Checking Model Validity in Linear Regression     

JAMES W. COTTS 《Teaching Statistics》1987,9(3):82-89

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The Determinants of Students' Perceived Learning Outcomes and Satisfaction in University Online Education: An Empirical Investigation*   总被引：1，自引：0，他引：1  

Sean B. Eom  H. Joseph Wen  Nicholas Ashill 《Decision Sciences Journal of Innovative Education》2006,4(2):215-235

In this study, structural equation modeling is applied to examine the determinants of students' satisfaction and their perceived learning outcomes in the context of university online courses. Independent variables included in the study are course structure, instructor feedback, self‐motivation, learning style, interaction, and instructor facilitation as potential determinants of online learning. A total of 397 valid unduplicated responses from students who have completed at least one online course at a university in the Midwest were used to examine the structural model. The results indicated that all of the antecedent variables significantly affect students' satisfaction. Of the six antecedent variables hypothesized to affect the perceived learning outcomes, only instructor feedback and learning style are significant. The structural model results also reveal that user satisfaction is a significant predictor of learning outcomes. The findings suggest online education can be a superior mode of instruction if it is targeted to learners with specific learning styles (visual and read/write learning styles) and with timely, meaningful instructor feedback of various types.  相似文献   

大学生A型行为与心理健康的相关研究     

邢丹 《鞍山师范学院学报》2006,8(6):86-88

研究A型行为与大学生心理健康的相关,采用A型行为类型评定量表(TABP)和临床症状自评量表(SCL-90),对106名大学生分别进行A型行为与心理健康测量.研究结果表明大学生A型行为与心理健康及诸因子存在显著相关.  相似文献   

基于投入与产出的质量管理有效性研究     

贺金凤  徐济超  杨剑锋  王海宇 《科学学与科学技术管理》2005,26(12):146-150

质量管理有效性的评价涉及多个输入输出指标的综合评价。在构建质量管理有效性评价指标体系的基础上,利用数据包络分析法对质量管理有效性进行了评价,并进一步用典型相关分析法对有效企业和无效企业的主要影响因子做了提取和分析,为企业正确决策提供信息支持。  相似文献   

大亚湾近岸土地利用的时空分异及其与地貌因子关系分析   总被引：2，自引：0，他引：2  

张丹丹  杨晓梅  苏奋振  杜云艳  孙晓宇  薛振山 《资源科学》2010,32(8):1551-1557

综合运用GIS空间分析和数字地形分析方法,以地处海陆交接部位、具有优越地理区位和自然环境优势的大亚湾海岸带为研究区,利用我国1980年-1986年海岸带调查数据和2004年的908遥感调查数据对研究区的土地利用时空分异规律,及其与地貌因子的关系进行定量分析。结果表明:①大亚湾近岸陆域和潮间带滩涂的开发利用变化受到高程、坡度和地貌成因不同程度的影响,其中,高程和坡度对海湾近岸土地利用变化的影响较大,尤其是对农业用地,而地貌成因对其影响相对较小;②大亚湾近岸0～30m高程范围内,各种海湾开发利用类型变化最为显著;③大亚湾近岸农用地变化受坡度、高程影响较大,相关系数达到了0.8438和0.6857;林草地变化受地貌成因的影响较大,其相关系数为0.9344;水域变化受坡度的影响相对较大,相关性系数为0.4573。  相似文献   

基于Web of Science的论文使用次数和被引频次的相关性分析     

丁佐奇 《中国科技期刊研究》2017,28(12):1166-1170

【目的】 研究论文使用次数与被引频次的相关性,以判断使用次数是否可作为论文影响力评价的客观指标。【方法】 利用Web of Science(WoS)新推出的“文献级别用量指标”,对《中国天然药物》高使用和高被引论文的使用次数和被引频次的相关性进行研究,并研究整合替代医学学科论文使用次数对被引频次的表征意义。【结果】 被引频次、使用次数及使用次数(180天)三者之间互相具有较好的相关性。2014年和2015年高使用论文获得高引用,表明期刊可以利用论文发表2年内的使用次数预测其未来是否高被引;年代越久的高被引文献,也可能带来后续使用次数的二次提高。【结论】 论文使用次数与被引频次的相关性研究未能形成定论,时间跨度的选择可能是造成矛盾结果的主要原因。论文使用次数与被引频次的峰值出现时间不同,但二者呈正相关,使用次数可作为论文影响力早期评价的客观指标。  相似文献   

Examining the psychometric properties of the Infant–Toddler Environment Rating Scale-Revised Edition in a high-stakes context     

Rossana Bisceglia  Michal Perlman  Diana Schaack  Jennifer Jenkins 《Early childhood research quarterly》2009,24(2):121-132

The psychometric properties of the Infant–Toddler Environment Rating Scale-Revised Edition (ITERS-R) were examined using 153 classrooms from child-care centers where resources were tied to center performance. An exploratory factor analysis revealed that the scale measures one global aspect of quality. To decrease redundancy, subsets of items were selected randomly and by experts who rated items according to ease of administration and importance to quality. The shorter subsets demonstrated good discriminant validity, adequate to good psychometric properties, and high associations to the full ITERS-R score. They also demonstrated similar associations to staff education and staff-to-child ratio, as the full instrument. The best assessment of quality was demonstrated by the shortened subset that included items that assess both structural and process features of quality. Multilevel-analyses indicated that classrooms from the same providers score more similarly on ITERS-R than classrooms from other providers. The implications for using the ITERS-R in high-stakes contexts are discussed.  相似文献   

CiteScore、CiteScore百分位与常用期刊评价指标的相关性分析     

盛丽娜 《中国科技期刊研究》2018,29(6):605-611

【目的】 分析CiteScore、CiteScore百分位与常用期刊评价指标的相关性,评价其文献计量学特征,为指标的进一步应用提供参考。【方法】 以2016年数据为基础,在Scopus和Web of Science数据库共同拥有的学科中,考虑学科规模以及影响力的差异,选择4个学科的期刊为研究对象,分别在学科内分析CiteScore、CiteScore百分位与期刊常用文献计量学指标(SNIP、SJR、影响因子、特征因子、论文影响分值、影响因子百分位、标准特征因子、即年指标等)的相关性,在学科间分析CiteScore百分位与SNIP、影响因子百分位、标准特征因子的相关性。【结果】 在学科内,CiteScore、CiteScore百分位与上述指标均呈现显著正相关(P均小于0.05);在学科间,CiteScore百分位与影响因子百分位、SNIP、标准特征因子均呈现显著正相关(P均小于0.001)。【结论】 CiteScore可以和影响因子等文献计量学指标一样用于学术期刊的评价,CiteScore百分位也适用于期刊的跨学科评价。  相似文献   

海洋类中文科技期刊发展思考——以《海洋科学进展》为例     

李燕  胡筱敏  陈靖  王燕 《中国科技期刊研究》2018,29(1):79-83

【目的】 分析《海洋科学进展》和《海洋学报》的高被引论文,为《海洋科学进展》的发展和创新提供参考。【方法】 通过中国知网检索《海洋科学进展》和《海洋学报》的高被引论文,从被引频次、下载次数、论文类型、学科分布及第一作者等信息分析了两刊优势学科、高被引论文类型,并对两刊被引频次及下载次数进行相关性分析。【结果】 对两刊近10年被引频次排名前20论文的下载次数和被引频次进行了相关性分析,发现其相关系数均大于0.5;对两刊在网络盛行前后各5年被引频次排名前50论文的被引频次及下载次数进行相关性分析,发现网络发展使得其相关性均有下降趋势。【结论】 网络发展加剧了期刊间的竞争,期刊的数字化建设不容忽视。在日趋平等、便利的网络平台上,准确的期刊定位和具有原创性观点的高质量论文仍是科技期刊发展的根本。  相似文献   

Statistical analyses in the physiology of exercise and kinanthropometry     

E.M. Winter  R.G. Eston  K.L. Lamb 《Journal of sports sciences》2013,31(10):761-775

Research into the physiology of exercise and kinanthropometry is intended to improve our understanding of how the body responds and adapts to exercise. If such studies are to be meaningful, they have to be well designed and analysed. Advances in personal computing have made available statistical analyses that were previously the preserve of elaborate mainframe systems and have increased opportunities for investigation. However, the ease with which analyses can be performed can mask underlying philosophical and epistemological shortcomings. The aim of this review is to examine the use of four techniques that are especially relevant to physiological studies: (1) bivariate correlation and linear and non-linear regression, (2) multiple regression, (3) repeated-measures analysis of variance and (4) multi-level modelling. The importance of adhering to underlying statistical assumptions is emphasized and ways to accommodate violations of these assumptions are identified.  相似文献