In this simulation study, we investigate the power and Type I error rate of a procedure based on the mean and covariance structure analysis (MACS) model in detecting differential item functioning (DIF) of graded response items with five response categories. The following factors were manipulated: type of DIF (uniform and non-uniform), DIF…

Drawing on narrative theory, we propose a scenario-based approach to conducting discussions among junior and senior faculty about issues affecting job satisfaction. This study reports how discussions of fictional scenarios (based on data drawn from 123 faculty interviews) prompt open dialogue, foster greater consciousness, empathy, and empowerment…

Content and thematic analyses were used to examine women's written responses to a hypothetical attempted sexual assault. A community sample (N=371) participated in an experiment examining the effects of alcohol on sexual assault resistance. Women received a high-dose alcohol, low-dose alcohol, placebo, or control beverage and then projected…

A new test index is defined as the probability of obtaining two randomly selected test scores (PDTS) as statistically different. After giving a concept definition of the test index, two simulation studies are presented. The first analyzes the influence of the distribution of test scores, test reliability, and sample size on PDTS within classical…

Canada's $76.5 billion annual investment in education is paying dividends. A recent international survey ranked Canadian students "second" in reading literacy, "fifth" in mathematics and "fifth" in science. For nations and individuals alike, such mastery is intrinsic to success in the new knowledge economy. Yet,…

Why are some words easier to learn than others? And what enables the eventual learning of the more difficult words? These questions were addressed for nouns using a paradigm in which adults were exposed to naturalistic maternal input that was manipulated to simulate access to several different information sources, both alone and in combination:…

As cognitive architectures move to account for increasingly complex real-world tasks, one of the most pressing challenges involves understanding and modeling human multitasking. Although a number of existing models now perform multitasking in real-world scenarios, these models typically employ customized executives that schedule tasks for the…

Because of the importance of diplomacy, it is a valuable subject for the social studies classroom. In a crowded curriculum, however, the art of international diplomacy can easily get less attention than it deserves. One way of teaching it is to focus on the diplomacy associated with a major event that is part of the typical history curriculum. The…

The atmospheric issue of acid rains is subjected to a five-part laboratory experiment by concentrating on the chemistry of the infiltration process of acid rainwater through soils. This procedure of quantitative scrutiny helps students realize the efficacy of soil minerals in the consumption of surplus acidity in rainwater.

Do humans integrate experience on specific routes into metric survey knowledge of the environment, or do they depend on a simpler strategy of landmark navigation? The authors tested this question using a novel shortcut paradigm during walking in a virtual environment. The authors find that participants could not take successful shortcuts in a…

The potential for using virtual environments (VEs) in educational contexts for people with autistic spectrum disorders (ASDs) has been recognized. However, very little is known about how people with ASDs interpret and understand VEs. This study aimed to investigate this directly with a group of 12 adolescents with ASDs, each individually matched…

Differential item functioning (DIF) analyses are used to identify items that operate differently between two groups, after controlling for ability. The Simultaneous Item Bias Test (SIBTEST) is a popular DIF detection method that matches examinees on a true score estimate of ability. However in some testing situations, like test translation and…

According to a recent theory, anterior cingulate cortex is sensitive to response conflict, the coactivation of mutually incompatible responses. The present research develops this theory to provide a new account of the error-related negativity (ERN), a scalp potential observed following errors. Connectionist simulations of response conflict in an…

A simulated baseball batting task was used to compare the relative effects of attending to extraneous information (tone frequency) and attending to skill execution (direction of bat movement) on performance and swing kinematics and to evaluate how these effects differ as a function of expertise. The extraneous dual task degraded batting…

One topic that is frequently taught at any and all grade levels is elections, particularly during presidential election years. There are numerous organizations that produce materials and maintain websites to help students at all grade levels learn about and even participate in mock election activities. There is, however, one aspect of elections…