Reliability and validity of Yo-Yo tests in 9- to 16-year-old football players and matched non-sports active schoolboys     

Susana C. A. Póvoas  Carlo Castagna  José M. C. Soares  Pedro M. R. Silva  Mariana V. M. F. Lopes 《European Journal of Sport Science》2016,16(7):755-763

The purpose of this study was to examine the test–retest reliability and construct validity of three age-adapted Yo-Yo intermittent tests in football players aged 9–16 years (n?=?70) and in age-matched non-sports active boys (n?=?72). Within 7 days, each participant performed two repetitions of an age-related intensity-adapted Yo-Yo intermittent test, i.e. the Yo-Yo intermittent recovery level 1 children's test for 9- to 11-year-olds; the Yo-Yo intermittent endurance level 1 for 12- to 13-year-olds and the Yo-Yo intermittent endurance level 2 test for 14- to 16-year-olds. Peak heart rate (HR_peak) was determined for all tests. The distance covered in the tests was 57% (1098?±?680 vs. 700?±?272?m), 119% (2325?±?778 vs. 1062?±?285?m) and 238% (1743?±?460 vs. 515?±?113?m) higher (p?≤?.016), respectively for football-trained than for non-sports active boys aged 9–11, 12–13 and 14–16 years. The typical errors of measurement for Yo-Yo distance, expressed as a percentage of the coefficient of variation (confidence interval), were 11.1% (9.0–14.7%), 10.1% (8.1–13.7%) and 8.5% (6.7–11.7%) for football players aged 9–11, 12–13 and 14–16 years, respectively, with corresponding values of 9.3% (7.4–12.8%), 10.2% (8.1–14.0%) and 8.5% (6.8–11.3%) for non-sports active boys. Intraclass correlation coefficient values for test–retest were excellent in both groups (range: 0.844–0.981). Relative HR_peak did not differ significantly between the groups in test and retest. In conclusion, Yo-Yo intermittent test performances and HR_peak are reliable for 9- to 16-year-old footballers and non-sports active boys. Additionally, performances of the three Yo-Yo tests were seemingly better for football-trained than for non-sports active boys, providing evidence of construct validity.  相似文献   

What might the school of 2030 be like? An exercise in social science fiction     

Neil Selwyn  Luci Pangrazio  Selena Nemorin  Carlo Perrotta 《Learning, Media and Technology》2020,45(1):90-106

ABSTRACT

This article addresses the deliberately speculative question of ‘What might the school of 2030 be like?’, with a specific focus on the influences of digital technologies. The article adopts the methodological approach of ‘social science fiction’ to explore the ways in which digital technologies might be used in one Australian high school in 2030 (Lakeside), and what this might mean for the people whose lives are enmeshed with these technologies. Through the co-construction of five social science fiction ‘vignettes’ about life within Lakeside, the article considers the increasing prevalence of dataveillance, digital deskilling and the de-territorialization of schooling. The article then goes on to consider changing relationships between time/place, material and coded structures, as well as the increasingly platformized and data-driven nature of schooling in the 2020s. The article ends by considering the ways in which critical scholars can continue to use the methodological approach of social science fiction writing with regard to unpacking the politics of digital education futures.  相似文献   

Public Money and Private Providers: Funding Channels and National Patterns in Four Countries     

Carlo Salerno 《Higher Education》2004,48(1):101-130

A rich body of literature has emerged that seeks to shed further light on how concepts like globalization and internationalization shape higher education systems and their institutions. This paper examines how the rise of private higher education in various national contexts has engendered global patterns of public financial support for private institutions and particularly the various ways in which public funding is channeled to such providers. A cross-national typology of public/private higher education sectors and a system-level map of how public funding is directed to institutions are both used to explain why different patterns may emerge. This framework is then used to examine the policies and practices in four representative systems: England, Germany, New Zealand, and the state of Pennsylvania in the United States. The available evidence suggests that in systems with weak or newly emerging private sectors, unclear regulations and concerns about quality implies that public funding tends to be channeled into private institutions indirectly (e.g. through tax-abatements and student financial aid). In systems where private institutions play a more substantial role, public funding is channeled to privates using a mix of indirect and direct mechanisms.  相似文献   

Children “scientists” know the reasons why and they are “poets” too. Non-randomized controlled trial to evaluate the effectiveness of a strategy aimed at improving the learning of scientific concepts     

Lucia Bigozzi  Annibale Biggeri  Filippo Boschi  Paola Conti  Carlo Fiorentini 《European Journal of Psychology of Education - EJPE》2002,17(4):343-362

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Maternal warmth and prosocial behaviors among low-SES adolescents: Considering interactions between empathy and moral conviction     

Alexandra N. Davis  Gustavo Carlo 《Journal of moral education》2020,49(2):226-240

ABSTRACT

The study examined the links among maternal warmth and adolescents’ empathic concern, moral conviction and prosocial behaviors. Participants were 311 adolescents from a low-income community (M age = 16.10 years; range = 14–19 years; 58.7% girls; 82.7% white; 13.6% Latinx). The results demonstrated that maternal warmth was positively associated with adolescents’ empathic concern and moral conviction. Empathic concern was positively associated with three common forms of prosocial behaviors, and moral conviction was positively associated with four types of prosocial behaviors. Empathic concern and moral conviction also interacted to predict selfishly and selflessly motivated prosocial behaviors. Discussion will focus on the role of maternal warmth in fostering sociomoral tendencies.  相似文献   

The Longitudinal Associations Among Temperament,Parenting, and Turkish Children's Prosocial Behaviors          下载免费PDF全文

Deborah J. Laible  Asiye Kumru  Gustavo Carlo  Cara Streit  Bilge Selcuk  Melike Sayil 《Child development》2017,88(4):1057-1062

In Turkey, responsive behaviors toward kin are expected from children. Despite this, we know little about the factors that influence young Turkish children's prosocial behaviors. The goal was to explore how temperament and parenting are related to children's prosocial development in Turkey. A total of 293 Turkish children (M_age = 49 months; 48.12% females) were followed up for 3 years. Mothers completed measures of their child's prosocial behaviors, as well as measures of their warmth, inductive reasoning, and the child's approach and reactivity. Maternal warmth predicted children's reactivity, and maternal induction predicted children's sociability. Children's reactivity was inversely related to children's helping behavior and sociability was related to more prosocial behavior. Maternal warmth had indirect links with helping through lessening children's reactivity.  相似文献   

Reliability based multiobjective optimization for design of structures subject to random vibrations     

Giuseppe Carlo Marano 《浙江大学学报(A卷英文版)》2008,9(1):15-25

Based on a multiobjective approach whose objective function （OF） vector collects stochastic reliability performance and structural cost indices, a structural optimization criterion for mechanical systems subject to random vibrations is presented for supporting engineer＇s design. This criterion differs from the most commonly used conventional optimum design criterion for random vibrating structure, which is based on minimizing displacement or acceleration variance of main structure responses, without considering explicitly required performances against failure. The proposed criterion can properly take into account the design-reliability required performances, and it becomes a more efficient support for structural engineering decision making. The multiobjective optimum （MOO） design of a tuned mass damper （TMD） has been developed in a typical seismic design problem, to control structural vibration induced on a multi-storey building structure excited by nonstationary base acceleration random process A numerical example for a three-storey building is developed and a sensitivity analysis is carried out. The results are shown in a useful manner for TMD design decision support.  相似文献   

Higher education and its communities: Interconnections, interdependencies and a research agenda   总被引：2，自引：0，他引：2  

Ben Jongbloed  Jürgen Enders  Carlo Salerno 《Higher Education》2008,56(3):303-324

Universities everywhere are being forced to carefully reconsider their role in society and to evaluate the relationships with their various constituencies, stakeholders, and communities. In this article, stakeholder analysis is put forward as a tool to assist universities in classifying stakeholders and determining stakeholder salience. Increasingly universities are expected to assume a third mission and to engage in interactions with industrial and regional partners. While incentive schemes and government programmes try to encourage universities to reach out more to external communities, some important barriers to such linkages still remain. To fulfil their obligation towards being a socially accountable institution and to prevent mission overload, universities will have to carefully select their stakeholders and identify the ‘right’ degree of differentiation. For the university, thinking in terms of partnerships with key stakeholders has important implications for its governance and accountability arrangements. For the future of the universities we foresee a change towards networked governance and arrangements to ensure accountability along the lines of corporate social responsibility. In order to further explore some of these concepts and to empirically investigate the tendencies suggested here, this article proposes an ambitious research agenda for tackling the emerging issues of governance, stakeholder management and higher education’s interaction with society.  相似文献   

Teacher judgments and pupils’ causal explanations: Social valorization of effort-based explanations in school context     

Maria Cristina Matteucci  Carlo Tomasetto  Patrizia Selleri  Felice Carugati 《European Journal of Psychology of Education - EJPE》2008,23(4):421-432

Achievement evaluation in school contexts may be considered as a kind of social judgment, which is affected by social and moral determinants since it is not merely an estimation of pupils’ accomplishment (Dompnier, Pansu, & Bressoux, 2006; Weiner, 2003). Teachers’ judgments have been investigated starting from the analysis of two theoretical approaches: the norm of internality (Dubois, 2003), and the attributional approach to social motivation (Weiner, 2006). In order to study the social valorization of internal explanations referring to effort in school context, an empirical research has been conducted. Our study investigates how teachers evaluate fictitious pupils, which are supposed to explain events by means of different types of causal explanations. According to our results, pupils providing effort-based explanations receive more positive judgments. Findings are discussed by considering effort as a key principle of school environments.  相似文献   

Beyond rational choice: How teacher engagement with technology is mediated by culture and emotions     

Carlo Perrotta 《Education and Information Technologies》2017,22(3):789-804

This paper focuses on the relationship between rational beliefs, culture and agency in formal school settings. This relationship is analysed in the context of the adoption of technological innovations. Interviews and focus groups with 39 secondary teachers from England and other European countries were carried out. The analysis highlights a number of cultural differences between English teachers and their continental colleagues. The paper argues against a linear and simplistic appropriation of rational choice theory in educational research, whereby individual behaviour is examined from the perspective of individualist psychology and micro-economic theory without considering models of culturally informed agency beyond self-interest and calculation. In the conclusion, the paper argues that explanations of teacher agency in relation to technology must take into account the role of rationality and emotionality - not as a binary opposition that reflects actual psychological qualities that teachers may or may not possess, but as phenomena to be unpacked: competing (and culturally shaped) discursive strategies enacted to make sense of the world.  相似文献