Contextual influences and athlete attitudes to drugs in sport

This article reports on 11 narrative-based case histories which sought to: (1) uncover the attitudes of players and athletes to drugs in sport, and (2) explore contextual factors influencing the formation of those attitudes as informed by social ecology theory. Overall, participants viewed the use of banned performance-enhancing substances as cheating, ‘hard’ non-performance-enhancing recreational or illicit substances as unwise, legal non-performance-enhancing substances as acceptable, and legal performance-enhancing substances as essential. In short, attitudes were sometimes quite libertarian, and contingent upon first, the legality of the substance, and second, its performance impact. Results also indicated that athletes’ attitudes about drugs were fundamentally shaped by sport's culture. Other significant factors included its commercial scale, closely identifiable others, early experiences and critical incidents of players and athletes, and their level of performance.     

Digital Module 06: Bayesian Psychometrics—Posterior Predictive Model Checking https://ncme.elevate.commpartners.com

Drawing valid inferences from modern measurement models is contingent upon a good fit of the data to the model. Violations of model‐data fit have numerous consequences, limiting the usefulness and applicability of the model. As Bayesian estimation is becoming more common, understanding the Bayesian approaches for evaluating model‐data fit models is critical. In this instructional module, Allison Ames and Aaron Myers provide an overview of Posterior Predictive Model Checking (PPMC), the most common Bayesian model‐data fit approach. Specifically, they review the conceptual foundation of Bayesian inference as well as PPMC and walk through the computational steps of PPMC using real‐life data examples from simple linear regression and item response theory analysis. They provide guidance for how to interpret PPMC results and discuss how to implement PPMC for other model(s) and data. The digital module contains sample data, SAS code, diagnostic quiz questions, data‐based activities, curated resources, and a glossary.     

A microfluidic membrane device to mimic critical components of the vascular microenvironment

Vascular function, homeostasis, and pathological development are regulated by the endothelial cells that line blood vessels. Endothelial function is influenced by the integrated effects of multiple factors, including hemodynamic conditions, soluble and insoluble biochemical signals, and interactions with other cell types. Here, we present a membrane microfluidic device that recapitulates key components of the vascular microenvironment, including hemodynamic shear stress, circulating cytokines, extracellular matrix proteins, and multiple interacting cells. The utility of the device was demonstrated by measuring monocyte adhesion to and transmigration through a porcine aortic endothelial cell monolayer. Endothelial cells grown in the membrane microchannels and subjected to 20 dynes∕cm(2) shear stress remained viable, attached, and confluent for several days. Consistent with the data from macroscale systems, 25 ng∕ml tumor necrosis factor (TNF)-α significantly increased RAW264.7 monocyte adhesion. Preconditioning endothelial cells for 24 h under static or 20 dynes∕cm(2) shear stress conditions did not influence TNF-α-induced monocyte attachment. In contrast, simultaneous application of TNF-α and 20 dynes∕cm(2) shear stress caused increased monocyte adhesion compared with endothelial cells treated with TNF-α under static conditions. THP-1 monocytic cells migrated across an activated endothelium, with increased diapedesis in response to monocyte chemoattractant protein (MCP)-1 in the lower channel of the device. This microfluidic platform can be used to study complex cell-matrix and cell-cell interactions in environments that mimic those in native and tissue engineered blood vessels, and offers the potential for parallelization and increased throughput over conventional macroscale systems.     

The impact of science content and professional learning communities on science teaching efficacy and standards‐based instruction

This study examines the impact of standards‐based professional development on teacher efficacy and instructional practice of elementary and middle school science teachers. Professional development activities were conducted over a period of 3 years and included content courses as well as teacher involvement in professional learning communities. Teacher efficacy was assessed at five time points using the Science Teacher Efficacy Beliefs Instrument (STEBI), and instructional practice was evaluated at four time points with classroom observations using the Reformed Teaching Observation Protocol (RTOP). Results indicate that there was significant growth in teacher self‐efficacy but not in outcome expectancy. There was also significant growth in the extent to which teachers implemented inquiry‐based instruction in the classroom. Additionally, a positive correlation was observed between changes in self‐efficacy and changes in the use of inquiry‐based instructional practice. These results are discussed in terms of a model of teacher learning wherein changes in teacher beliefs and changes in classroom practice mutually influence each other, and also in terms of the impact of collaboration on teacher efficacy and practice. © 2010 Wiley Periodicals, Inc., Inc. J Res Sci Teach 48: 534–551, 2011     

Exploring the underlying factor structure of the home literacy environment (HLE) in the English and Spanish versions of the Familia Inventory: A cautionary tale

Few research-based measures of the family literacy environment are commercially available, especially in Spanish. One exception is the Familia Inventory (Taylor, 1995). The present study investigated the 10 subscales of this instrument and the factor structure they imply, using data from a low-socioeconomic (SES), largely Hispanic population. Confirmatory factor analysis (CFA) was used to test the structure of the instrument as well as whether it is invariant across English and Spanish language versions. The scale was administered to 232 parents of preschoolers. Results of the CFA revealed that the a priori dimensions of the Familia Inventory were not supported for this sample. Follow-up analyses suggested poor fit both within and between subscales. The scale fit poorly within both English and Spanish, precluding testing of invariance across language. Supplemental analyses using exploratory factor analysis (EFA) on a subset of the items that had adequate variance suggested that a four-factor solution accounting for 53% of the variance best represented the English data and that a two-factor solution accounting for 43% of the variance best represented the Spanish data. Implications are discussed.     

Imagining a transformed UNESCO with learning at its core

This paper argues that key aspects of UNESCO's organizational culture are a major impediment to the realization of its important educational agenda. Drawing upon sustained observations over a four-year period, the paper describes the nature and consequences of UNESCO's highly ritualized and ‘inward-oriented’ work activities, especially the weak links between what happens at Headquarters and the realities on the ground in formal and non-formal educational frameworks worldwide. By establishing a more open, interactive and egalitarian organizational milieu, focused on collaborative learning and knowledge creation, accumulation and dissemination, this paper argues that these linkages can be tightened. A genuine learning-oriented culture at UNESCO would encourage professional empowerment, independent thinking, human resource development, greater dialogue and critical debate, and the creation and dissemination of quality publications. Thus, for UNESCO to regain its leadership role in the education world and effectively serve as a broker of innovative ideas and effective programs, it must overcome the stultifying tendencies of its current organizational culture and find ways to develop dynamic learning cultures both from without and from within.     

An evaluation of Early Reading First (ERF) preschool enrichment on language and literacy skills

Early Reading First (ERF) was created to address problems related to language and development among economically disadvantaged and language-minority preschool children through quality classroom processes, professional development, and instruction. More than any previous initiative, ERF specifies what early literacy instruction should look like in preschool classrooms; however, to date, scant research has examined the effectiveness of the program. In this quasi-experimental study, the effectiveness of ERF preschool enrichment was evaluated through comparison with the performance of demographically similar children from the same school district who received practice-as-usual instruction. As in previous research, ERF-enriched instruction was found to enhance acquisition of alphabet knowledge and print concepts. Unlike previous studies, however, it was also found to promote vocabulary development. Multilevel models were chosen to take into account the non-independence of students in the same classroom in testing the effects of ERF.     

Verbal Final Exam in Introductory Biology Yields Gains in Student Content Knowledge and Longitudinal Performance

We studied gains in student learning over eight semesters in which an introductory biology course curriculum was changed to include optional verbal final exams (VFs). Students could opt to demonstrate their mastery of course material via structured oral exams with the professor. In a quantitative assessment of cell biology content knowledge, students who passed the VF outscored their peers on the medical assessment test (MAT), an exam built with 40 Medical College Admissions Test (MCAT) questions (66.4% [n = 160] and 62% [n = 285], respectively; p < 0.001);. The higher-achieving students performed better on MCAT questions in all topic categories tested; the greatest gain occurred on the topic of cellular respiration. Because the VF focused on a conceptually parallel topic, photosynthesis, there may have been authentic knowledge transfer. In longitudinal tracking studies, passing the VF also correlated with higher performance in a range of upper-level science courses, with greatest significance in physiology, biochemistry, and organic chemistry. Participation had a wide range but not equal representation in academic standing, gender, and ethnicity. Yet students nearly unanimously (92%) valued the option. Our findings suggest oral exams at the introductory level may allow instructors to assess and aid students striving to achieve higher-level learning.     

The Read/Write Web and the Future of Library Research

ABSTRACT

The new, social Web is fun and easy to use. The same cannot usually be said of library Web sites and digital resources. Libraries would benefit from incorporating aspects of the Read/Write Web into their services. This article examines how libraries currently erect barriers to service and provides an example of how these barriers could be eliminated by the creation of a social library research environment.     

Communcating emotional support and its relationship to feelings of being understood,trust, and self‐disclosure

The communicating of emotional support would seem to be an aspect of any successful relationship. Additionally, it would seem to reason that how one communicates emotional support would be an aspect of a relationship pertinent to communication research. Unfortunately, there is very little empirical evidence that illuminates how this is related to other relational outcomes such as trust. Weber and Patterson (1996) first developed a measure that taps into how much emotional support one receives from a specific other. In their initial scale development piece the authors validate the Communication Based Emotional Support Scale (CBESS) by finding positive correlations with both relationship solidarity and relationship satisfaction. This current study aimed to further validate the CBESS by exploring its relationship to trust, self‐disclosure, and feelings of being understood.