Relative age and maturation selection biases in academy football     

Megan Hill  Sam Scott  Robert M Malina  Darragh McGee  Sean P Cumming 《Journal of sports sciences》2020,38(11-12):1359-1367

ABSTRACT

This study examined the simultaneous effects of relative age and biological maturity status upon player selection in an English professional soccer academy. A total of 202 players from the U9 to U16 age groups, over an eight-year period (total of 566 observations), had their relative age (birth quarter) and biological maturity (categorised as late, on-time or early maturing based upon the Khamis-Roche method of percentage of predicted adult height at time of observation) recorded. Players born in the first birth quarter of the year (54.8%) were over-represented across all age groups. A selection bias towards players advanced in maturity status for chronological age emerged in U12 players and increased with age; 0% of players in the U15 and U16 age group were categorised as late maturing. A clear maturity selection bias for early maturing players was, however, only apparent when the least conservative criterion for estimating maturity status was applied (53.8% early and 1.9% late maturing in the U16 age group). Professional football academies need to recognise relative age and maturation as independent constructs that exist and operate independently. Thus, separate strategies should perhaps be designed to address the respective selection biases, to better identify, retain and develop players.  相似文献   

Influences and Experiences Affecting the Pro‐environmental Behaviour of Educators     

Joy A. Palmer  Jennifer Suggate 《Environmental Education Research》1996,2(1):109-121

This paper examines the relative importance of various categories of influence and formative life experiences on the development of environmental educators’ knowledge and concern for the environment. The authors analyse the ways in which the importance of influences may change through time or be affected by the subject's age. Conclusions are drawn and discussed, including the crucial role of the family and of childhood experiences outdoors in promoting the development of concern for the environment and pro‐environmental adult behaviour.  相似文献   

Cross-cultural exchange: Teaching and learning in context     

Joy Standeven 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1988,34(1):101-109

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A Place to Protest     

Joy Jenkins  J. David Wolfgang 《Journalism Practice》2017,11(8):960-979

The national media converged on Baltimore, Charleston, and Ferguson, Missouri, in 2014 and 2015 to cover protests in response to police violence toward African American males. Although national and local media covered the events and the aftermath, alternative media sought to provide additional viewpoints and spur readers to respond. This study analyzed the practices, content, and public discourse connected to alternative weekly newspapers in Baltimore, Charleston, and St. Louis. The study examined whether the publications reflected ideal roles of alternative media, including representing different viewpoints, using non-traditional methods of content, and providing a space for the public to challenge systems of power and oppression. The authors also studied the online forums associated with all three publications, including each organization’s website and Facebook page, as potential spaces for alternative publics to emerge around a shared interest in collective action. The publications showed some characteristics of the ideal form of alternative media, but most lacked the diverse voices and critical calls to action needed to represent the normative standard. The discourse the news organizations spurred also fell short of the ideal. The forums lacked rational and critical engagement, and commenters largely failed to promote sincere attempts to engage in community conversation.  相似文献   

Levinas and Environmental Education   总被引：1，自引：0，他引：1  

Joy  Hardy 《Educational Philosophy and Theory》2002,34(4):459-476

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Inference by Eye: Pictures of Confidence Intervals and Thinking About Levels of Confidence     

Geoff Cumming 《Teaching Statistics》2007,29(3):89-93

A picture of a 95% confidence interval (CI) implicitly contains pictures of CIs of all other levels of confidence, and information about the p‐value for testing a null hypothesis. This article discusses pictures, taken from interactive software, that suggest several ways to think about the level of confidence of a CI, p‐values, and what conclusions can be drawn from inspecting a CI.  相似文献   

For-profit schools in England: the state of a nation     

Joy Martin 《教育政策杂志》2013,28(5):726-741

Abstract

Trends towards the marketisation of the schooling sector have led to suggestions that state-funded schools in England will soon be allowed to operate on a for-profit basis. This article has two aims: to contribute to understanding of the regulation and characterisation of existing for-profit schools in England; and to assess the claim that for-profit schools ‘significantly outperform’ all independent schools by exploring the use of large scale databases including the National Pupil Database (NPD). This study highlights the growth of the for-profit sector, and the scarcity of legislation detailing the financial governance, educational oversight and staffing requirements of schools in the for-profit schooling sector. The for-profit schooling sector is found to be underperforming in terms of school inspection ratings at a level of statistical significance in comparison to the state funded schooling sector. Furthermore, performance indicators relating to GCSE and A level results suggest that the for-profit sector is underperforming compared to the not-for-profit independent sector. As such, the findings of this research have implications in undermining the neoliberal argument that has driven significant change in the schooling landscape in recent times.  相似文献   

The Role of the Centre in the Professional Development of Teachers     

Joy Wells 《School Leadership & Management》2013,33(2):145-148

The study builds on earlier work which considered changes in the use of staff other than teachers (associate staff) in maintained primary and secondary schools. The focus of the study is on the introduction of staffing innovations (how they originated, how they were implemented, perceived advantages and difficulties, estimated cost effectiveness) in a new kind of educational institution – the City Technology College. The authors seek to illuminate theories of implementing change in a contemporary educational setting. The article reports on the first year's work and indicates some emergent issues.  相似文献   

Case Study of an Innovative Superintendent Succession Plan     

Joy J. Roger  L. Arthur Safer 《Clearing house (Menasha, Wis.)》2013,86(2):136-140

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The impact of support services on students’ test anxiety and/or their ability to submit assignments: a focus on vision impairment and intellectual disability     

Poulomee Datta  Joy Talukdar 《International Journal of Inclusive Education》2017,21(2):160-171

This study investigated the influence of the support services on the test anxiety of students and/or their ability to submit assignments in each of the two disability groups, those with vision impairment and those with intellectual disability, who were placed in specialist and mainstream educational settings in South Australia. Interviews were conducted with 14 students with vision impairment and 9 students with intellectual disability, as well as a total of 10 parents and 8 teachers. The findings unfolded that the support services were found to influence positively the test anxiety experienced by students with vision impairment and/or their ability to submit assignments, but appeared to help students with intellectual disability to a much smaller extent. These findings have implications for mainstream teachers and school support staff working with students with vision impairment and those with intellectual disability, to determine what type and kind of support works for these students and helps them to alleviate their test anxieties.  相似文献