Teacher attrition: a review of literature   总被引：1，自引：0，他引：1  

Doune Macdonald   《Teaching and Teacher Education》1999,15(8):1029

Teacher attrition is generally positioned within research addressing teacher shortage, the wastage of resources and expertise, as well as that concerning teachers’ lowly status and poor working conditions. As such the research is fragmented and diverse. This paper attempts to draw together contemporary international attrition research in order to consider: how teacher attrition may be defined; patterns of attrition; influences upon attrition; the impact of attrition; and strategies employed for decreasing attrition. It concludes that research concerning teacher attrition requires the development of more comprehensive databases on teaching personnel and increased clarity of how attrition is being framed and investigated.  相似文献   

When "where" is more important than "when": birthplace and birthdate effects on the achievement of sporting expertise   总被引：3，自引：2，他引：1  

Côté J  Macdonald DJ  Baker J  Abernethy B 《Journal of sports sciences》2006,24(10):1065-1073

In this study, we assessed whether contextual factors related to where or when an athlete is born influence their likelihood of playing professional sport. The birthplace and birth month of all American players in the National Hockey League, National Basketball Association, Major League Baseball, and Professional Golfer's Association, and all Canadian players in the National Hockey League were collected from official websites. Monte Carlo simulations were used to verify if the birthplace of these professional athletes deviated in any systematic way from the official census population distribution, and chi-square analyses were conducted to determine whether the players' birth months were evenly distributed throughout the year. Results showed a birthplace bias towards smaller cities, with professional athletes being over-represented in cities of less than 500,000 and under-represented in cities of 500,000 and over. A birth month/relative age effect (in the form of a distinct bias towards elite athletes being relatively older than their peers) was found for hockey and baseball but not for basketball and golf. Comparative analyses suggested that contextual factors associated with place of birth contribute more influentially to the achievement of an elite level of sport performance than does relative age and that these factors are essentially independent in their influences on expertise development.  相似文献   

On the role of novelty for search result diversification     

Rodrygo L. T. Santos  Craig Macdonald  Iadh Ounis 《Information Retrieval》2012,15(5):478-502

Re-ranking the search results in order to promote novel ones has traditionally been regarded as an intuitive diversification strategy. In this paper, we challenge this common intuition and thoroughly investigate the actual role of novelty for search result diversification, based upon the framework provided by the diversity task of the TREC 2009 and 2010 Web tracks. Our results show that existing diversification approaches based solely on novelty cannot consistently improve over a standard, non-diversified baseline ranking. Moreover, when deployed as an additional component by the current state-of-the-art diversification approaches, our results show that novelty does not bring significant improvements, while adding considerable efficiency overheads. Finally, through a comprehensive analysis with simulated rankings of various quality, we demonstrate that, although inherently limited by the performance of the initial ranking, novelty plays a role at breaking the tie between similarly diverse results.  相似文献   

Private Lives,Public Lives: Surveillance,Identity and Self in the Work of Beginning Physical Education Teachers     

Doune Macdonald  David Kirk 《Sport, Education and Society》2013,18(1):59-75

ABSTRACT

This paper contributes to knowledge of teacher socialization, and in particular, current understandings of sources of teacher dissatisfaction. It focuses on the experiences of beginning physical education teachers working in non‐metropolitan schools. While lining and working in small conservative communities, these teachers were subject to a variety of pressures relating to their isolation, beginning professional status, and personal lifestyle choices. These pressures to conform are explored using Foucault's [FOUCAULT, M. (1977) Discipline and Punish (New York, Pantheon] account of the processes of regulation and surveillance, and by drawing on data which illustrates how teachers’ work practices, appearance and lifestyles were being watched by the school and outside community.  相似文献   

The influence of golf shaft torque on clubhead kinematics and ball flight     

Sasho James Mackenzie  Erik Matthew Henrikson  Heidi Lynette Macdonald  Troy William Hillier 《Journal of sports sciences》2013,31(24):2849-2855

ABSTRACT

The purpose of this study was to investigate the influence of shaft torque (torsional rigidity) on clubhead kinematics and the resulting flight of the ball. Two driver shafts with disparate levels of torque, but otherwise very similar properties, were tested by 40 right-handed golfers representing a range of abilities. Shaft deflection data as well as grip and clubhead kinematics were collected from 14 swings, with each shaft, for each golfer using an optical motion capture system. Ball flight and additional clubhead kinematics were collected using a Doppler radar launch monitor. At impact, the high torque shaft (HT) was associated with increased delivered loft (P = .028) and a more open face (P < .001) relative to the low torque shaft (LT). This resulted in the HT shaft being associated with a ball finishing position that was further right (P = .002). At the individual level, the change in face angle due solely to shaft deformation was significantly higher for the HT shaft for 25/40 participants. Although shaft twist was not directly measured, it was logically deduced using the collected data that these outcomes were the result of the HT being twisted more open relative to the LT shaft at impact.  相似文献   

On enhancing the robustness of timeline summarization test collections     

Richard McCreadie  Shahzad Rajput  Ian Soboroff  Craig Macdonald  Iadh Ounis 《Information processing & management》2019,56(5):1815-1836

Timeline generation systems are a class of algorithms that produce a sequence of time-ordered sentences or text snippets extracted in real-time from high-volume streams of digital documents (e.g. news articles), focusing on retaining relevant and informative content for a particular information need (e.g. topic or event). These systems have a range of uses, such as producing concise overviews of events for end-users (human or artificial agents). To advance the field of automatic timeline generation, robust and reproducible evaluation methodologies are needed. To this end, several evaluation metrics and labeling methodologies have recently been developed - focusing on information nugget or cluster-based ground truth representations, respectively. These methodologies rely on human assessors manually mapping timeline items (e.g. sentences) to an explicit representation of what information a ‘good’ summary should contain. However, while these evaluation methodologies produce reusable ground truth labels, prior works have reported cases where such evaluations fail to accurately estimate the performance of new timeline generation systems due to label incompleteness. In this paper, we first quantify the extent to which the timeline summarization test collections fail to generalize to new summarization systems, then we propose, evaluate and analyze new automatic solutions to this issue. In particular, using a depooling methodology over 19 systems and across three high-volume datasets, we quantify the degree of system ranking error caused by excluding those systems when labeling. We show that when considering lower-effectiveness systems, the test collections are robust (the likelihood of systems being miss-ranked is low). However, we show that the risk of systems being mis-ranked increases as the effectiveness of systems held-out from the pool increases. To reduce the risk of mis-ranking systems, we also propose a range of different automatic ground truth label expansion techniques. Our results show that the proposed expansion techniques can be effective at increasing the robustness of the TREC-TS test collections, as they are able to generate large numbers missing matches with high accuracy, markedly reducing the number of mis-rankings by up to 50%.  相似文献   

Introduction: Performative Afterlife     

Swen Steinhäuser  Neil Macdonald 《Parallax》2018,24(1):1-10

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Parental history of positive development and child behavior in next generation offspring: A two-cohort prospective intergenerational study     

Primrose Letcher  Christopher J. Greenwood  Helena McAnally  Jay Belsky  Jacqui A. Macdonald  Elizabeth A. Spry  Kimberly C. Thomson  Meredith O'Connor  Judith Sligo  George Youssef  Jennifer E. McIntosh  Ella Iosua  Delyse Hutchinson  Joyce Cleary  Ann V. Sanson  George C. Patton  Robert J. Hancox  Craig A. Olsson 《Child development》2023,94(1):60-73

This study examined whether positive development (PD) in adolescence and young adulthood predicts offspring behavior in two Australasian intergenerational cohorts. The Australian Temperament Project Generation 3 Study assessed PD at age 19–28 (years 2002–2010) and behavior in 1165 infants (12–18 months; 608 girls) of 694 Australian-born parents (age 29–35; 2012–2019; 399 mothers). The Dunedin Multidisciplinary Health and Development Parenting Study assessed PD at age 15–18 (years 1987–1991) and behavior in 695 preschoolers (3–5 years; 349 girls) and their New Zealand born parents (age 21–46; 1994–2018; 363 mothers; 89% European ethnicity). In both cohorts, PD before parenthood predicted more positive offspring behavior (β_range = .11–.16) and fewer behavior problems (β_range = −.09 to −.11). Promoting strengths may secure a healthy start to life.  相似文献   

Is global neo-liberalism shaping the future of physical education?     

Doune Macdonald 《Physical Education & Sport Pedagogy》2014,19(5):494-499

With claims that neo-liberalism is the ‘specific defining political/economic paradigm of the age in which we live?…?’ [Apple, Michael. 2006. Educating the ‘Right’ Way: Markets, Standards, God, and Inequality. New York: Taylor & Francis, 14.], an invited symposium at the 2012 International Convention on Science, Education and Medicine in Sport (ICSEMIS), under the auspices of the Association Internationale des Ecoles Superieures d'Education Physique (AIESEP), sought to consider if, globally, physical education has been touched by neo-liberalism. Entitled School Physical Education Curricula for Future Generations: Global Patterns? Global Lessons? the symposium featured six speakers from Africa, Australia, Korea, New Zealand, UK, and the USA. Each of the speakers articulated the impact of instantiations of neo-liberalism on their countries’ physical education curricula, resources, practices, status, and teacher education. The speakers’ accounts suggest ‘the indigenization of neoliberalism in different places, the spatial unevenness of its spread, and?…?its articulations and intersections with other political-cultural formations and governing projects?…?.’. [Kingfisher, Catherine, and Jeff Maskovsky. 2008. “Introduction the Limits of Neoliberalism.” Critique of Anthropology 28 (2): 115–126.]  相似文献   

‘Do I have a choice?’ The influences of family values and investments on Chinese migrant young people's lifestyles and physical activity participation in Australia     

Bonnie Pang  Doune Macdonald  Peter Hay 《Sport, Education and Society》2015,20(8):1048-1064

This paper examines Chinese migrant young people's lifestyles and physical activity experiences in relation to the values and cultural investments of their families in Australia. The data in this paper were taken from a larger-scale study underpinned by a critical and interpretive ethnographic method conducted in two school sites. The young people's lives were significantly shaped by dominant Chinese cultural norms and traditional notions of gender. Bourdieuian concepts are drawn upon to explain the (re)production of the Chinese young people's habitus cultivated at home. Based on the young people's pursuit of cultural capital as a consequence of familial values, discussion also focuses on the agency of these young people in relation to their lifestyle choices. Dominant discourses in the ‘talk’ of these young people included their notions of excelling, hyper-investment in academic success and, especially for the girls, skin colour and safety. Traditional Chinese family power relations limited the choices these young people had regarding physical activity which was complicated by the cultural and social fluidity of their lived experiences. The inter-generational flow of habitus and capital of these Chinese migrant young people's families tended to privilege a particular set of discourses based on gender, race, social class and hierarchical practices that resonated with traditional Confucian philosophy.  相似文献