Activity profile of top-class association football referees in relation to performance in selected physical tests     

Javier Mallo  José-María García-Aranda  Bart Gilis  Werner Helsen 《Journal of sports sciences》2013,31(7):805-813

Abstract

The aims of the present study were (1) to analyse the physical demands of top-class referees and (2) to compare their official FIFA fitness test results with physical performance during a match. The work rate profiles of 11 international referees were assessed during 12 competitive matches at the 2003 FIFA Under-17 World Cup and then analysed using a bi-dimensional photogrammetric video analysis system based on direct lineal transformation (DLT) algorithms. In the first 15 min of matches, the referees were more active, performing more high-intensity exercise (P < 0.01) than in the first 15 min of the second half. During the second half of matches, the referees covered a shorter distance (P < 0.01), spent more time standing still (P < 0.05), and covered less ground cruising (P < 0.05), sprinting (P < 0.05), and moving backwards (P < 0.001) than in the first half. Also in the second 45 min, the distance of referees from infringements increased (P < 0.05) in the left attacking zone of the filed. There was also a decrease (P < 0.05) in performance in the period following the most high-intensity activity, compared with the mean for the 90 min. Time spent performing high-intensity activities during a match was not related to performance in the 12-min run (r ² = 0.30; P < 0.05), the 200-m sprint (r ² = 0.05; P < 0.05), or the 50-m sprint (r ² = 0.001; P < 0.05). The results of this study show that: (1) top-class referees experienced fatigue at different stages of the match, and (2) the typical field tests used by FIFA (two 50-m and 200-m sprints, followed by a 12-min run) are not correlated with match activities.  相似文献   

Differential Effects of Three Teachers Over a Unit of Instruction     

Judith E. Rink  Peter H. Werner  Richard C. Hohn  Dianne S. Ward  Helen M. Timmermans 《Research quarterly for exercise and sport》2013,84(2):132-138

The purpose of this study was to describe the effects of three teachers on psychomotor, affective, and cognitive outcomes over a 15-lesson volleyball unit. Three intact middle school physical education classes were used. Pre- and posttests were administered for the overhead set, forearm pass, and serve psychomotor skills. A semantic differential test with four affective dimensions and a written test on the rules, strategies, and mechanics of volleyball were also administered pre- and posttest. Data on instructional characteristics were obtained using academic learning time (ALT-PE); observation system for content development (OSCD-PE), and a content analysis of lessons.

The following were key aspects of the results: (a) Teachers differed in their approaches to the content of the unit more than in the characteristics of their instruction as determined through observational data; (b) teachers differed in respect to the psychomotor skills for which they were able to produce statistically significant student gain; (c) the skill level of students played a major role in psychomotor outcomes; (d) affective measures started high and remained high from pre- to posttest with significant change occurring positively with the low-skilled in one measure; (d) cognitive learning was significant from pre- to posttest in rules and mechanics but not in strategies. Instructional characteristics, as described in this study, did not change from skill to skill, but student learning did. This led the authors to conclude that the instrumentation for instructional variables was not sensitive to differences in the way individual skills were handled by individual teachers.  相似文献   

A Multilevel CFA–MTMM Approach for Multisource Feedback Instruments: Presentation and Application of a New Statistical Model     

Jana Mahlke  Martin Schultze  Tobias Koch  Michael Eid  Regina Eckert  Felix C. Brodbeck 《Structural equation modeling》2016,23(1):91-110

Multisource feedback instruments are a widely used tool in human resource management. However, comprehensive validation studies remain scarce and there is a lack of statistical models that account appropriately for the complex data structure. Because both peers and subordinates are nested within the target but stem from different populations, the assumption of traditional multilevel structural equation models that the sample on a lower level stems from the same population is violated. We present a multilevel confirmatory factor analysis multitrait–multimethod (ML–CFA–MTMM) model that considers this peculiarity of multisource feedback instruments. The model is applied to 2 scales of the Benchmarks® instrument and it is demonstrated how measures of reliability and of convergent and discriminant validity can be obtained using multilevel structural equation modeling software. We discuss the results as well as some implications and guidelines for the use of the model.  相似文献   

Experiences of instructors in online learning environments: Identifying and regulating emotions     

Kelley Regan  Anna Evmenova  Pam Baker  Marci Kinas Jerome  Vicky Spencer  Holly Lawson  Terry Werner 《The Internet and Higher Education》2012,15(3):204-212

In an effort to expand existing research on the barriers of instructors experience in online learning environments (OLEs), a qualitative study was conducted at a large mid-Atlantic university. Six instructors teaching in different OLE formats (e.g., asynchronous, hybrid, and synchronous via videoconferencing) participated in two focus groups in order to explore their emotional experiences and ways to regulate the emotions when teaching in OLEs. The overarching themes included emotions of feeling (a) restricted, (b) stressed, (c) devalued, (d) validated, and (e) rejuvenated. The article also provides practical strategies on how participating instructors attempted to manage the challenging emotions. A consensus among all participants is that continuous dialog in a community of practice about strategies to enhance OLEs is imperative.  相似文献   

Die soziale Rolle des Athleten     

Werner Pitsch 《Sportwissenschaft》2004,34(1):117-121

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Analyzing the market of works of contemporary fine arts: An exploratory study     

Friederich Schneider  Werner W. Pommerehne 《Journal of Cultural Economics》1983,7(2):41-67

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A Market/Value Based Approach to Satisfy Stakeholders of Higher Education     

Gordon W. McClung  Mary W. Werner 《Journal of Marketing for HIGHER EDUCATION》2013,23(1):102-123

ABSTRACT

What value does the university offer in terms of economic and social development? Having stakeholders question the contribution and value of colleges and universities is not new nor is it unique to American universities. Institutions of higher education are currently facing a crisis of confidence by parents, prospective students, alumni, congressional committees, and the media. Many stakeholders are concerned about the value provided by colleges and universities. Although there has been an effort to call attention to the issue and to examine select educational processes, there is a dire need to address all aspects of the university product. This article provides a market-based paradigm to help university/college administrators understand the critical aspects of identifying, defining, managing, and delivering superior value to all stakeholders of the institution. This article also provides a university planning process model for incorporating value in the strategic planning process of any university. Faced with increasing pressure to reduce the churn rate of students and increase retention, universities' focus must shift toward attracting students who fit with the value proposition (delivery) of the institution. This article is not an attempt at resolving the debate over the role or purpose of the university; our intent is to present a market-based approach to facilitate the delivery of value to all university stakeholders in keeping with the vision and mission of the institution.  相似文献   

CONVERGENCE OF TWO INDEPENDENT ROADS LEADS TO COLLABORATION BETWEEN EDUCATION AND NEUROSCIENCE     

Kourtland R. Koch  L. Timmerman  Ann M. Peiffer  Paul J. Laurienti 《Psychology in the schools》2013,50(6):577-588

Collaboration is the foundation for innovative discoveries, as individuals with different backgrounds come together and combine their unique expertise. In the current article, an educational researcher and two neuroscientists relate their experiences in establishing a successful collaborative effort. The marriage of neuroscientific findings with educational research has begun to further advance educational approaches. Initial functional magnetic resonance imaging (fMRI) findings indicate that direct interplay between educational interventions and brain‐based measures of sensory, motor, and cognitive processes provides an important link among cognitive processing and psychometric measures. If neuroimaging results support existing theoretical constructs of brain organization, then testable hypotheses may be designed to determine which educational interventions will be effective. The neuropsychological approach may provide school psychologists and teachers with an extensive array of fMRI‐based, developmentally appropriate instructional strategies for enhancing the functional organization of the developing brain of children. Promising suggestions and strategies for educational researchers, school psychologists, and neuroscientists are included.  相似文献   

Amateur values in pageantry     

Frederick Henry Koch 《Quarterly Journal of Speech》2013,99(3):288-297

This essay argues for an enlarged conceptualization of deception. A multidimensional scaling of similarity judgments of forty‐six deception‐related terms identified a number of aspects underlying the construct. They included evaluation, detectability, and premeditation. The elicited terms were subjected to a hierarchical cluster analysis, which revealed six families of deception: fictions, playings, lies, crimes, masks, and unlies. Implications of these results were explored.  相似文献   

A Musical Proposition     

Schürer Olaf Werner 《The Educational forum》2013,77(4):457-458

Some time ago while attending a summer session at a nearby university I occupied an apartment facing an alley across from which was one of the numerous fraternity houses in the district.  相似文献