Many interventions have been proposed to improve the retention and graduation rates of engineering students. One such intervention is to use study groups for first-year college students; such groups provide a structured environment in which the students can learn course material from each other outside of class and can provide the students with a…

Developing a diagnostic tool within the diagnostic measurement framework is the optimal approach to obtain multidimensional and classification-based feedback on examinees. However, end users may seek to obtain diagnostic feedback from existing item responses to assessments that have been designed under either the classical test theory or item…

Stan is a new Bayesian statistical software program that implements the powerful and efficient Hamiltonian Monte Carlo (HMC) algorithm. To date there is not a source that systematically provides Stan code for various item response theory (IRT) models. This article provides Stan code for three representative IRT models, including the…

Background: Alternative (or continuation) high schools are institutions designed for students at risk for not graduating due to behavioral, educational, or medical problems. The present study explored the relationship between negative substance use consequences (eg, having trouble at school or work) and noncondom use in this at-risk population and…

Movement creativity is a key factor in motor development in children, yet very few exercise programs promote the development of motor creativity in children. To address this gap in the literature, this study tested the effectiveness of a creative exercise program on children's motor and cognitive creativity, and their probability of adaptation to…

This article explores the ways in which the quantitative and qualitative tools used by risk managers can help students think critically about issues. In particular, it identifies some of the quantitative skills used for risk assessment that can be taught and used in mathematics and science classes. It also examines the qualitative knowledge of…

Studies of psychological distress (PD) in university students have shown that they have high prevalence rates. These findings have raised concerns that PD may be leading to poorer student outcomes, such as elevated dropout rates. The aim of this study was to examine the association of PD in undergraduate university students with the competing…

With the projected radiography healthcare worker shortfall, improved program completion is essential in order to meet workforce needs. The purpose and the specific research question addressed in this study was "Is there an association between completing the pre-admission requirements prior to beginning core radiography courses and Radiography…

This paper attempts to quantify the accuracy limit of "nextitem-correct" prediction by using numerical optimization to estimate the student's probability of getting each question correct given a complete sequence of item responses. This optimization is performed without an explicit parameterized model of student behavior, but with the…

In this article, we review four software packages for implementing propensity score analysis in R: "Matching, MatchIt, PSAgraphics," and "twang." After briefly discussing essential elements for propensity score analysis, we apply each package to a data set from the Early Childhood Longitudinal Study in order to estimate the…

This study investigates the role of probabilistic grammatical constraints on the dative alternation in English as a second language (ESL). It presents the results of an experiment in which the different factors that are influential in first language (L1) English are tested with advanced learners of English whose L1 is German. Second language (L2)…

In this work we are going to present how an interactive platform can be used as a powerful tool to allow students to better explore a foundational problem in quantum chemistry: the application of the variational method to the dihydrogen molecule using simple Gaussian trial functions. The theoretical approach for the hydrogen atom is quite…

Students can struggle to understand and use terms that describe probabilities. Such struggles lead to difficulties comprehending classroom conversations. In this article, we describe some specific misunderstandings a group of students (ages 11-12) held in regard to vocabulary such as "certain", "likely" and…

Low completion rates and increased time to degree at U.S. colleges are a widespread concern for policymakers and academic leaders. Many "full time" undergraduates currently enroll at 12 credits per semester despite the fact that a bachelor's degree cannot be completed within 4 years at that credit-load. The "academic momentum"…

Power analysis is a fundamental prerequisite for conducting scientific research. Without power analysis the researcher has no way of knowing whether the sample size is large enough to detect the effect he or she is looking for. This paper demonstrates how psychometric factors such as measurement error and equating error affect the power of…