This paper introduces the language associated with a polygon microworld called Polygon R&D, which has the mathematical crispness of Logo and has the discreteness and simplicity of a Turing machine. In this microworld, polygons serve two purposes: as agents (similar to the turtles in Logo), and as data (landmarks in the plane). Programming the…

Using computer simulation, the authors assessed the accuracy of J. E. Hunter, F. L. Schmidt, and H. Le's (2006) procedure for correcting for indirect range restriction, the most common type of range restriction, in comparison with the conventional practice of applying the Thorndike Case II correction for direct range restriction. Hunter et…

This article provides technical descriptions of five fixed parameter calibration (FPC) methods, which were based on marginal maximum likelihood estimation via the EM algorithm, and evaluates them through simulation. The five FPC methods described are distinguished from each other by how many times they update the prior ability distribution and by…

There is intense interest in computer games. A total of 65 percent of all American households play computer games, and sales of such games increased 22.9 percent last year. The average amount of game playing time was found to be 13.2 hours per week. The popularity and market success of games is evident from both the increased earnings from games,…

This report provides a brief summary of the research projects that have been conducted to support the development of the new SAT.

The two separate projects described have examined how teachers exploit computer-based technologies in supporting learning of science at secondary level. This paper examines how pedagogical approaches associated with these technological tools are adapted to both the cognitive and structuring resources available in the classroom setting. Four…

This article describes a process of role-playing simulation (RPS) as it was used during an educational exercise in community dialogue in the Karkonosze Mountains region of southwest Poland. Over the past decade Karkonosze National Park, a regional tourist magnet, has provided an excellent example of environmental conflict emerging from the…

This article evaluates the effectiveness of using a simulation in an English for Academic Purposes (EAP) class at a university in the United States and discusses the integration of simulations into the Malaysian curriculum. A new approach is needed in Malaysia wherein language learners are given maximum exposure to the language. The article…

This article discusses the use of a conference format in teaching a required English composition course. The focus of the course is student research and presentation; thus, simulating a conference was a natural fit for the course's overall goals. Students worked in one of four committees: the Call for Proposals Committee, the Proposal Evaluation…

The notions cognitive space and cognitive/mental maps were proposed in the late 1940s, and have been extensively studied since the 1970s within behavioral geography, as well as within tangent disciplines, notably environmental psychology and architecture. Viewing these notions from the perspective of the 2000s, one can state that the hidden…

Virtual environments, such as online games and web-based chat rooms, increasingly allow us to alter our digital self-representations dramatically and easily. But as we change our self-representations, do our self-representations change our behavior in turn? In 2 experimental studies, we explore the hypothesis that an individual's behavior conforms…

Any professional act will lead to a significant change. How can one make students understand "managing change" as a consequence or as an intended objective? "DECISION IN CASCADE" -- is a Management Computational Game for the Education of University Master Students and Junior Executive -- simulates five economic functions: research and…

A biologically detailed computational model is described of how categorization judgments become automatic in tasks that depend on procedural learning. The model assumes 2 neural pathways from sensory association cortex to the premotor area that mediates response selection. A longer and slower path projects to the premotor area via the striatum,…

Mixture modeling is a widely applied data analysis technique used to identify unobserved heterogeneity in a population. Despite mixture models' usefulness in practice, one unresolved issue in the application of mixture models is that there is not one commonly accepted statistical indicator for deciding on the number of classes in a study…

An eighth grade algebra class used graphing calculators to simulate ecosystems. One simulation introduced mathematical chaos. The activities exposed the students to nonlinear patterns and modeling. The rate-of-change investigations related the ideas of intercept and slope to the changing equilibrium. The chaotic model intrigued them and was useful…