Are the Yo-Yo intermittent recovery test levels 1 and 2 both useful? Reliability,responsiveness and interchangeability in young soccer players     

Maurizio Fanchini  Carlo Castagna  Aaron J. Coutts  Federico Schena  Alan McCall  Franco M. Impellizzeri 《Journal of sports sciences》2014,32(20):1950-1957

Abstract

The aim of this study was to compare the reliability, internal responsiveness and interchangeability of the Yo-Yo intermittent recovery test level 1 (YY1), level 2 (YY2) and submaximal YY1 (YY1-sub). Twenty-four young soccer players (age 17 ± 1 years; height 177 ± 7 cm; body mass 68 ± 6 kg) completed each test five times within pre- and in-season; distances covered and heart rates (HRs) were measured. Reliability was expressed as typical error of measurement (TEM) and intraclass correlation coefficient (ICC). Internal responsiveness was determined as effect size (ES) and signal-to-noise ratio (ES_TEM). Interchangeability was determined with correlation between training-induced changes. The TEM and ICC for distances in the YY1 and YY2 and for HR in YY1-sub were 7.3% and 0.78, 7.1% and 0.93 and 2.2% and 0.78, respectively. The ESs and ES_TEMs were 0.9 and 1.9 for YY1, 0.4 and 1.2 for YY2 and ?0.3 and ?0.3 for YY1-sub. Correlations between YY1 vs. YY2 and YY1-sub were 0.56 to 0.84 and ?0.36 to ?0.81, respectively. Correlations between change scores in YY1 vs. YY2 were 0.29 and ?0.21 vs. YY1-sub. Peak HR was higher in YY1 vs. YY2. The YY1 and YY2 showed similar reliability; however, they were not interchangeable. The YY1 was more responsive to training compared to YY2 and YY1-sub.  相似文献   

三万英尺高空的相对主义者——相对主义与科学的有效性可以共存吗？     

刘鹏 《科学技术与辩证法》2010,27(5):50-54

相对主义者必须要解决的一个难题是，如何保证相对主义与科学之有效性的共存。认识论的相对主义（如社会建构主义）主张将科学建立在社会基础之上，从而导致了相对主义与科学有效性的矛盾。“相对主义和科学的有效性”之争便是这一矛盾的直接体现。要解决这一问题，必须要做到以下三点：（1）用实践建构主义取代社会建构主义；（2）用本体论的相对主义取代认识论的相对主义；（3）用本体论化的科学取代作为认识论概念的科学。  相似文献   

运用双级数控选模法对体院教师工作状况(成绩)综合评定的实验研究     

刘新平  苏明理 《西安体育学院学报》1993,(2)

本文根据统计学原理、控制理论及人的认知规律研究设计出了双级数控选模评定模型,并试图将它应用于对体院教师工作状态(成绩)的综合考评,经过实验验证和理论分析,表明这一办法具有较强的科学性,且经济实用,达到了评定考核中减少人为因素影响、简化指标体系的目的。  相似文献   

浅谈如何提高散手摔法的有效性     

刘期努  文春辉 《搏击·武术科学》2006,3(12):46-47,49

文章从适应散手竞赛规则对摔法有效性的特殊要求入手,明确阐述散手摔法的本质内涵及其有效实施所应具备的条件;运用生物学知识和力学原理,并结合散手教学、训练、比赛中的实践经验,系统剖析影响散手摔法有效性的因素,以不断提高摔法的有效性,为进一步探讨散手实战能力的提高提供有益参考。  相似文献   

影响跳远运动员助跑准确性的因素及其克服的方法   总被引：4，自引：0，他引：4  

蔡元发 《体育科学研究》2001,5(4):41-42

在论述跳远运动员助跑准确性的重要性的基础上,提出了影响跳远运动员助跑准确性的因素及其克服的方法,同时,提出了提高运动员助跑准确性的训练方法和手段.  相似文献   

A Quantum Measurement Paradigm for Educational Predicates: Implications for validity in educational measurement     

Ian Cantley 《Educational Philosophy and Theory》2017,49(4):405-421

Abstract

The outcomes of educational assessments undoubtedly have real implications for students, teachers, schools and education in the widest sense. Assessment results are, for example, used to award qualifications that determine future educational or vocational pathways of students. The results obtained by students in assessments are also used to gauge individual teacher quality, to hold schools to account for the standards achieved by their students, and to compare international education systems. Given the current high-stakes nature of educational assessment, it is imperative that the measurement practices involved have stable philosophical foundations. However, this article casts doubt on the theoretical underpinnings of contemporary educational measurement models. Aspects of Wittgenstein’s later philosophy and Bohr’s philosophy of quantum theory are used to argue that a quantum theoretical rather than a Newtonian model is appropriate for educational measurement, and the associated implications for the concept of validity are elucidated. Whilst it is acknowledged that the transition to a quantum theoretical framework would not lead to the demise of educational assessment, it is argued that, where practical, current high-stakes assessments should be reformed to become as ‘low-stakes’ as possible. This article also undermines some of the pro high-stakes testing rhetoric that has a tendency to afflict education.  相似文献   

Screening for potential child maltreatment in parents of a newborn baby: The predictive validity of an Instrument for early identification of Parents At Risk for child Abuse and Neglect (IPARAN)     

《Child abuse & neglect》2017

For preventive purposes it is important to be able to identify families with a high risk of child maltreatment at an early stage. Therefore we developed an actuarial instrument for screening families with a newborn baby, the Instrument for identification of Parents At Risk for child Abuse and Neglect (IPARAN). The aim of this study was to assess the predictive validity of the IPARAN and to examine whether combining actuarial and clinical methods leads to an improvement of the predictive validity. We examined the predictive validity by calculating several performance indicators (i.e., sensitivity, specificity and the Area Under the receiver operating characteristic Curve [AUC]) in a sample of 4692 Dutch families with newborns. The outcome measure was a report of child maltreatment at Child Protection Services during a follow-up of 3 years. For 17 children (.4%) a report of maltreatment was registered. The predictive validity of the IPARAN was significantly better than chance (AUC = .700, 95% CI [.567–.832]), in contrast to a low value for clinical judgement of nurses of the Youth Health Care Centers (AUC = .591, 95% CI [.422–.759]). The combination of the IPARAN and clinical judgement resulted in the highest predictive validity (AUC = .720, 95% CI [.593–.847]), however, the difference between the methods did not reach statistical significance. The good predictive validity of the IPARAN in combination with clinical judgment of the nurse enables professionals to assess risks at an early stage and to make referrals to early intervention programs.  相似文献   

教育舆情研究:从兴起到有效的路径探索     

张天雪  张冉 《清华大学教育研究》2011,32(5)

教育舆情研究已由萌芽阶段进入到兴起阶段,但规范的教育舆情研究尚未形成。教育舆情研究要从研究主体、研究对象和研究手段等方面加以规范,规范的教育舆情研究会提升舆情效度。教育舆情的有效性来自于信息采集和舆情分析两个环节,需要专业的研究主体和研究手段,逐步形成相应的研究范式。这是教育政策决策的需要,也是教育治理过程中关注民生,体恤草根意愿的必然选择。  相似文献   

高校图书馆用户关系管理有效性评价指标体系初探     

罗琳 《图书馆学研究》2011,(5)

结合高校图书馆自身情况,参考相关文献的基础上,初选出19个指标对高校图书馆用户关系管理有效性进行评价。通过专家调查法,运用隶属度分析对理论指标进行了实证筛选,构建出以用户知识、用户互动、用户反应和用户价值实现为一级指标和从中细分的16个二级指标共同组成的高校图书馆用户关系管理有效性评价体系。  相似文献   

消费者网上支付系统采用的影响因素研究     

张国政  张芳芳 《科技与管理》2011,13(2):60-62

越来越多的消费者认可并接受网上支付,影响消费者网上支付的因素也非常多。本文在对相关文献进行回顾的基础上,结合中国电子商务市场的实际情况,提出了确定影响消费者网上支付采用的7个因素,并基于信度分析、效度分析及回归分析和对消费者使用网上支付平台的影响因素进行了实证研究。  相似文献