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   

泰山旅游结构层次及其匹配开发策略研究     

张建中 《资源科学》1997,19(4):69-76

本文运用旅游结构转换原理，分析了泰山旅游风景资源结构、行为层次结构、市场结构的特征及匹配性关系，找出21世纪泰山旅游持续发展的主要障碍，提出相关的发展策略。文章认为，泰山旅游风景资源的主导特征为博大精深的民族文化与雄伟壮丽的资源风景的有机融合，泰山旅游应以.风景资源结构、旅游行为层次、市场结构、匹配策略  相似文献   

Searching for Safety Online: Managing "Trolling" in a Feminist Forum     

Susan Herring  Kirk Job-Sluder  Rebecca Scheckler  Sasha Barab 《The Information Society》2002,18(5):371-384

A common phenomenon in online discussion groups is the individual who baits and provokes other group members, often with the result of drawing them into fruitless argument and diverting attention from the stated purposes of the group. This study documents a case in which the members of an online community--a feminist web-based discussion forum--are targeted by a "troll" attempting to disrupt their discussion space. We analyze the strategies that make the troller successful and the targeted group largely ineffectual in responding to his attack, as a means to understand how such behavior might be minimized and managed in general. The analysis further suggests that feminist and other nonmainstream online forums are especially vulnerable, in that they must balance inclusive ideals against the need for protection and safety, a tension that can be exploited by disruptive elements to generate intragroup conflict.  相似文献   

经济转轨时期发展高技术产业的政府行为   总被引：2，自引：0，他引：2  

胡大平  邹珊刚 《科研管理》1997,18(5):1-6

本文从我国高技术产业发展及管理模式的现状分析入手，主要研究由计划经济向市场经济转轨时期，我国发展高技术产业的政府行为的特点，探讨在社会主义市场经济的条件下，政府行为模式在发展高技术产业中的宏观调控作用  相似文献   

Domesticating Computers and the Internet   总被引：1，自引：0，他引：1  

Jonathon N. Cummings  Robert Kraut 《The Information Society》2002,18(3):221-231

The people who use computers and the ways they use them have changed substantially over the past 25 years. In the beginning highly educated people, mostly men, in technical professions used computers for work, but over time a much broader range of people are using computers for personal and domestic purposes. This trend is still continuing, and over a shorter time scale has been replicated with the use of the Internet. This paper uses data from four national surveys to document how personal computers and the Internet have become increasingly domesticated since 1995 and to explore the mechanisms for this shift. Now people log on more often from home than from places of employment and do so for pleasure and for personal purposes rather than for their jobs. Analyses comparing veteran Internet users to novices in 1998 and 2000 and analyses comparing the change in use within a single sample between 1995 and 1996 support two complementary explanations for how these technologies have become domesticated. Women, children, and less well-educated individuals are increasingly using computers and the Internet and have a more personal set of motives than well-educated men. In addition, the widespread diffusion of the PC and the Internet and the response of the computing industry to the diversity in consumers has led to a rich set of personal and domestic services.  相似文献   

武汉市三镇居民的消费文化差异     

王晶晶 《武汉职业技术学院学报》2007,6(1):25-28

地域特点决定文化差异,从而形成消费者行为的不同特点。通过分析武汉三镇不同地域文化形成的历史渊源,描述了三镇鲜明的区域性文化差异,进而归纳综述了由此产生的武汉市民消费行为模式的区域性差异。  相似文献   

移动学习平台用户使用意愿影响因素研究——基于移动情境和心流体验的技术接受模型     

许雪琦  张娅雯 《电化教育研究》2020,(3):69-75,84

移动计算技术与各类信息终端的进步,极大促进了基于“互联网+”的移动学习平台的发展。当前,纷繁的在线学习平台面临着用户不易接受、满意度和使用率低等诸多问题。基于信息系统技术接受和使用统一整合理论(UTUAT),结合移动情境和心流体验理论,针对当前用户群较为广泛的英语在线学习平台,通过问卷调查数据,对用户在线学习的情境和技术接受感知行为进行深入研究,构建了移动学习平台的用户使用行为模型。数据分析显示,心流体验、感知移动性和服务质量对学习用户的持续使用意愿均有显著影响,在线学习的内容质量通过心流体验对用户行为产生间接影响;感知成本因素方面,付费的移动学习平台对用户行为的影响比免费平台相对显著,但均未通过显著性检验。上述研究方法和结论,对各类移动学习平台的用户行为研究具有一定的参考价值。  相似文献   

房地产开发土地增值收益分配及相关利益主体行为分析     

蒋红 《科技广场》2015,(2)

房地产开发为我国土地增值过程中由于供不应求、投资开发、用途转变等原因产生增值。以土地租税费制度为依据的我国现行土地增值收益分配模式已然不能满足相关利益主体对土地增值收益的需要。中央政府、地方政府、开发商、商业银行、投资者等在不同层面、不同程度地参与了土地增值收益的分配,在其相互之间行为博弈的情况下,形成了土地增值收益的分配格局,从而刺激了他们对土地增值收益的非理性追逐。因此,通过对我国现行土地租税费制度的阐述和对在房地产开发过程中相关利益主体的行为分析,重构均衡各主体之间利益的土地增值收益分配模式。  相似文献   

Behavior problems of children in foster care: Associations with foster mothers’ representations,commitment, and the quality of mother–child interaction     

《Child abuse & neglect》2015

This study investigated different environmental and contextual factors associated with maltreated children's adjustment in foster care. Participants included 83 children (52 boys), ages 1–7 years, and their foster caregivers. Quality of interaction with the foster caregiver was assessed from direct observation of a free-play situation; foster caregiver attachment state of mind and commitment toward the child were assessed using two interviews; disruptive behavior symptoms were reported by foster caregivers. Results showed that quality of interaction between foster caregivers and children were associated with behavior problems, such that higher-quality interactions were related to fewer externalizing and internalizing problems. Foster caregivers’ state of mind and commitment were interrelated but not directly associated with behavior problems of foster children. Type of placement moderated the association between foster caregiver commitment and foster child behavior problems. Whereas greater foster caregiver commitment was associated with higher levels of adjustment for children in foster families (kin and non-kin), this was not the case in foster-to-adopt families. Finally, the associations between foster child behavior problems and history of maltreatment and placement related-risk conditions fell below significance after considering child age and quality of interaction with the foster caregiver. Findings underscore the crucial contribution of the foster caregiver–child relationship to fostering child adjustment and, thereby, have important implications for clinical services offered to this population.  相似文献   

国外基于工作任务的信息搜索行为研究进展*     

黄传慧 《科技管理研究》2021,41(19):211-216

系统地梳理国外相关文献,旨在把握国外信息搜索行为研究进展,揭示国外信息搜索行为研究视角、研究方法、研究内容和研究趋势,以期为我国信息搜索行为研究提供借鉴和参考.对94篇文献采用综合、归纳、比较等方法进行综合分析,在知识脉络研究部分分研究对象、研究方法、研究内容进行梳理,信息搜索行为研究内容按科研人员、大学生、专业技术人员、其他人群分别进行述评.国外基于工作任务的信息搜索行为研究进展对我国搜索行为研究的启示,一是研究对象上要扩宽;二是在研究方法上寻求突破和创新;三是跨学科合作研究.  相似文献