Digital Module 16: Longitudinal Data Analysis     

Jeffrey R. Harring  Tessa L. Johnson 《Educational Measurement》2020,39(3):137-138

In this digital ITEMS module, Dr. Jeffrey Harring and Ms. Tessa Johnson introduce the linear mixed effects (LME) model as a flexible general framework for simultaneously modeling continuous repeated measures data with a scientifically defensible function that adequately summarizes both individual change as well as the average response. The module begins with a nontechnical overview of longitudinal data analyses drawing distinctions with cross-sectional analyses in terms of research questions to be addressed. Nuances of longitudinal designs, timing of measurements, and the real possibility of missing data are then discussed. The three interconnected components of the LME model—(1) a model for individual and mean response profiles, (2) a model to characterize the covariation among the time-specific residuals, and (3) a set of models that summarize the extent that individual coefficients vary—are discussed in the context of the set of activities comprising an analysis. Finally, they demonstrate how to estimate the linear mixed effects model within an open-source environment (R). The digital module contains sample R code, diagnostic quiz questions, hands-on activities in R, curated resources, and a glossary.  相似文献   

Digital Module 05: Diagnostic Measurement—The G‐DINA Framework https://ncme.elevate.commpartners.com     

Wenchao Ma  Jimmy de la Torre 《Educational Measurement》2019,38(2):114-115

In this ITEMS module, we introduce the generalized deterministic inputs, noisy “and” gate (G‐DINA) model, which is a general framework for specifying, estimating, and evaluating a wide variety of cognitive diagnosis models. The module contains a nontechnical introduction to diagnostic measurement, an introductory overview of the G‐DINA model, as well as common special cases, and a review of model‐data fit evaluation practices within this framework. We use the flexible GDINA R package, which is available for free within the R environment and provides a user‐friendly graphical interface in addition to the code‐driven layer. The digital module also contains videos of worked examples, solutions to data activity questions, curated resources, a glossary, and quizzes with diagnostic feedback.  相似文献   

Using the Information Structure Model to Compare Profile-Based Information Filtering Systems     

Yuval Elovici  Bracha Shapira  Paul B. Kantor 《Information Retrieval》2003,6(1):75-97

In the IR field it is clear that the value of a system depends on the cost and benefit profiles of its users. It would seem obvious that different users would prefer different systems. In the TREC-9 filtering track, systems are evaluated by a utility measure specifying a given cost and benefit. However, in the study of decision systems it is known that, in some cases, one system may be unconditionally better than another. In this paper we employ a decision theoretic approach to find conditions under which an Information Filtering (IF) system is unconditionally superior to another for all users regardless of their cost and benefit profiles.It is well known that if two IF systems have equal precision the system with better recall will be preferred by all users. Similarly, with equal recall, better precision is universally preferred. We confirm these known results and discover an unexpected dominance relation in which a system with lower recall will be universally preferred provided its precision is sufficiently higher.  相似文献   

物理模型与股票投资     

李勇英 《天水师范学院学报》2003,23(2):60-61

股票投资的方法很多，建立物理模型进行投资是一种简明有效的方法，使用金字塔模型和平衡理论对股票进行操作，能把握最佳投资机会。  相似文献   

<体育与健康课程标准>实施进程研究   总被引：9，自引：0，他引：9  

何元春  于晓东 《成都体育学院学报》2003,29(4):81-83

经过反复的调查和对文献资料的分析，初步提出：体育与健康课程模式的多元化，是新“课标”由目标理念向操作化进程的有效途径。课程模式多元化，要以单元为基础，构建模块组合；以新“课标”为母体，构建子项模式；以新“课标”为依据，完善结构体系；以模式为中介，超越课程模式。  相似文献   

关于三段论一般规则存在依据的思考     

马养新 《陕西师范大学学报(哲学社会科学版)》2001,30(1):83-91

三段论理论是人类有史以来第一个真正的理论体系.选择有效式是构造三段论理论重要的一环.三段论一般规则是一种最简单实用的选择方法,但却存在理由不足的缺陷.包含关系的概念内涵之间所具有的蕴涵关系,能够单一地引申或者说充分地论证三段论全部一般规则,甚至能直接识别出三段论每一个具体的有效式,从而为采用一般规则做有效式选择标准的三段论理论提供了可靠的理论依据.  相似文献   

Norm‐ and Criterion‐Referenced Student Growth     

D. Betebenner 《Educational Measurement》2009,28(4):42-51

  相似文献   

田径运动技术模式的研究     

王志文 《体育科学研究》2001,5(4):39-40

田径运动技术是指田径运动中符合人体运动科学原理、能充分发挥人体潜在能力,能有效地完成动作的合理方法、技能和手段,田径运动技术系统包括外在技术、身体技术、心理技术、社会技术和场地技术等几个部分,每个部分又包含不同的构成元素,各元素之间不同形式的联系形成了不同的田径运动技术模式.  相似文献   

论体育教学模式研究的现状与未来发展   总被引：26，自引：1，他引：25  

邵伟德  尚志强 《北京体育大学学报》2005,28(1):85-87

通过文献资料法、理论分析法对近10年来的体育教学模式研究总体情况进行了研究,肯定了体育教学模式研究中的成绩,指出了存在的问题,并分析了今后体育教学模式研究的发展趋势.  相似文献   

运动项目推广中的形象代言人分析     

柴红年 《天津体育学院学报》2005,20(4):44-45

在查阅相关文献资料的基础上,对运动项目推广中的形象代言人进行研究,认为在选择形象代言人时,要充分考虑普通大众的想法和意见,运用科学的方法选择运动员形象代言人,充分展现运动项目的精神理念;选择明星运动员、有潜力的运动员和普通人作为形象代言人;选定形象代言人后,就要对其进行全方位的包装宣传和约束管理;我国各运动项目管理部门需要对运动项目的资源进行充分调查,有意识地选择合适的运动员形象代言人,促进各种运动项目在我国的发展。  相似文献