The purpose of this study was to empirically test the posit that students who participated in a contextualized, mathematics-enhanced high school agricultural power and technology (APT) curriculum and aligned instructional approach would not differ significantly (p less than 0.05) in their technical competence from students who participated in the…

Models of a psychological process can be difficult to discriminate experimentally because it is not easy to determine the values of the critical design variables (e.g., presentation schedule, stimulus structure) that will be most informative in differentiating them. Recent developments in sampling-based search methods in statistics make it…

Background/Context: Much research is being done on Turkish immigrants and their children in Germany and the Netherlands, but almost always from a national perspective. To compare the situation, for example, regarding educational outcomes across the two countries has proved to be very difficult because of different sets, selection criteria, and…

In recent years, the interest grew in research on measuring the "quality of life" (QOL) in cities. This interest comes from the success QOL measurement achieved in understanding communities' needs, tracking changes in different aspects of life and assessing the most desired types of future development among citizens. This research…

We analyse the origin and development of an Experimental Design course which has been taught in several faculties of the Universidad de la Republica and other institutions in Uruguay, over a 10-year period. At the end of the course, students were assessed by carrying out individual work projects on real-life problems, which was innovative for…

This study examines individual, social, and contextual correlates of anxiety sensitivity among African American adolescents living in public housing. The study also reports prevalence of anxiety sensitivity among this population of youth. Participants included 238 African American adolescents (mean age = 15.6) living in three public housing…

D'Eon et al. concluded that change in performance self-assessment means from before to after a workshop can detect workshop success in their and other situations. In this commentary, their recommendation is refuted by showing that (a) self-assessments with balanced over- and underestimations are still biased and should not be used to evaluate…

Animal models have been widely used for studying the physiology and pharmacology of psychiatric and neurological diseases. The concepts of face, construct, and predictive validity are used as indicators to estimate the extent to which the animal model mimics the disease. Currently, we used these three concepts to design a theoretical assignment to…

The purpose of this study was to investigate the relationships among bell schedules, GEE 21 science scores, and cumulative GPAs. Factors under consideration included teacher perspective, gender, ethnicity and students' at-risk status. The researcher collected data from the Louisiana Department of Education (LDE) targeting seven schools for three…

This quantitative study examined the relationships between cultural intelligence (CQ) and four predictor variables: gender, degree level, major, and prior travel abroad, through a post-test only research design. Participants included undergraduate and graduate students enrolled in one of three large, public, research universities in the southeast…

This study examines effects of individual development accounts (IDAs) on household wealth of low-income participants. Methods: This study uses longitudinal survey data from the American Dream Demonstration (ADD) involving experimental design (treatment group = 537, control group = 566). Results: Results from quantile regression analysis indicate…

This report examines theoretical and empirical issues related to the statistical power of impact estimates under clustered regression discontinuity (RD) designs. The theory is grounded in the causal inference and HLM modeling literature, and the empirical work focuses on commonly-used designs in education research to test intervention effects on…

A debate is emerging concerning the use of deception in social science research (especially when it employs experimental methods), driven primarily by the relatively recent move by many economists into experimental work. These economists generally argue that deception should be banned. Deception includes a variety of practices in social science…

This article outlines a framework for analysis of teacher focused policy studies within an international and comparative perspective. Using the notion of the professional life cycle of teachers, the article examines examples of key empirical studies that illustrate the impact of policy on addressing such issues as teacher recruitment, education,…

This article reports on a delicious finding from a recent study claiming a causal link between dark chocolate consumption and blood pressure reductions. In the article, I provide ideas for using this study to whet student appetites for a discussion of statistical ideas, including experimental design, measurement error and inference methods.