Application of network meta-analysis in the field of physical activity and health promotion     

Xiwen Su  Daniel J. McDonough  Haitao Chu  Minghui Quan  Zan Gao 《运动与健康科学(英文)》2020,9(6):511-520

Continued advancement in the field of physical activity and health promotion relies heavily on the synthesis of rigorous scientific evidence. As such, systematic reviews and meta-analyses of randomized controlled trials have led to a better understanding of which intervention strategies are superior (i.e., produce the greatest effects) in physical activity-based health behavior change interventions. Indeed, standard meta-analytic approaches have allowed researchers in the field to synthesize relevant experimental evidence using pairwise procedures that produce reliable estimates of the homogeneity, magnitude, and potential biases in the observed effects. However, pairwise meta-analytic procedures are only capable to discerning differences in effects between a select intervention strategy and a select comparison or control condition. In order to maximize the impact of physical activity interventions on health-related outcomes, it is necessary to establish evidence concerning the comparative efficacy of all relevant physical activity intervention strategies. The development of network meta-analysis (NMA)—most commonly used in medical-based clinical trials—has allowed for the quantification of indirect comparisons, even in the absence of direct, head-to-head trials. Thus, it stands to reason that NMA can be applied in physical activity and health promotion research to identify the best intervention strategies. Given that this analysis technique is novel and largely unexplored in the field of physical activity and health promotion, care must be taken in its application to ensure reliable estimates and discernment of the effect sizes among interventions. Therefore, the purpose of this review is to comment on the potential application and importance of NMA in the field of physical activity and health promotion, describe how to properly and effectively apply this technique, and suggest important considerations for its appropriate application in this field. In this paper, overviews of the foundations of NMA and commonly used approaches for conducting NMA are provided, followed by assumptions related to NMA, opportunities and challenges in NMA, and a step-by-step example of developing and conducting an NMA.  相似文献   

Improving cognitive and physical function through 12-weeks of resistance training in older adults: Randomized controlled trial     

Paulo Ricardo Pereira Dos Santos  Bruno Remígio Cavalcante  Andreya Karolyne Dos Santos Vieira  Marcos Duarte Guimarães  Antônio Marconi Leandro Da Silva  Anderson Da Costa Armstrong 《Journal of sports sciences》2020,38(17):1936-1942

ABSTRACT

We performed a randomized, controlled trial to analyse the effects of resistance training (RT) on cognitive and physical function among older adults. Fifty participants (mean age 67 years, ~60% woman) were randomly assigned to an RT program or a control group. Participants allocated to RT performed three sets of 10-15RM in nine exercises, three times per week, for 12-weeks. Control group did not perform any exercise. Variables included cognitive (global and executive function) and physical function (gait, mobility and strength) outcomes. At completion of the intervention, RT was shown to have significantly mitigated the drop in selective attention and conflict resolution performance (Stroop test: -494.6; 95%CI: -883.1; ?106.1) and promoted a significant improvement in working memory (digit span forward: -0.6; 95%CI: ?1.0; ?0.1 and forward minus backward: -0.9; 95% CI: ?1.6; ?0.2) and verbal fluency (animal naming: +1.4, 95%CI 0.3, 2.5). No significant between-group differences were observed for other cognitive outcomes. Regarding physical function, at completion of the intervention, the RT group demonstrated improved fast-pace gait performance (?0.3; 95% CI: ?0.6; ?0.0) and 1-RM (+21.4 kg; 95%CI: 16.6; 26.2). No significant between-group differences were observed for other mobility-related outcomes. In conclusion, RT improves cognitive and physical function of older adults.  相似文献   

Bidirectional longitudinal relationship between Chinese children's compounding awareness and vocabulary knowledge from Grades 3 to 6     

Ruibo Xie  Xinchun Wu  Thi Phuong Nguyen  Ying Zhao  Jie Feng 《Journal of Research in Reading》2020,43(4):482-495

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自然语言转换为受控语言的语义工具——入口词表模块     

刘华梅  侯汉清 《情报科学》2007,25(1):93-96,112

美国伯克莱大学近年来开发设计的语义工具———入口词表模块(EVM),目标是实现自然语言到受控语言的转换。本文详细介绍了EVM的创建过程和实现机制,首先利用数据检索代理和清洗代理从远程数据库中下载记录;然后抽取代理和构建代理利用下载的数据,采用统计学的方法计算自然语言词汇和受控语言词汇之间的关系,构建关联词典;最后由桌面代理和领域代理提供给用户感兴趣的领域,帮助用户进行检索。另外还列举了目前已经建立的几种模块,如INSPEC、MEDLINE、PATENTS等。最后还提出了这一项目未来需要改进的工作。  相似文献   

对外汉语词汇习得的研究及其在教学上的启发     

樊莉 《安阳工学院学报》2005,(5):146-147

词汇教学是对外汉语教学的一个薄弱环节.近几年,许多专家学者开始对词汇的习得规律进行研究并取得了显著的成就.把对词汇的习得规律研究的成果运用到教学领域,将对词汇教学起到极大的推动作用.  相似文献   

PETS--词汇突破     

贾玲 《安阳工学院学报》2005,(3):152-153

全国公共英语等级考试作为一种新型的考试,试图取代所有现有的英语考试,那么对于所有出于不同目的报考不同等级的考生来说该如何备考成为一个关键性问题.词汇是语言的基础.  相似文献   

汉语词汇宏观研究方法论     

吴继刚 《鞍山师范学院学报》2017,19(1)

汉语词汇宏观研究方法是对所有的汉语词汇或某一类汉语词汇的研究方法,是对汉语词汇的整体关照和研究.本文具体阐述调查法、归纳法、统计法、演绎法、比较法、系联法、共时描写、历时考察等八种宏观的词汇研究方法.  相似文献   

Impact of the National Writing Project's College-Ready Writers Program in High-Need Rural Districts     

H. Alix Gallagher  Nicole Arshan  Katrina Woodworth 《Journal of research on educational effectiveness》2017,10(3):570-595

By 2013, all 50 states and the District of Columbia had adopted college- and career-ready standards in English language arts and mathematics, placing a greater emphasis on argument writing to prepare students for life after high school. Solving the specific problem of how to help teachers teach to new standards for argument writing as well as the broader problem of improving teaching and learning requires continued efforts to understand how to support teachers in making substantial changes in instruction. This paper reports on a district-randomized controlled trial of the National Writing Project's College-Ready Writers Program (CRWP), implemented in high-need rural districts in 10 states, testing one instance of professional development paired with supporting curricular resources and a formative assessment tool designed to shift instruction to align with the new college- and career-ready standards in English language arts classes in Grades 7–10. Researchers randomly assigned 44 rural districts either to receive two years of CRWP or to be in a business-as-usual control group and found positive impacts on teacher practice and student source-based argument writing.  相似文献   

语文自主学习策略和实践指导     

许嘉 《闽西职业技术学院学报》2005,7(2):63-67

从自主的角度考虑,学习策略应用的关键在于调控技能。如何让学生具备对学习过程及自我意识的调控,拟以《花的话》的学习为例,探讨提高学生自主阅读理解能力的策略和实践指导的方法。  相似文献   

从认知语言学角度谈英语词汇教学     

崔林  郭志勇 《鞍山师范学院学报》2007,9(1):81-83

对英语教学来说,词汇教学既是核心又是难点.掌握一定的词汇量是学生熟练运用英语的先决条件.本文将借助认知语言学的范畴化、原型理论和隐喻概念来探讨外语教学中词汇教学的新的有效途径.  相似文献