Explored the problem of choosing the correct number of clusters in cluster analysis of high dimensional empirical binary data. Findings from a simulation that included 162 binary data sets resulted in recommendations about the number of clusters for each index under consideration. Compared and analyzed the performance of index results. (SLD)

Studied the interrelationships between two sets of data measured on the same subjects via redundancy analysis in a simulation study. Under the hypothesis of multinormality, obtained tests of significance for each successive redundancy component so that only the significant factors are retained for prediction purposes. (SLD)

Presented and evaluated an adjusted Bonferroni method for controlling familywise rate when deleting parameters in specification addition searches. Simulation results show that the adjusted Bonferroni method controlled adequately for Type I errors in the initial addition stage of a two-stage search and with backward selection. (SLD)

Permitting item review is to the benefit of the examinees who typically increase their test scores with item review. However, testing companies do not prefer item review since it does not follow the logic on which adaptive tests are based, and since it is prone to cheating strategies. Consequently, item review is not permitted in many adaptive…

In this qualitative pilot study, the authors report on curriculum field trials within a personal learning environment (PLE) designed by a collaboration of academic researchers and nonprofit volunteers working together in the virtual world of Second Life. The purpose of the PLE is to provide learners less likely to have access to educational…

Critical Chains project management focuses on holding buffers at the project level vs. task level, and managing buffers as a project resource. A number of studies have shown that Critical Chain project management can significantly improve organizational schedule fidelity (i.e., improve the proportion of projects delivered on time) and reduce…

"Harvard Education Letter" is published bimonthly at the Harvard Graduate School of Education. This issue of "Harvard Education Letter" contains the following articles: (1) Online Testing, Version 1.0: Oregon's Adaptive Computer-Based Accountability Test Offers a Peek at a Brave New Future (Robert Rothman); (2) Beyond…

The 2010 Central States Conference on the Teaching of Foreign Languages (CSCTFL) focused on exploring various ways to lead students to become part of an internationally competent workforce. Foreign language educators shared their experiences in investigating various modes of assessment, the use of technology, and techniques to motivate students to…

Web 2.0 is not only for kids anymore, businesses are using it, too. Businesses are adopting Web 2.0 technology for a variety of purposes. In this article, the author discusses how he incorporates Web 2.0 into his business communications course. He describes a project that has both individual and collaborative elements and requires extensive…

Incorporating computer-simulation modelling into project-based learning may be effective but requires careful planning and implementation. Teachers, especially, need pedagogical content knowledge which refers to knowledge about how students learn from materials infused with technology. This study suggests that students learn best by actively…

We implemented a five-week family program called "Family Quest" where parents and children ages 9 to 13 played Quest Atlantis, a multiuser 3D educational computer game, at a local after-school club for 90-minute sessions. We used activity theory as a conceptual and an analytical framework to study the nature of intergenerational play, the…

Young and healthy undergraduates in health education were not predisposed to learn the complex sprawl of topics in a required course on U.S. Health Care. An online simulation of health care reform was used to encourage student learning about health care and participating in health care reform. Students applied their understanding of high costs,…

Transformative learning occurs when students engage in activities that challenge formative assumptions about the world and how it works. The "Family Collaboration Portfolio" was designed as an interactive simulation exercise in which preservice professionals critically examined their assumptions of parenting a child with a disability through…

This article discusses the functions and effectiveness of games and simulations in the learning processes, in particular as an experiential learning methodology. The application of the game Lemonade Tycoon in the development of lean manufacturing concepts is described. This article addresses the use of the game to teach the principles of lean…

Serious virtual worlds (SVWs) represent a great opportunity for learning and should embed a lot of high-quality contextualised information so that the player can take the most from his or her exploration of the environment. This requires defining new methodologies and tools for effective production. We have investigated this issue in implementing…