Testing Leader–Member Exchange Theory as a Lens to Understand Students’ Classroom Justice Perceptions and Antisocial Communication

The purpose of this study was to test whether leader–member exchange theory (LMX) offers an explanatory lens for the program of classroom justice research. To that end, relationships among justice, LMX, and antisocial communication were explored. Findings indicated that perceptions of justice and LMX were positively related. Likewise, perceptions of interactional and procedural justice negatively predicted indirect interpersonal aggression, hostility, and revenge. Similarly, LMX perceptions were negatively related to students’ hostility and revenge and mediated the relationships between students’ perceptions of distributive justice and these outcomes. LMX also moderated the relationships between students’ perceptions of classroom justice and indirect interpersonal aggression and deception. Implications, limitations, and future research are discussed.     

电子评价研究新进展

近年来在教育技术学领域,对教育系统如何产生公平、有吸引力评价感兴趣的人,越来越清晰地认识到我们需要认真思考评价。如果我们希望创造对世界发展做出贡献的教育系统,那么我们需要思考如何通过改变评价实践来实现这个目标。本文对评价在塑造教育实践中的核心角色进行了论述,并指出了改变我们世界所面临的机遇和挑战。     

Cascade optical chromatography for sample fractionation

Optical chromatography involves the elegant combination of opposing optical and fluid drag forces on colloidal samples within microfluidic environments to both measure analytical differences and fractionate injected samples. Particles that encounter the focused laser beam are trapped axially along the beam and are pushed upstream from the laser focal point to rest at a point where the optical and fluid forces on the particle balance. In our recent devices particles are pushed into a region of lower microfluidic flow, where they can be retained and fractionated. Because optical and fluid forces on a particle are sensitive to differences in the physical and chemical properties of a sample, separations are possible. An optical chromatography beam focused to completely fill a fluid channel is operated as an optically tunable filter for the separation of inorganic, polymeric, and biological particle samples. We demonstrate this technique coupled with an advanced microfluidic platform and show how it can be used as an effective method to fractionate particles from an injected multicomponent sample. Our advanced three-stage microfluidic design accommodates three lasers simultaneously to effectively create a sequential cascade optical chromatographic separation system.     

A Short Run: Australian Sports History on the 40th Anniversary of the Biennial Sporting Traditions Conference

Abstract

The 40th anniversary of the biennial Sporting Traditions Conference provides a timely opportunity to examine the health of sports history in Australia. This paper identifies three methods through which we can take the temperature of the field and judge its wellbeing. Usually neglected, the first approach is to explore the teaching of sports history in Australia. The second is an analysis of the individuals who have presented to the 21 Sporting Traditions conferences held since 1977 and the content of their papers. The third method is to consider the impact of research in Australian sports history through citations and the other methods used by the Commonwealth of Australia to judge research quality. All three methods support the conclusion that after 40 years sports history’s future in Australia remains far from secure.     

Between-Day Reliability and Usefulness of a Fitness Testing Battery in Youth Sport Athletes: Reference Data for Practitioners

This study aimed to evaluate the between-day reliability and usefulness of a fitness testing battery in a group of youth sport athletes. Fifty-nine youth sport athletes (age = 17.3 ± 0.7 years) undertook a fitness testing battery including the isometric mid-thigh pull, counter-movement jump, 5–40 m sprint splits, and the 5–0-5 change of direction test on two occasions separated by 7 days. Usefulness was assessed by comparing the reliability (typical error) to the smallest worthwhile change. The typical error was 5.5% for isometric mid-thigh pull and 3.8% for counter-movement jump. The typical error values were 2.7, 2.5, 2.2, 2.2, and 1.8% for the 5, 10, 20, 30, and 40 m sprint splits, and 4.1% (left) and 5.4% (right) for the 5–0-5 tests. The smallest worthwhile change ranged from 1.1 to 6.1%. All tests were identified as having “good” or “acceptable” reliability. The isometric mid-thigh pull and counter-movement jump had “good” usefulness, all other tests had “marginal” usefulness.     

What resources do parents exchange in the VCLL?

Abstract

When parent relationships form within the context of a youth baseball league, they can and often do facilitate the exchange of benefits to one or more parties, a phenomenon known as social capital. Based on 18 months of fieldwork, approximately 30 interviews, and innumerable casual conversations with parents and league officials, I explore the specific types of resources that were typically shared between parents of a youth baseball league in the American Southwest. I uncovered four specific types of benefits that parents offered and accepted as a result of the relationships they cultivated during baseball seasons: emotional support, information sharing regarding goods and services about town, job information sharing, and childcare.     

Kinematic analyses of seated throwing activities with and without an assistive pole

In Paralympic seated throwing events, the athlete can throw with and without an assistive pole. This study aimed to identify and compare performance-related kinematic variables associated with both seated throwing techniques. Twenty-nine non-disabled males (21.9 ± 2.6 years) performed 12 maximal throws using a 1-kg ball in two conditions (no-pole and pole). Automatic 3D-kinematic tracking (150 Hz) and temporal data were acquired. There was no significant difference between ball speeds at the point of release between conditions (no-pole = 12.8 ± 1.6 m/s vs. pole = 12.9 ± 1.5 m/s). There were four kinematic variables that were strongly correlated with ball speed when throwing with or without an assistive pole. These variables were elbow flexion at the start phase (pole r = .39 and no-pole r = .41), maximum shoulder external rotation angular velocity during the arm cocking phase (pole r = .42), maximum shoulder internal rotation angular velocity during the arm acceleration phase (pole r = .47), and should internal rotation angular velocity at the instant of ball release (pole r = .40). The pole clearly influenced the throwing technique with all four strongly correlated variables identified in this condition, compared to only one during the no-pole condition. When using the pole, participants produced significantly higher shoulder internal rotation angular velocities during the arm acceleration phase (pole = 367 ± 183°/s vs. no-pole = 275 ± 178°/s, p < .05) and at the instant of ball release (pole = 355 ± 115°/s vs. no-pole = 264 ± 120°/s, p < .05), compared to throwing without the pole. These findings have implications for the development of evidence-based classification systems in Paralympic seated throwing, and facilitate research that investigates the impact of impairment on seated throwing performance.     

Towards a critical sport heritage: implications for sport tourism

ABSTRACT

This paper reflects upon the development and increased acceptance for heritage becoming a key component of sport tourism research. The original sport heritage typology, as posited by Ramshaw and Gammon [2005, More than just Nostalgia? Exploring the heritage/sport tourism nexus. Journal of Sport & Tourism, 10(4), 229–241], is re-examined through a more critical lens, revealing additional dimensions that help augment its key components. More specifically, it is argued that future studies should consider the more intangible features of sport heritage, as well as acknowledging the expanding global nature of sport and its impact upon fandom. Also, the case is made for research to explore the dissonance inherent in much of sports heritage, as well as determining where the power lies in allocating and championing current sport heritages. Lastly, the more general implications to the field of sport tourism are offered with particular regard to motivation, place, and consumption.