In causal mediation analysis, the definitions of the natural direct and indirect effects involve potential outcomes that can never be observed, so-called a priori counterfactuals. This conceptual challenge translates into issues in identification, which requires strong and often unverifiable assumptions, including sequential ignorability.…

We use a natural experiment to evaluate sample selection correction methods' performance. In 2007, Michigan began requiring that all students take a college entrance exam, increasing the exam-taking rate from 64 to 99%. We apply different selection correction methods, using different sets of predictors, to the pre-policy exam score data. We then…

Different approaches exist in delivering courses. The traditional face-to-face, the blended approach that combines the strengths of face-to-face with the application of technologies, and the online approach, which is the form of learning that takes place over the Internet. This article reports on the impact of the forced transformation of a data…

Objective: Various statistical methods have been developed to estimate hazard ratios (HRs) from published Kaplan-Meier (KM) curves for the purpose of performing meta-analyses. The objective of this study was to determine the reliability, accuracy, and precision of four commonly used methods by Guyot, Williamson, Parmar, and Hoyle and Henley.…

This study aims to contribute to the development of community-responsive research approaches by describing the research methods used in the RxHL study and the interprofessional and community-based collaboration that produced them. The mixed-method RxHL study was developed in close consultation with staff and providers at our research site, a…

Schools across the United States suffer from low on-time graduation rates. Targeted interventions help at-risk students meet graduation requirements in a timely manner, but identifying these students takes time and practice, as warning signs are often context-specific and reflected in a combination of attendance, social, and academic signals…

Asbury and Wai ("Journal of School Choice," 2019) perform a valuable service by summarizing much available behavior--genetic research on academic achievement. However they consider that no specific policies stem from the research body at this time. Here we do propose a policy based on some of our research using twins, namely that…

A green chemistry experiment is presented for teaching an undergraduate quantitative analysis/analytical chemistry laboratory class through the use of black tea leaf extract for the determination of iron in supplement tablets. Dried tea leaf is a safe, low cost, and widely available source of natural extract that can be used in place of more toxic…

In this study, primary school principals and teachers apply determination of the degree to which the views of the primary institutions. The research was carried out in the scan; working population in Istanbul province, Turkey on the Asian side in the Atasehir, Kadiköy, Kartal, Maltepe and the townships of Sultanbeyli the academic year 2011-2012,…

The Questionnaire on Teacher Interaction (QTI) is a teacher--student relationship measure whose underlying two-dimensional structure is represented in a circumplex model with eight sectors. Using Smallest Space Analysis (SSA), this study examined the circumplex structure of the Chinese version of the QTI among a convenience sample of 731…

The purpose of this study was to create a new scale with a validated construct to measure professional identity development in students being prepared to become new practitioners. Using the new survey instrument (named the Professional Identity Five-Factor Scale), data were collected from a polytechnic with students enrolled in a wide range of…

Curricular implementations are unlikely to deliver the anticipated benefits for mathematics learners if written guidance to teachers is interpreted and enacted differently from the ways that policymakers and curriculum designers intend. One way in which this could happen is in relation to the mathematics tasks that teachers deploy in the…

This documentary study of academic programs at Catholic Seminaries and Theology Schools through the United States sought to answer the question: "What types of preparation does the seminary curriculum provide to new pastors about their role in the parish's Catholic School?" Results of program syllabi review show a dearth of preparation…

Background: Verbal fluency tasks are included in a broad range of aphasia assessments. It is well documented that people with aphasia (PWA) produce fewer items in these tasks. Successful performance on verbal fluency relies on the integrity of both linguistic and executive control abilities. It remains unclear if limited output in aphasia is…

The work discusses the effectiveness of the counselling treatment to enhance student academic success. The participants were randomly assigned to either an experimental group (66 students who had completed counselling treatment) or a wait-list comparison group (44 students). The Adult Self Report (ASR) by Achenbach and Rescorla [2003. "Manual…