Evaluated the distribution of person fit within the computerized-adaptive testing (CAT) environment through simulation. Found that, within the CAT environment, these indexes tend not to follow a standard normal distribution. Person fit indexes had means and standard deviations that were quite different from the expected. (SLD)

Investigated three models that permit restricted examinee control over revising previous answers in the context of adaptive testing, using simulation. Two models permitting item revisions worked well in preserving test fairness and accuracy, and one model may preserve some cognitive processing styles developed by examinees for a linear testing…

Describes the creation of a campus organization at Rutgers University to address the role of social interaction in college drinking based on the Socially Situated Experiential Learning Model. Explains a simulation designed to allow students to participate in the dangerous-drinking prevention campaign by actually designing, implementing, and…

Describes the curriculum and learning objectives for law-related education in high school, middle school, and elementary school. Advocates the use of simulations to teach law-related education. Discusses law-related teacher training and where to find a law-related education resource person. (Contains 14 references.) (PKP)

Examined the effects of test length and sample size on the alternate forms reliability and equating of simulated mathematics tests composed of constructed response items scaled using the two-parameter partial credit model. Results suggest that, to obtain acceptable reliabilities and accurate equated scores, tests should have at least 8 6-point…

Simulations on computers can allow many experiments to be conducted quickly to help students develop an understanding of statistical topics. We used a simulation of a challenging problem in statistics as the focus of an exploration of situations where members of a problem-solving group are physically separated then reconnected via combinations of…

When the item response theory (IRT) model uses the marginal maximum likelihood estimation, person parameters are usually treated as random parameters following a certain distribution as a prior distribution to estimate the structural parameters in the model. For example, both PARSCALE (Muraki & Bock, 1999) and BILOG 3 (Mislevy & Bock,…

Does designing a large academic library Web site for an imaginary person seem a sensible thing to do? As a reference librarian and member of the Web team of the Gerstein Science Information Centre (Gerstein Library), that is exactly what this author set out to do in May 2005. She proposed that the best way to ensure that the Web site meets the…

Students can learn great lessons when placed in decision-making roles. Simulating a Senate confirmation hearing can give students a glimpse of how government works and a chance to evaluate historical figures and issues. Any simulation, however, is an imperfect imitation of a real event. Having to make a decision based on incomplete information…

The Educational Object Economy (EOE) emerged from research on end-user authoring tools for multimedia software and, by 1997, developed into a library of over 2000 freely available interactive simulations for learning. The organization's original goals and its ongoing interest in alternative methods of software authoring led to continuing…

During periods of high unemployment, many workers exhaust their unemployment insurance (UI) benefits before regaining employment. To help alleviate this problem, Congress created the extended benefits (EB) program, expanding the number of weeks of benefits available to UI recipients in high unemployment states. The EB program operates by…

Facts, or skills? Content, or process? Teachers of history and social studies teachers often lock horns over these questions, trying to define the nature of their field and its role in secondary education. Teachers of history often focus on content, presenting the past as a series of important people and events, an accumulated cultural lore that…

After the first observation of life under the microscope, it took two centuries of research before the "cell theory" was established. Luckily, today's teachers can take advantage of computer technology and speed up the discovery process in their classrooms. This article describes how computer-based instructional programs can be used to engage…

This article describes a project in which certain key concepts in probability were explored using graphics calculators with year 10 students. The lessons were conducted in the regular classroom where students were provided with a Casio CFX 9850 GB PLUS graphics calculator with which they were familiar from year 9. The participants in the…

Ignoring a level can have a substantial impact on the conclusions of a multilevel analysis. For intercept-only models and for balanced data, we derive these effects analytically. For more complex random intercept models or for unbalanced data, a simulation study is performed. Most important effects concern estimates and corresponding standard…