Integrating different tracking systems in football: multiple camera semi-automatic system,local position measurement and GPS technologies     

Martin Buchheit  Adam Allen  Tsz Kit Poon  Mattia Modonutti  Warren Gregson  Valter Di Salvo 《Journal of sports sciences》2014,32(20):1844-1857

Abstract

During the past decade substantial development of computer-aided tracking technology has occurred. Therefore, we aimed to provide calibration equations to allow the interchangeability of different tracking technologies used in soccer. Eighty-two highly trained soccer players (U14–U17) were monitored during training and one match. Player activity was collected simultaneously with a semi-automatic multiple-camera (Prozone), local position measurement (LPM) technology (Inmotio) and two global positioning systems (GPSports and VX). Data were analysed with respect to three different field dimensions (small, <30 m² to full-pitch, match). Variables provided by the systems were compared, and calibration equations (linear regression models) between each system were calculated for each field dimension. Most metrics differed between the 4 systems with the magnitude of the differences dependant on both pitch size and the variable of interest. Trivial-to-small between-system differences in total distance were noted. However, high-intensity running distance (>14.4 km · h^?1) was slightly-to-moderately greater when tracked with Prozone, and accelerations, small-to-very largely greater with LPM. For most of the equations, the typical error of the estimate was of a moderate magnitude. Interchangeability of the different tracking systems is possible with the provided equations, but care is required given their moderate typical error of the estimate.  相似文献   

‘A very pushy kind of folk’: Educational Reform 1944 and the Catholic Laity of England and Wales     

Kit Elliott 《History of education》2013,42(1):91-119

Throughout the first half of the twentieth century control over their schools was central to the sense of a Catholic identity for English Catholics, and its defence was a priority of their bishops. The 1944 education act threatened the financial viability of these schools. Between 1942 and 1944 the divided and uncertain response of the Catholic Hierarchy of England and Wales to the state’s proposals for educational reform opened the way for the intervention of lay catholics into the education debate. The Sword of the Spirit movement is commonly remembered as the central organization for lay initiative in Church affairs. However, for Catholics and for participants in the education debate the organization known as the Catholic Parents’ and Electors’ Association (CPEA) was far more significant. From local initiatives in Ilford, south‐east London, and Bradford, in the north, between 1940 and 1942, the CPEA expanded, until by 1944 it could claim a nationwide membership running into tens of thousands, as well as the enthusiastic support of the Catholic press. It engaged in vigorous political activity, in most cases without the sanction of clerical authority. To some extent the movement troubled Catholic authority as much as the education issue itself. With the re‐establishment of authority, following the appointment of a new cardinal‐archbishop of Westminster the movement foundered but was by no means extinguished. It embodied the extending power within the Catholic community of an urban middle class, related to, but increasingly distinct from, the growing Catholic professional elite exemplified by the growth of the Newman Association. The CPEA could be harnessed by the clerical leaders of the Catholic community, but its history indicates the social, psychological and political stresses attendant on educational change in a minority community.  相似文献   

Reading motivation,perceptions of reading instruction and reading amount: a comparison of junior and senior secondary students in Hong Kong     

Kit‐Ling Lau 《Journal of Research in Reading》2009,32(4):366-382

This study examined the relations between students' reading motivation, perceptions of reading instruction and reading amount, together with grade differences, in a Chinese educational context. A total of 1,146 students from 19 secondary schools in Hong Kong voluntarily responded to a questionnaire that measured these three sets of variables. The study's findings indicated that students' intrinsic motivation was most strongly related to their reading amount. Students' perceptions of the reading instruction they received in their Chinese language class were significantly related to their reading motivation, but were only indirectly related to their reading amount, being mediated through reading motivation. Consistent with previous studies, significant grade differences were found in all types of reading motivation, students' perceptions of reading instruction and students' reading amount. The findings indicated that junior secondary students had better self‐efficacy, intrinsic motivation, extrinsic motivation and social motivation than senior secondary students. The largest grade difference was in students' self‐efficacy. Junior secondary students also perceived the reading instruction in their Chinese language class as more mastery‐oriented and read more frequently than senior secondary students. The implications of these findings for understanding Chinese students' reading motivation and for planning effective reading instruction to enhance their motivation are discussed.  相似文献   

Connecting online learners with diverse local practices: the design of effective common reference points for conversation     

Alyssa Friend Wise  Poornima Padmanabhan  Thomas M. Duffy 《Distance Education》2009,30(3):317-338

This mixed‐methods study probed the effectiveness of three kinds of objects (video, theory, metaphor) as common reference points for conversations between online learners (student teachers). Individuals’ degree of detail‐focus was examined as a potentially interacting covariate and the outcome measure was learners’ level of tacit knowledge related to their practice (teaching). Analysis was conducted using hierarchical linear modeling and significant results were followed up with a qualitative theme analysis. An interaction between reference point type and detail‐focus was found, demonstrating a positive effect of detail‐focus within the metaphor condition. Unexpectedly, some participants interpreted the metaphors in ways other than those intended, leading to differences in the kinds of understandings developed. The study indicated that a conceptual frame is an important characteristic of a reference point that will be truly taken in common, and that metaphors need additional framing to be viable in this role. Implications for online learning conversation design are discussed.  相似文献   

Rapid‐Guessing Behavior: Its Identification,Interpretation, and Implications          下载免费PDF全文

Steven L. Wise 《Educational Measurement》2017,36(4):52-61

The rise of computer‐based testing has brought with it the capability to measure more aspects of a test event than simply the answers selected or constructed by the test taker. One behavior that has drawn much research interest is the time test takers spend responding to individual multiple‐choice items. In particular, very short response time—termed rapid guessing—has been shown to indicate disengaged test taking, regardless whether it occurs in high‐stakes or low‐stakes testing contexts. This article examines rapid‐guessing behavior—its theoretical conceptualization and underlying assumptions, methods for identifying it, misconceptions regarding its dynamics, and the contextual requirements for its proper interpretation. It is argued that because it does not reflect what a test taker knows and can do, a rapid guess to an item represents a choice by the test taker to momentarily opt out of being measured. As a result, rapid guessing tends to negatively distort scores and thereby diminish validity. Therefore, because rapid guesses do not contribute to measurement, it makes little sense to include them in scoring.  相似文献   

A school-based phonological awareness intervention for struggling readers in early French immersion     

Nancy Wise  Nadia D’Angelo  Xi Chen 《Reading and writing》2016,29(2):183-205

The current intervention study investigated the sustained effectiveness of phonological awareness training on the reading development of 16 children in French immersion who were identified as at-risk readers based on grade 1 English measures. The intervention program provided children from three cohorts with supplemental reading in small groups on a withdrawal basis. Children in the experimental group (n = 5) received English phonological awareness training in combination with letter-sound correspondence instruction twice per week for 18 consecutive weeks, while those in the control condition (n = 7) engaged in English vocabulary-building activities. Significant gains were made after the training and maintained for 2 years on both French phonological awareness and French word reading skills for the experimental group. Results suggest that a phonologically based intervention in English can effectively address phonological awareness deficits and facilitate reading acquisition for French immersion children who may be at-risk for later reading difficulties.  相似文献   

Examination Result Attribution,Expectancy and Achievement Goals among Chinese Students in Hong Kong∗     

Kit‐Tai Hau  Farideh Salili 《Educational studies》1990,16(1):17-31

The structure of Chinese primary school students’ causal attributions for actual examination results was examined. A factor analysis of the attributions revealed dimensions which supported Weiner's classification. Age‐related differences as well as interrelationships among perceived attainment, expectancy of success, causal attributions and achievement goals were also explored. Results showed that older students had lower but more accurate perceived attainment than younger students. They also attributed more to internal causes and study at home, and they had stronger learning goals. Results also showed that leaming‐oriented students attributed more to internal causes and study at home but less to home conditions, while performance‐oriented students attributed more to uncontrollable causes. Results were explained and discussed with reference to the socialisation patterns in the Chinese culture.

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The Effect of Teachers’ Evaluative Feedback on Chinese Students’ Perception of Ability: a cultural and situational analysis     

Farideh Salili  Kit‐Tai Hau 《Educational studies》1994,20(2):223-236

The research explored the effect of teachers’ evaluative feedback on students’ perception of ability. The subjects were 758 Chinese students from elementary schools, high schools, and a university in Hong Kong. Subjects rated ability and effort of two hypothetical students who achieved identical results (success or failure) in a mathematics test but received different feedback (praise, blame, or neutral feedback) from the teacher. They also rated the teacher's perception of their own and their friends’ ability and effort in a similar situation after a real mathematics test. The results of this study support previous findings which indicate that ability perception is influenced by cultural and contextual variables. Contrary to the findings with Western students, ability and effort were positively correlated. The importance of effort among the Chinese students appears to mitigate the effects of teachers’ feedback on students’ ability. Age‐related differences were also observed. The results are discussed in terms of sociocultural background of the subjects.  相似文献   

Provoking Points of Convergence: Museum and University Collaborating and Co‐evolving     

Nadine Kalin  Kit Grauer  Jill Baird  Cheryl Meszaros 《The International Journal of Art & Design Education》2007,26(2):199-205

This article outlines art education courses undertaken in museum and gallery contexts as a component of the Certificate Programme in Visual and Material Culture within the University of British Columbia's Department of Curriculum Studies. With the creation of this programme and through the forging of relationships with area museums, unique ways have evolved for graduate students from diverse areas of education and art teacher education candidates to interact with works of art, museum professionals, artists, and the museum space itself. The purpose of these courses is to use museum and gallery settings as sites to test ideas, critique educational programmes, and advance new approaches for teachers to use museums in more creative and integrated ways in their teaching while expanding theoretical knowledge and interpretive repertoires. Through participating in this collaborative venture we have learned that when you invite teachers into museums, make efforts to increase their comfort within these spaces, while recognising what interpretive insights they offer as active participants in museum discourses, points of convergence between teachers, universities, and museums are formed.  相似文献   

Are physical activity and academic performance compatible? Academic achievement,conduct, physical activity and self‐esteem of Hong Kong Chinese primary school children     

C. C. W. Yu  Scarlet Chan  Frances Cheng  Kit‐Tai Hau 《Educational studies》2006,32(4):331-341

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