Reform efforts in statistics education emphasize the need for students to develop statistical thinking. Critical to this goal is a solid understanding of design in the process of collecting data, evaluating evidence, and drawing conclusions. We collected survey responses from over 700 college students at the start of an introductory statistics…

This paper comprises the results of a design study that aims at developing a theoretically and empirically based learning trajectory on statistical inference for 9th-grade students. Based on theories of informal statistical inference, an 8-step learning trajectory was designed. The trajectory consisted of two similar four step sequences: (1)…

Research into peer interaction continues to grow and new findings with new designs have been reported. However, there remain theoretical and methodological issues that replication studies can address. In this article, I first discuss theoretical frameworks that have been used to investigate peer interaction, namely, interactionist, sociocultural,…

It is not always clear how to adjust for control data in causal inference, balancing the goals of reducing bias and variance. We show how, in a setting with repeated experiments, Bayesian hierarchical modeling yields an adaptive procedure that uses the data to determine how much adjustment to perform. The result is a novel analysis with increased…

The nonequivalent groups with anchor test (NEAT) design is widely used in test equating. Under this design, two groups of examinees are administered different test forms with each test form containing a subset of common items. Because test takers from different groups are assigned only one test form, missing score data emerge by design rendering…

Children's low academic skills are associated with a variety of behavior problems and maladaptive outcomes throughout childhood and adulthood. Given the prevalence of behavioral disorders is approximately 19% of all US children, understanding of the mechanisms through which academic achievement and externalizing behavior problems interact can…

Wellness behaviors enacted during the college years may have long-term impacts on adult health; as such, it is critical that college students be educated regarding health behaviors and ways to improve their wellness. One way to educate students in reference to improved health practices is through college/university instructional physical activity…

The purpose of this study was to examine the predictability of types of mentoring relationships on the perceived academic success, retention status, graduation status, and progression status of undergraduate students in the United States. Specifically, this study focused on the predictable relationship between types of mentoring relationships such…

This work describes a single-session laboratory experiment devoted to teaching the principles of factorial experimental design. Students undertook the rational optimization of a luminol oxidation reaction, using a two-level experiment that aimed to create a long-lasting bright emission. During the session students used only simple glassware and…

The purpose of this empirical investigation was to determine the predictable relationship between body type factors, socio-demographic factors, attitudes toward body factors, and the self-esteem scores of undergraduate college students. More specifically, the study was concerned with the predictability of body types, socio-demographics, and…

User involvement in social care research has generally been the preserve of qualitative methodologies, while user involvement in quantitative research has tended to be limited by the assumed inflexibility of statistical designs and concerns that lay people may require specialist training to engage with quantitative methods. Using the example of…

Understanding the abstract principles of statistical experimental design can challenge undergraduate students, especially when learned in a lecture setting. This article presents a concrete and easily replicated example of experimental design principles in action through a hands-on learning activity for students enrolled in an experimental design…

The purpose of this quantitative study was to understand the perceived impact of Illinois' "Performance Evaluation Reform Act" (PERA) on principal evaluation, principal leadership practice, and principal professional development through surveying Illinois' public school principals and principal evaluators. This study used quantitative…

Northwest Evaluation Association™ (NWEA™) conducts norming studies every several years to provide the best and most up-to-date information we can about student achievement and growth to better support educational decision-making. It is an important part of our commitment to our partners. The most recent NWEA norms were released in July 2015. Just…

Professional collaboration among teachers from different schools is generally recognised as a conduit for teachers to improve their practice. This paper presents findings from a study to investigate the impact of teachers' participation in a mathematics networked learning community (NLC) on classroom practices. Using a pretest-posttest…