A coaches’ perspective on the contribution of anthropometry,physical performance,and motor coordination in racquet sports

ABSTRACT

Differences and similarities between table tennis and other racquet sports exist, but are not well documented in the literature, in spite of the relevance for talent identification. In this study we aimed at identifying the key characteristics of table tennis in comparison with tennis and badminton based upon a survey in coaches. A total of 177 licensed coaches from all across the world and with diverse professional backgrounds completed a survey on anthropometric measures, physical performance, and motor coordination skills. On a scale from 1 to 10, coaches indicated to what extent a talent characteristic was important for their sport. MANOVA identified key differences as well as similarities between all three racquet sports and a subsequent discriminant analysis allocated coaches correctly for table tennis, tennis, and badminton 81.01%, 55.6%, and 71.4% respectively. Our results show that table tennis and other racquet sport coaches are well aware of differences between the racquet sports and also the importance and value of testing and assortment of skill components. These findings can assist coaches in future talent orientation and transfer in racquet sports.     

Exploring the values of writing collaboratively through a digital storytelling platform: a mixed-methods analysis of users’ participation,perspectives and practices

Digital technologies allow teachers and students to experience new pedagogical approaches leveraging on interactivity and collaboration. Among the available techniques, digital storytelling (DST) has been usually regarded as an activity that can both enrich the teaching practices and foster students’ active behaviour. This paper aims at analysing to what extent a DST platform proposing the collaborative writing of a fictional story and leveraging on an active learning technique such as role-play can affect a variety of dimensions, namely students’ performance, commitment, creativity and social skills. Combining the analysis of the data-log automatically collected by the system with the evaluations given by teachers before and after the activity, this article shows that the use of a DST tool in the teaching practice can have positive effects on students, including the ones that usually manifest moderate scores for the previously mentioned dimensions. Additionally, semi-structured interviews and direct observations provide an insight on how the benefits stemming from the use of a DST tool in the classroom can especially lie on the collaborative process that is activated.     

A Determination of Velocities and Angles of Projection for the Tennis Serve

Abstract

The purpose of this study was to determine the minimum and maximum velocity of the tennis ball for selected heights of contact and angles of projection and wall impact points during the tennis serve. By use of a ballistics formula, a number of variables which determine the trajectory of the tennis ball were programed for the computer. Tables were tabulated and are available for all data gathered. Angles of projection from the horizontal were selected to range from ?5° to 15° in increments of 1°. Velocity of the serve ranged from a low of 30 ft. per second to a high of 176 ft. per second. Finally, the height of the contact point ranged from a low of 6.0 ft. to a high of 9.0 ft. in increments of .5 ft. Height of the ball when crossing the net (impact point on the practice court) ranged from a low of 3.01 ft. to a high of 8.47 ft. The minimum height at crossing was achieved at 6.5 ft. service height, a ?3° angle of projection and time from baseline of .30 sec. This is a relatively high velocity serve. In contrast, the maximum height over the net of 8.47 ft. was achieved at an 8.5 ft. service height, a 15° angle of projection, and time of .79 sec. to point of impact. These data indicate that at higher service heights and slower velocities, a ball can hit the impact area as much as 8.47 ft. from the floor, 4.47 ft. above the net and still remain in the service court.     

Predictors of primary school teachers’ knowledge about developmental dyscalculia

Developmental dyscalculia is a specific learning disability that is described as a heterogeneous and persistent cognitive disorder. Given the need to detect and intervene as early as possible to minimise its effects, teachers’ knowledge about symptoms, characteristics and effective intervention strategies in dyscalculia is essential. Given the lack of research about this topic and measures to evaluate teachers’ knowledge, this study aims to present a literature-based measure to evaluate knowledge about developmental dyscalculia and to investigate the predictors of this type of knowledge. Data were collected from a sample of 175 primary school teachers. The measure presented adequate psychometric properties. Teachers’ personal characteristics such as age and gender did not predict their knowledge about dyscalculia. Being a Special Education teacher predicted a higher knowledge of intervention strategies in dyscalculia and having heard about dyscalculia predicted higher knowledge about not only intervention strategies but also dyscalculia characteristics. The data are discussed, and suggestions for further studies are presented.     

Elementary school teachers’ preferences for school‐based interventions for students with emotional and behavioral problems

Teachers’ adoption and implementation of evidence‐based programs is often limited. Program characteristics may be important facilitators or barriers of use, yet little is known about which attributes influence teacher decisions. Using a discrete choice experiment with a sample of general education elementary teachers (N = 230), we examined (a) preference for attributes of school‐based interventions, (b) relative preference for three intervention packages with experimentally manipulated characteristics, and (c) teacher characteristics related to the above preference profiles. Intervention outcomes were the most important characteristics in teachers’ intervention decisions. Most teachers’ responses suggested preference for a social and emotional learning program (57.9%) or school‐based consultation for behavioral interventions (35.8%); a small group of teachers preferred a general support intervention (5.8%). Teachers preferring the general support intervention reported greater mental health symptoms, lower mental health literacy and lower confidence in program effectiveness than peers preferring other interventions. Implications for intervention development and future directions are discussed.     

A comparison of Australian and Chinese teachers' attributions for student problem behaviors

The present study compared Australian and Chinese teachers' causal attributions for student behavior. A total of 204 Australian teachers and 269 Chinese teachers rated the importance of four causes (ability, effort, family, teacher) of six student problem behaviors. Results showed that both groups of teachers attributed misbehaviors most to student effort and least to teacher factors. Chinese teachers emphasized family factors more while Australian teachers placed greater importance on ability. There was significant variation in attribution patterns for different types of problems, with effort attribution being equally and strongly emphasized across cultural contexts and behavior types. The results are interpreted in the light of how individualistic and collectivistic values influence teacher thinking, and implications for school‐based interventions for behavior problems are discussed.     

Teaching intelligent design or sparking interest in science? What players do with Will Wright’s Spore

The 2008 commercial video game Spore allowed more than a million players to design their own life forms. Starting from single-celled organisms players played through a caricature of natural history. Press coverage of the game??s release offer two frames for thinking about the implications of the game. Some scientists and educators saw the game as a troubling teacher of intelligent design, while others suggested it might excite public interest in science. This paper explores the extent to which these two ways of thinking about the game are consistent with what players have done with the game in its online community. This analysis suggests that, at least for the players participating in this community, the game has not seduced them into believing in intelligent design. Instead the activities of these players suggest that the game has played a catalytic role in engaging the public with science. These findings indicate that designers of educational games may wish to consider more deeply tensions between prioritizing accuracy of content in educational games over player engagement.     

Beneath the tip of the iceberg: exploring the multiple forms of university–industry linkages

This article focuses on the wide variety of channels through which the process of knowledge transfer occurs. The overall objective is to show the complexity of relationships between researchers and firms in a university system, and to identify some specific factors that influence such interactions. Our case study involves a face-to-face survey of 765 heads of research teams in a regional system to contrast the multiple forms of university?Cindustry collaborative linkages. Drawing on the exploitation of a data set developed for the purpose, we show that for a majority of universities the thrust of their collaborative experiences is devoted to tacit knowledge rather than to intellectual property rights. Researchers actively engage in the provision of different services to firms such as consulting work, commissioned or joint research projects, and human resources training. Research teams also participate in non-academic knowledge dissemination and informal networking. The results of our study enable us to draw some policy implications for university administrators and policymakers. A focus on patents and spin-offs as indicators of collaborative research ignores the limits of many of the economic and productive contexts in which universities are embedded. It may also be detrimental to the strengthening of emerging trends that are oriented towards softer collaborative experiences and other forms of knowledge transfer.