Many experimental designs in educational and behavioral research involve at least one level of clustering. Clustering affects the precision of estimators and its impact on statistics in cross-sectional studies is well known. Clustering also occurs in longitudinal designs where students that are initially grouped may be regrouped in the following…

School accountability systems increasingly hold schools to account for their performances using value-added models purporting to measure the effects of schools on student learning. The most common approach is to fit a linear regression of student current achievement on student prior achievement, where the school effects are the school means of the…

Multivariate analysis of variance (MANOVA) is a statistical method used to examine group differences on multiple outcomes. This article reports results of a review of MANOVA in gifted education journals between 2011 and 2017 (N = 56). Findings suggest a number of conceptual and procedural misunderstandings about the nature of MANOVA and its…

Missing data are a persistent problem in psychological research. Peer nomination data present a unique missing data problem, because a nominator's nonparticipation results in missing data for other individuals in the study. This study examined the range of effects of systematic nonparticipation on the correlations between peer nomination data when…

Background: After-school programs (ASPs) have the potential to contribute to moderate-to-vigorous physical activity (MVPA), but there is limited empirical evidence to guide their development and implementation. Purpose: This study assessed the replication of an elementary school running program and identified psychological correlates of children's…

Problem Statement: The number of studies on the effect of educational leadership on several organizational outputs is increasing. The most popular topic to review within the framework of leadership is job satisfaction. In several studies, a positive correlation was found between leadership and job satisfaction. According to the two-factor theory…

The Common Core State Standards (CCSS) require a major shift in instructional practices among teachers. Such changes cause much uncertainty as teachers' roles and identities begin to change. Major school reform creates difficulty for school leaders who must develop teacher support and dedication to 'top-down' reform initiatives in their…

Research indicates the primary difference between strong and weak readers is their phonemic awareness skills. However, there is no consensus regarding which specific components of phonemic awareness contribute most robustly to reading comprehension. In this study, the relationship among sound blending, sound segmentation, and reading comprehension…

The identification of evidence-based practices continues to provoke issues of disagreement across multiple fields. One area of contention is the role of single-subject design (SSD) research in providing scientific evidence. The debate about SSD's utility centers on three issues: sample size, effect size, and serial dependence. One potential…

Using data from the 2006 Program for International Student Assessment (PISA), we explored nine aspects of science engagement (science self-efficacy, science self-concept, enjoyment of science, general interest in learning science, instrumental motivation for science, future-oriented science motivation, general value of science, personal value of…

The introduction of computer programming in K-12 has become mainstream in the last years, as countries around the world are making coding part of their curriculum. Nevertheless, there is a lack of empirical studies that investigate how learning to program at an early age affects other school subjects. In this regard, this paper compares three…

Social studies researchers across a wide geographical area assessed the degree of authentic intellectual challenge present in a diverse sample of U.S. classrooms, investigated whether students from different social and academic contexts were more likely to encounter authentic pedagogy than others, and examined how the level of authentic pedagogy…

This study sought to explore what factors contribute to transfer student success and attempted to create a model using logistic regression to help predict likeliness of transfer student success. Using a sample that included all students who transferred to Colorado State University from a regionally accredited US institution between fall 2007 and…

Finland and Shanghai are strong performers in the Program for International Student Assessment (PISA). The current study explored the similarities and differences in educational effectiveness between these 2 strong performers. To this end, 14 predictors representing student background and school process characteristics were selected from the PISA…

Purpose: The purpose of this study was to examine the efficacy of a content knowledge (CK) workshop on the enacted pedagogical content knowledge (PCK) of teachers and in turn the effects on student learning. Method: A quasiexperimental design was used to examine 4 questions: (a) How does student learning differ as a function of PCK? (b) How does…