Three examples of genetics and evolution simulation concerning Mendelian inheritance, genetic mapping, and natural selection are used to illustrate the use of simulations in modeling scientific/natural processes. First described is the HERED series, which illustrates such phenomena as incomplete dominance, multiple alleles, lethal alleles,…

Simulations currently play a key role in facilitating competency training for incident commanders of the emergency services. The article briefly reviews current practice in incident command training and considers the effectiveness of simulation usage and practice for crisis management more generally.

"Economic competitiveness" is at the top of national, regional and global political and economic agendas. Several countries in all regions of the world have established policies and institutions devoted to economic competitiveness, including in developing and transition countries. This leads to the question of how to define national economic…

This article evaluated the impact of a four-lesson science module on the attitudes of secondary school students. This science module (on cancer and modern biotechnology) utilises several design principles, related to a social constructivist perspective on learning. The expectation was that the module would help students become more articulate in…

This research examines the use simulation, "StarPower," as an instrument to teach students about ethics in management and leadership. The paper begins with an overview of sources of learning in leadership and management development and later focuses specifically on the use of simulations. This is followed by a brief explanation of the…

Past estimates of the effect of family income on child development have often been plagued by endogeneity and measurement error. In this paper, we use two simulated instrumental variables strategies to estimate the causal effect of income on children's math and reading achievement. Our identification derives from the large, non-linear changes in…

The contributions of Joseph V. Brady to behavioral pharmacology span more than 50 years and range from early studies using the Estes-Skinner ("conditioned emotional response") procedure to examine drug effects and various physiological processes in experimental animals to the implementation of mobile methadone treatment services and to small group…

Person-fit methods are used to uncover atypical test performance as reflected in the pattern of scores on individual items in a test. Unlike parametric person-fit statistics, nonparametric person-fit statistics do not require fitting a parametric test theory model. This study investigates the effectiveness of generalizations of nonparametric…

According to the recent Nation's Report Card, 12th-graders failed to produce gains on the 2005 National Assessment of Educational Progress (NAEP) despite earning better grades on average. One possible explanation is that 12th-graders were not motivated taking the NAEP, which is a low-stakes test. We develop three Bayesian IRT mixture models to…

The stochastic simulation of chemical reactions, specifically, a simple reversible chemical reaction obeying the first-order, i.e., linear, rate law, has been presented by Martinez-Urreaga and his collaborators in this journal. The current contribution is intended to complement and augment their work in two aspects. First, the simple reversible…

Criteria had been proposed for assessing the severity of possible test security violations for computerized tests with high-stakes outcomes. However, these criteria resulted from theoretical derivations that assumed uniformly randomized item selection. This study investigated potential damage caused by organized item theft in computerized adaptive…

I examine the impact of simulations on student learning and on the growth of civic competence in an introductory American government class. By civic competence, I refer to an individual's skill and ability to make sense of vast amounts of political information; to work with others (and in civil opposition to other people's ideas) where…

We developed driving restrictions that are linked to specific driving errors, allowing cognitively impaired individuals to continue to independently meet mobility needs while minimizing risk to themselves and others. The purpose of this project was to evaluate the efficacy and duration expectancy of these restrictions in promoting safe continued…

Objective: A single study tested the hypothesis that simulated practice interviews for investigative interviewers of children are more effective when the role of the child respondent is played by trained actors (i.e., postgraduate psychology students) than untrained fellow participants (i.e., child protection workers). Method: The interviewers…

Defense contractors Northrop Grumman Corp. and Lockheed Martin Corp. are joining forces in an innovative partnership to develop high-tech simulations to boost STEM--or science, technology, engineering, and mathematics--education in the Baltimore County schools. The Baltimore County partnership includes the local operations of two major military…