Tennis serve performances at break points: Approaching practice patterns for coaching

Tennis comprises specific match situations when winning the next point is crucial. These big points can decide about a win or loss and, thus, reasonably arouse mental stress. Break points (BPs) are considered as big points and the outcome is influenced by, among a variety of other factors, the serve, which is well accepted being one of the dominant strokes in Men’s tennis. In this study, we examined the serve behaviour for male players in the Wimbledon tournament 2016 to investigate the possible impacts of presumed mental stress within the situation of BPs, and further, if winning players perform better than losing players. A total of 28.843 points were analysed and divided into BP (n?=?2.035) and non-break points – referred to as regular points (RP; n?=?26.808).     

Der Einfluss von aufmerksamkeitslenkenden Instruktionen auf das Erlernen einer Schlagbewegung im Golf

Among other things instructions serve the purpose of directing the recipient’s attentional focus. Several studies have demonstrated the advantage of an attentional focus away from one’s body (external) and towards the effect of the movement over an attentional focus on the movement itself (internal). In contrast, other studies have shown that the advantage of an external focus cannot be generalized. The present study utilized a golf putting task to investigate the effectiveness of an internal versus an external focus. Furthermore, the present study investigated whether participants complied with the instructions with the respective focus during the learning phase. Moreover, in addition to the performance on the putting task the movement execution was also examined. The results showed that the internal as well as the external group switched between the internal and external focus and additionally modified a neutral focus. There was no correlation between hitting performance and movement variability, but a correlation between the neutral focus and the movement variability was found. The results challenge empirical analysis and the results of research about attentional focus.     

‘Efficiency’ and ‘Vocationalism’ as Structuring Principles of Industrial Education in the USA

The aim of this paper, based on a comparative viewpoint from an European outsider perspective, is to present a brief historical reconstruction of the pedagogical and educational political discussion about education for the industrial sector in America. The discussion was triggered by the emerging idea that one of the principal tasks of education should be to prepare youth most effectively for their upcoming work life. It followed that the constitution and role of the American schools to achieve this purpose were widely debated early in the twentieth century by eminent pedagogues. Some of these pedagogues argued for an American education system that also developed vocational abilities and skills, whereas others favoured only the development of general knowledge. During the course of this dispute, across the first half of the twentieth century, other key issues were brought forward such as whether this much vaunted vocational education should be enacted in comprehensive schools or whether other kinds of schools should be established for these purposes. Furthermore, another model that resembled the German vocational system was also proposed through this period. However, ultimately and unlike in Germany, a dual model of vocational education and training characterised by an interlocking of school-based instruction and workplace training has not managed to establish itself as a discrete educational sector in America. Currently, education for industry is provided mainly in schools and tends to be oriented towards the criteria of efficiency and vocationalism.

The impact of system specifics on systems thinking

Present and future social and ecological challenges are complex both to understand and to attempt to solve. To comprehend the complex systems underlying these issues, students need systems thinking skills. However, in science education, a uniform delineation of systems thinking across contexts has yet to be established. While there seems to be consensus on a number of key skills from a theoretical perspective, it remains uncertain whether it is possible to distinguish levels of systems thinking, and if so, how they would be determined. In this study, we investigated the impact of the specifics of a system on the skills and levels of systems thinking. We administered a 36-item multiple-choice test to 196 Grade 5 and 6 students. For our analysis, we followed a quantitative approach, applying a systems thinking model that incorporates the latest insights on the levels and skills of systems thinking in geography to the context of ecology. By following an Item Response Theory approach, we confirmed a set of systems thinking skills that are necessary to understand complex systems in ecology: identifying system organization, analyzing system behavior, and system modeling. We examined whether individual skill levels can be distinguished to determine whether a system's general principle or system-specific features cause difficulty for students. Our results indicate that system specifics, such as type of relation within ecosystems (e.g., predator–prey), appear to determine the formation of levels. Students struggled most with the difference between basic, direct cause-and-effect relationships and indirect effects. Once they understood the relevance of indirect relationships in moderately complex systems, a further increase in complexity caused little additional difficulty. Accordingly, we suggest that systems thinking should be examined from a variety of perspectives. To promote interdisciplinary learning, a systems thinking model that defines key commonalities across fields while leaving space for system specifics is needed.     

Ubiquitous computing in sports: A review and analysis

Abstract

Ubiquitous (pervasive) computing is a term for a synergetic use of sensing, communication and computing. Pervasive use of computing has seen a rapid increase in the current decade. This development has propagated in applied sport science and everyday life.

The work presents a survey of recent developments in sport and leisure with emphasis on technology and computational techniques. A detailed analysis on new technological developments is performed. Sensors for position and motion detection, and such for equipment and physiological monitoring are discussed. Aspects of novel trends in communication technologies and data processing are outlined.

Computational advancements have started a new trend – development of smart and intelligent systems for a wide range of applications – from model-based posture recognition to context awareness algorithms for nutrition monitoring. Examples particular to coaching and training are discussed. Selected tools for monitoring rules' compliance and automatic decision-making are outlined. Finally, applications in leisure and entertainment are presented, from systems supporting physical activity to systems providing motivation.

It is concluded that the emphasis in future will shift from technologies to intelligent systems that allow for enhanced social interaction as efforts need to be made to improve user-friendliness and standardisation of measurement and transmission protocols.     

User wayfinding strategies in public library facilities

An experiment in a public library demonstrates that Passini's conceptual framework of wayfinding can be applied to public library patron wayfinding behavior. Participants were asked to think aloud while completing prescribed wayfinding tasks. Findings indicate that library patrons use all five of Passini's strategies to varying degrees, supporting the need for further research testing this framework with library patrons. Participants were given varying level of details on Passini's strategies prior to completing the wayfinding tasks, and that intervention had no significant effect on the results.     

Doing it for them: corporatism and apprentice activism in Switzerland, 1880–1950

In the history of vocational education and training, apprentices seldom feature as actors. They are also rarely mentioned among those affected by economic conditions and political measures. Studies of England and Scotland have shown that, over a period of decades, there was a widespread apprentice movement during the twentieth century. So far, studies of German-speaking areas have barely registered this and have solely concentrated on apprentice protests in the 1960s and 1970s. The present article addresses this desideratum, investigating the form and content of how apprentices articulated their interests in Switzerland between 1880 and 1950. The main reason why Switzerland never experienced major sustained apprentice protests was because of its corporatist organisation of vocational education policy. This policy meant that there was no space available for independent forms of protest as charitable organisations, industrial and occupational associations, trade unions and state agencies assumed the task of articulating the interests of apprentices.