A Monte Carlo study examined the statistical performance of single sample and bootstrap methods that can be used to test and form confidence interval estimates of indirect effects in two cluster randomized experimental designs. The designs were similar in that they featured random assignment of clusters to one of two treatment conditions and…

Recently, nonparametric methods have been proposed that provide a dimensionally based description of test structure for tests with dichotomous items. Because such methods are based on different notions of dimensionality than are assumed when using a psychometric model, it remains unclear whether these procedures might lead to a different…

Many important research hypotheses concern conditional relations in which the effect of one predictor varies with the value of another. Such relations are commonly evaluated as multiplicative interactions and can be tested in both fixed-and random-effects regression. Often, these interactive effects must be further probed to fully explicate the…

In the context of reviewing an article for this journal (van der Linden & Sotaridona, this issue, pp. 283-304) the topic of unconditional and conditional hypothesis testing came under consideration. While this is hardly a new issue (consider, for example, arguments regarding the chi square vs. Fisher exact test of independence for a 2 x 2…

The authors propose new procedures for evaluating direct, indirect, and total effects in multilevel models when all relevant variables are measured at Level 1 and all effects are random. Formulas are provided for the mean and variance of the indirect and total effects and for the sampling variances of the average indirect and total effects.…

There has been renewed discussion of the scientific method, with many voices arguing that it presents a very limited or even wholly incorrect image of the way science is really done. At the same time, the idea of a scientific method is pervasive. This article identifies the scientific method as a simple model for the process of scientific inquiry.…

This study examined the relative benefit of three interventions (i.e. physiological, behavioural, and pragmatic) designed to facilitate speech recognition software use. Participants were 15 adults with dysarthria associated with a variety of aetiological conditions, including cerebral palsy, Parkinson's disease, and motor neuron disease. Results…

The authors examine an institutional assessment model for general education that effectively incorporates instructor-driven strategies. This article is informed by the perspectives of a teaching librarian and a departmental faculty member at the University at Albany, State University of New York. As instructors, they both participated in mandated…

Background: Students are unable to benefit from many school programs designed to address their mental health needs if their parents do not consent to their participation. As part of an ongoing effort in a large urban school district to meet the mental health needs of students traumatized by violence exposure, this paper examines the impact of…

Frank Aydelotte is best remembered for developing in the 1930s and 1940s the nation's most innovative and influential honors program, based on the education he received as a Rhodes Scholar at Oxford. As coordinator of freshman English at Indiana University, Aydelotte attacked the dominant Harvard model of instruction while promoting a method…

Based on the idea that certain critical skills mark the thoughtful person, inform the workplace, and provide for lifelong learning, this book provides classroom teachers with the ability to teach various subjects to students in a manner that simultaneously develops students' critical thinking, reading, writing, listening, and speaking skills. A…

Conflict-mitigation is a concept and methodology that emphasizes a broad societal understanding of conflicts obtained mainly through in-depth interviewing with many and varied actors. Developed through the work by the Transnational Foundation for Peace and Future Research (TFF), the conflict-mitigation process is intended to serve a number of…

The trend to distributed processing is being fueled by numerous forces, including advances in technology, corporate downsizing, increasing user sophistication, and acquisitions and mergers. Increasingly, the trend in corporate information systems (IS) departments is toward sharing resources over a network of multiple types of processors, operating…

Seven features of valid classroom observations procedures, a five-step measurement schemata, and a systematic classroom observation procedure designed to reduce measurement error are presented. The following features are addressed: (1) the inference of the observation is established a priori and confirmed post hoc; (2) craft knowledge and…

A study explored issues regarding the selection of a Q sample in three studies using Stephenson's Q technique or Q methodology: a current study on initial interaction in interpersonal communication; a second study on the effects of alcohol use on interpersonal communication (these two studies are in progress and are the outgrowth and work of two…