Dyadic Curve-of-Factors Model: An Introduction and Illustration of a Model for Longitudinal Nonexchangeable Dyadic Data

The analysis of longitudinal data collected from nonexchangeable dyads presents a challenge for applied researchers for various reasons. This article introduces the dyadic curve-of-factors model (D–COFM), which extends the curve-of-factors model (COFM) proposed by McArdle (1988) for use with nonexchangeable dyadic data. The D–COFM overcomes problems with modeling composite scores across time and instead permits examination of the growth in latent constructs over time. The D–COFM also appropriately models the interdependency among nonexchangeable dyads. Different parameterizations of the D–COFM are illustrated and discussed using a real data set to aid applied researchers when analyzing dyadic longitudinal data.     

Student-Produced Action Research in Early Childhood Teacher Education

This article describes how preservice teachers accomplish and write up action research projects as part of their teacher preparation at one university in the United States. The paper is divided into four major sections. In the first section, the instructor describes how teacher research is introduced to teacher education students and how they are guided through the processes of conceptualizing, doing, and writing up their projects. The next two sections are the stories of two 1st-year teachers who describe and reflect on what they learned from completing action research projects under the direction of the instructor. The concluding section offers generalizations that synthesize lessons learned by the authors.     

In Their Own Words, Urban Students Make Suggestions for Improving the Appearance of Their Schools

In their own words, 50 students in two Los Angeles area schools reveal their feelings about litter, graffiti, and the appearance of their schools. The analysis includes a discussion of the research in environmental psychology as it pertains to overcrowding, noise and pollution, design and appearance, and their effects on productivity. Excerpts of students?? writings are included in their own words. The article concludes with solutions proposed by the students to create a clean and attractive school: more trashcans, nicely painted walls, and maintain landscaping.     

Does Homeschooling “Work”? A Critique of the Empirical Claims and Agenda of Advocacy Organizations

The phenomenal growth of homeschooling in recent years demonstrates not only the appeal of this educational approach but also the notable policy acumen of the homeschooling movement's leading advocates. This analysis examines and critiques the empirical claims made by homeschooling proponents to justify further expansion and deregulation of the movement, and sheds light on the homeschool advocacy agenda explicit in those claims. Advocates often strongly suggest a causal connection between homeschooling and academic success, postsecondary attainment, and even enjoyment of life. Seemingly, these benefits are experienced all at a reduced cost per student. It is through such claims that homeschooling advocates have expanded the practice of homeschooling and have pressed for fewer state regulations and less oversight. This article outlines and challenges those claims, showing the tenuous basis for such conclusions. Instead, in an era when policymakers demand evidence of effective educational practices, we note the remarkable lack of empirical evidence on the effectiveness of this popular approach and suggest that continued efforts to claim such evidence exists indicates the desire of advocates to further advance what is largely an ideological agenda of deregulation as an end in itself.     

A revised model of e-brand equity and its application to high technology products

Given the growing importance of online social media platforms (OSM) in brand management, the authors attempt to extend the relationship between e-brand equity and repurchase intention with two mediator variables, namely visual appeal and e-preference in which willingness to pay a price premium (WPPP) serves as a moderator. Drawing on the perspective of digitalized engagement (PDE), the authors confirm the mediating effects on the e-brand equity-repurchase intention link while evidencing both positive and negative effects of WPPP on the linkage of e-brand equity and mediators. Contributions to theory, practice, and future studies are also provided.     

Technical determinants of tackle and ruck performance in International rugby union

The most frequently occurring contact events in rugby union are the tackle and ruck. The ability repeatedly to engage and win the tackle and ruck has been associated with team success. To win the tackle and ruck, players have to perform specific techniques. These techniques have not been studied at the highest level of rugby union. Therefore, the purpose of this study was to identify technical determinants of tackle and ruck performance at the highest level of rugby union. A total of 4479 tackle and 2914 ruck events were coded for the Six Nations and Championship competitions. Relative risk ratio (RR), the ratio of the probability of an outcome occurring when a characteristic was observed (versus the non-observed characteristic), was determined using multinomial logistic regression. Executing front-on tackles reduced the likelihood of offloads and tackle breaks in both competitions (Six Nations RR 3.0 Behind tackle, 95% confidence interval [95% CI]: 1.9–4.6, effect size [ES] = large, P < 0.001); Championship RR 2.9 Jersey tackle, 95% CI: 1.3–6.4, ES = moderate, P = 0.01). Fending during contact increased the chances of offloading and breaking the tackle in both competitions (Six Nations RR 4.5 Strong, 95% CI: 2.2–9.2, ES = large, P = P < 0.001; Championship RR 5.1 Moderate, 95% CI: 3.5–7.4, ES = large, P < 0.001). For the ruck, actively placing the ball increased the probability of maintaining possession (Six Nations RR 2.2, 95% CI: 1.1–4.3, ES = moderate, P = 0.03); Championship RR 4.0, 95% CI: 1.3–11.8, ES = large, P = 0.01). The techniques identified in this study should be incorporated and emphasised during training to prepare players for competition. Furthermore, these techniques need to be added to coaching manuals for the tackle and ruck.     

Use of an audience response system during peer teaching among physical therapy students in human gross anatomy: Perceptions of peer teachers and students

An audience response system (ARS) has become popular among educators in medicine and the health professions because of the system's ability to engage listeners during a lecture presentation. No one has described the usefulness of ARS technology during planned nonlecture peer teaching sessions in gross anatomy instruction for health professionals. The unique feature of each peer teaching session was a nongraded 12–15 item ARS quiz assembled by six second‐year doctor of physical therapy (DPT) students and purposely placed at the beginning of the review session for those first‐year DPT students in attendance. This study used a ten‐item questionnaire and a five‐point Likert scale in addition to three open ended questions to survey perceptions of both first‐year and second‐year DPT students about the usefulness of ARS technology implemented during weekly interactive peer teaching sessions during a semester course in Anatomy for Physical Therapists. First‐year students overwhelmingly acknowledged the ARS system permitted each student to self‐assess his/her preparedness for a quiz or examination and compare his/her performance with that of classmates. Peer teachers recognized an ARS quiz provided them an opportunity to: (1) estimate first‐year students' level of understanding of anatomical concepts; and (2) effectively prepare first‐year students for their weekly quizzes and future examinations. On the basis of the mutual benefits derived by both students/tutees and teachers/tutors, physical therapist educators may wish to consider using ARS technology to enhance teaching methods for a class in gross human anatomy. Anat Sci Educ 2: 286–293, 2009. © 2009 American Association of Anatomists.     

Bridging professional teacher knowledge for science and literary integration via design-based research

We offer insights for using design-based research (DBR) as a model for constructing professional development that supports curriculum and instructional knowledge regarding science and literacy integration. We spotlight experiences in the DBR process from data collected from a sample of four elementary teachers. Findings from interviews, focus groups and researcher field notes elucidated: the value in establishing a collaborative foundation for professional discourse, the teacher participants developing nascent knowledge of curricular integration in science and literacy, and their apprehensions about using digital technology to support their professional development. Implications are presented for professional development facilitators and researchers using DBR as an innovative approach for teacher development.