearson statistic chi-square, and a new goodness of fit statistic. (SLD)

Accuracy of three exact person tests for assessing model-data fit in the Rasch model was investigated in a simulation study. Empirical Type I error rates and statistical power of the person tests were computed. The exact person test conditioned on total score is a promising tool for assessing consistency of response patterns with the Rasch model.…

The phenomenon of simultaneous differential item functioning (DIF) amplification and cancellation and the role of the SIBTEST approach in detecting DIF are investigated with a variety of simulated test data. The effectiveness of SIBTEST is supported, and the implications of DIF amplification and cancellation are discussed. (SLD)

Offers a relatively simple analysis of the asymmetrical "sticking" and rolling behavior of two balls, one steel and one rubber, on an incline. Describes an Interactive Physics (TM) simulation designed to study the problem and gives rough experimental results. (WRM)

This study examined the effectiveness and efficiency of a three-dimensional virtual-reality simulation model designed to train kindergarten teachers in the understanding of kindergarten children's needs and perceptions. Results of statistical analysis indicated that the virtual-reality simulation was more effective than a workshop method.…

Speculates on the place of computers and defining the student-computer relationship within the context of biology education. Discusses the value of computer simulations. (DDR)

Describes the development of a Web-based multimedia delivery method of increasing students' interest in artificial intelligence (AI). The course material features an integrated simulation environment that allows students to develop and test AI algorithms in a dynamic and uncertain visual environment. Evaluated the effect of the simulation on the…

Discusses systems dynamics (SD) and considers the types of learning environments that can be designed on the basis of SD models. Highlights include social systems theory; classical systems theory and autopoietic systems theory; models of social systems; computer-based learning environments; simulation modes; and participative design of interactive…

Software agents are computer programs that run in the background and perform tasks autonomously as delegated by the user. This paper blends models from marketing research and findings from the field of decision support systems to build a framework for the design of software agents to support in e-commerce buying applications. (Contains 35…

Examines effects of deductive versus inductive learning strategies on performance, comprehension monitoring, and response confidence, using combinations of computer-based tutorials and simulations of Newton's laws of motion. Participants were 353 fifth graders. Deductive learning was defined as the tutorial combined with the structured or…

Discusses the impact of current simulation laboratories on dental education and reviews advanced technology simulation that has recently become available or is in the developmental stage. Addresses the abilities of advanced technology simulation, its advantages and disadvantages, and its potential to affect dental education. (EV)

Discussion of communicative competence in second language acquisition focuses on a theoretical and practical meshing of simulation and gaming methodology with theories of foreign language acquisition, including task-based learning, interaction, and comprehensible input. Describes experiments conducted with computer-assisted simulations in…

Shows how some of the simple ideas in complexity can be investigated using a spreadsheet and a macro written in Visual Basic. Shows how the sandpile model of Bak, Chao, and Wiesenfeld can be simulated and animated. The model produces results that cannot easily be predicted from its properties. (Author/MM)

A critical issue related to the use of simulation environments in school-based learning is the relationship between the use of these environments and the structure of traditional curricula. Teachers are often caught in the bind of attempting to address significantly raised standards for what all students should know, yet receiving very little…

This article presents Virtual Radiopharmacy Laboratory (VR LAB), a virtual laboratory accessible through the Internet. VR LAB is designed and implemented in the framework of the VirRAD European project. This laboratory represents a 3D simulation of a radio-pharmacy laboratory, where learners, represented by 3D avatars, can experiment on…