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1.
The aim of this article is to consider models incorporating principal components from the perspective of structural equation modeling. These models include the principal component analysis of patterned matrices, multiple analysis of variance based on principal components, and multigroup principal component analysis. We demonstrate that these models can be fit readily using the programs LISREL 8 and Mx. The models and certain extensions are discussed, and several illustrations are given. 相似文献
2.
Che Kan Leong 《Reading and writing》1992,4(4):327-364
The longitudinal project attempts to estimate the parameters of a priori postulates with their measurement errors, and the goodness-of-fit of model-implied population covariance sigma matrices with observed sample covariance matrices, using linear structural equation modelling (LISREL). The present report deals with Phase 2 of the project (see Leong 1988 for Phase 1 results) and involved 252 ten-to twelve-year-old readers. Three latent exogenous components were postulated: (a) orthographic/phonological component, (b) morphological component, and (c) sentence comprehension component. These constructs were subserved by 8 measurable indicators (5 lexical decision and 3 vocalization tasks). These 8 independent tasks were all administered on-line via the microcomputer under laboratory conditions with combined, scaled accuracy and latency measures as indices of efficiency in processing the reading related tasks. The latent endogenous or dependent component Reading Performance was subserved by standardized vocabulary and reading comprehension tests. Maximum likelihood analyses using LISREL VI to test the approximation of the hypothesized model show a good fit for the grade 4 data, a reasonable fit for grade 5, and a less unambiguous fit for grade 6. These results are generally confirmed with the simultaneous structural analyses of Phase 2 and Phase 1 (N=298 students) multisamples. Multi-components and multi-levels of reading for these age groups are emphasized. 相似文献
3.
Stephen M. Nettles Yaacov Petscher 《Journal of Personnel Evaluation in Education》2007,20(3-4):247-259
Measurement of principal implementation behaviors has proved difficult to researchers in educational leadership due to a lack
of consensus on the operational definitions of leadership constructs. The Principal Implementation Questionnaire (PIQ) was
developed and validated with the intention of providing clarity in the assessment of principal leadership behaviors in the
implementation of effective reading programs. Constructs were operationally defined within the context of the population of
interest, with subsequent item writing centered around the constructs. A resulting calibration sample of principals from Florida
Reading First schools was used to test the hypothesized measurement model to determine how well the items were described by the proposed
factors. Results from LISREL analyses revealed a well-fitted model, based on numerous fit indices. 相似文献
4.
高采文 《雁北师范学院学报》2006,22(2):63-65
本文运用SAS软件系统中的主成分分析、聚类分析两种统计方法对我国31个地区2003年的废水排放及处理情况进行了分析,提供了我国废水处理横向比较的分析报告． 相似文献
5.
Parviz Chahbazi 《Journal of Experimental Education》2013,81(2):135-142
Relations among achievement, self-concept, and motivation in mathematics and language arts were examined in a longitudinal 2-wave, 3-variable panel study. The participants were 3 cohorts of Norwegian elementary and middle school students (N = 1,005). The 1st data collection took place in October and November 1996, when the students in the 3 cohorts attended 3rd, 6th, and 8th grades. The 2nd data collection took place 1 academic year later. LISREL 8 was used in the separate analyses of mathematics and language arts data; the data were analyzed for each cohort by means of 6 path analyses for latent variables. In all cohorts, the results were consistent with a skill-development model of the achievement-self-concept relation, that is, the view that achievement affects subsequent self-concept. No evidence was found that self-concept affects subsequent achievement (self-enhancement model). Moreover, in the 2 oldest cohorts, motivation was affected by previous achievement. However, there was no evidence that self-concept affects subsequent motivation or achievement. Expectations of a developmental change in the achievement-self-concept relation was not supported. 相似文献
6.
针对《多元统计分析》这门课程中主成分分析的教学目标、教学重点及难点,采用案例教学法,结合当地的实际,利用主成分分析对湘西土家族苗族自治州八县市农村居民人均消费水平进行综合排名。通过这个案例让学生掌握主成分分析这个方法、激发学生的学习兴趣和参与的积极性,提高学生掌握理论知识并运用知识解决实际问题的能力。 相似文献
7.
Che Kan Leong 《Annals of dyslexia》1988,38(1):95-119
The present study is predicated on the logic of interrelated functional information processing components as an approach to
understanding reading and its difficulties in preadolescent readers. The structural equation modelling (and its variants)
involved these three latent components: (a) orthographic/phonological component, (b) morphological component, and (c) sentence
and paragraph comprehension component. These components were subserved by a total of ten measurable tasks, all administered
on-line via the microcomputer under laboratory conditions with reaction time measures as indices of mental representation
of word knowledge and sentence/paragraph comprehension. The latent dependent component of reading performance was subserved
by standardized vocabulary and reading comprehension tests. The total sample consisted of 298 children in grades, 4, 5, and
6. Maximum likelihood analyses using LISREL show that the data in general do not disconfirm the proposed model for grade 4
readers. The three-component model, with some variables set free, provides a reasonable fit for the grade 5 data but less
claim could be made about the goodness of fit for grade 6. The results show the mutually reinforcing and mutually facilitating
effects of multilevels and multicomponents of reading. Word structure and word knowledge are particularly predictive of reading.
The present Phase 1 work would be validated in a follow-up of another cohort of readers and would also lead to the systematic
training of some of the components with poor readers.
This study was supported by a grant (No. 410-86-0048) from the Social Sciences and Humanities Research Council of Canada. 相似文献
8.
Che Kan Leong 《International Journal of Disability, Development & Education》1974,21(2):100-113
A factorial study of the revised Illinois Test of Psycholinguistic Abilities was carried out with 98 moderately mentally retarded school children to determine the domain mapped by the subtests and whether these fit the theoretical psycholinguistic model of channels, processes and levels of communication. Raw scores from the 10 subtests together with Binet IQ were subjected to three methods of analysis: the alpha factor analysis, image analysis and principal component analysis to obtain “method independent” and more meaningful results. Factor loadings from the alpha factor and image analyses were tested for congruence by the Schonemann method and a factor “reliability” study was carried out with separate principal component analyses on two random subsamples of 49 children each. Results support the channel separation postulated by the theoretical model. Implications for language programming for the moderately mentally retarded are discussed. The need for a taxonomic study of psycholinguistic abilities of retarded and non‐retarded children within the framework of current views of developmental psycholinguistics is stressed.
9.
利Microsoft Visual J＋＋6．0作为实验开发平台,采用Java语言及Applet嵌入网页技术,实现基于互联网上主成分分析过程的可视化,用户可通过实例演示该实验设计的各功能：用户对相关原理的学习,数据的录入、修改,显示主成分个数及相应的累计贡献率. 相似文献
10.
以贵州省2011年各地区人均地方财政支出数据为基础,采用主成分聚类分析方法,分析各个地区地方财政支出能力,并按人均财政支出水平的高低对区域进行分类,从而反映各地居民享受公共服务的差异,得出贵州省各地区人均财政支出水平存在较大差距的结论,对存在的财政收入和支出不平衡问题提出相应的对策建议. 相似文献
11.
Richard M. Smith 《Structural equation modeling》2013,20(1):25-40
This study compares the Rasch item fit approach for detecting multidimensionality in response data with principal component analysis without rotation using simulated data. The data in this study were simulated to represent varying degrees of multidimensionality and varying proportions of items representing each dimension. Because the requirement of unidimensionality is necessary to preserve the desirable measurement properties of Rasch models, useful ways of testing this requirement must be developed. The results of the analyses indicate that both the principal component approach and the Rasch item fit approach work in a variety of multidimensional data structures. However, each technique is unable to detect multidimensionality in certain combinations of the level of correlation between the two variables and the proportion of items loading on the two factors. In cases where the intention is to create a unidimensional structure, one would expect few items to load on the second factor and the correlation between the factors to be high. The Rasch item fit approach detects dimensionality more accurately in these situations. 相似文献
12.
结构方程模型(SEM)的原理及操作 总被引：10，自引：0，他引：10
孙连荣 《宁波大学学报(教育科学版)》2005,27(2):31-34,43
结构方程模型(SEM)是应用线性方程系统表示观测变量与潜在变量之间及潜在变量之间关系的一种统计方法。当前，SEM及相应的LISREL软件已成为心理学等社会学科中广泛应用的一种分析思想和技术。文章简要介绍了SEM的特点、原理及LISREL的操作方法。 相似文献
13.
教师教学能力评价指标体系的建立——基于高师微格课程效能评价的研究 总被引：1，自引：0，他引：1
在回顾国内外课程效能评价研究文献的基础上,对教学能力进行了理论分析,揭示了教师教学能力评价的涵义。根据调查统计数据,运用单一样本T检验、聚类分析和主成分因子分析的方法,构建了教师教学能力评价指标体系。该评价体系由语言能力、操作能力、监控能力及设计能力4个维度和36个评价指标构成。 相似文献
14.
15.
We present a LISREL model for the estimation of the repeated measures analysis of variance (ANOVA) with a patterned covariance matrix. We demonstrate this model for a 5 x 2 (Time x Group) ANOVA in which the data are assumed to be serially correlated. The residuals are assumed to have been generated according to an AR(1) process. An appropriate covariance structure is selected, tested, and compared with alternative patterns. Similarities between the LISREL model and SAS PROC MIXED are discussed. 相似文献
16.
高等职业院校办学规模与综合效益之间的关系,越来越受到教育主管部门和院校的关注。根据江苏省高职院校规模效益研究中投入产出主成分分析、主成分回归分析、主成分数据包络分析的结果,对高职教育办学规模与办学效益、经费投入与办学质量以及如何实现科学发展展开分析,并提出相应的发展对策。 相似文献
17.
Foong Yoke Yeen 《Asia Pacific Journal of Education》1994,14(1):46-54
This study investigated the relationships of attitudes towards science with perception of the science teacher, home support and science achievement among a sample of Secondary Two (8th Grade) students. Using the full LISREL model, it was found that the perception of the science teacher was the most significant factor in the development of positive attitudes towards science. Achievement in science was also a significant factor for both girls and boys. Home support was, however, a significant factor for girls but not for boys. 相似文献
18.
大学生成绩的综合评价及分析 总被引：2，自引：0，他引：2
本文运用主成分分析对大学生四年的学习成绩进行综合评价,并对主成分得分进行单因素方差分析,以期更好地对大学生的学习成绩进行综合评价。 相似文献
19.
对设计阵X呈病态的线性回归模型,提出回归系数有偏估计的一种广义岭型主成分估计.均方误差意义下,在一定条件下它优于岭型主成分估计、Stein型主成分估计.证明了它的可容许性和较强的抗干扰性以及Pit-man准则下的优良性. 相似文献
20.
Latent curve models offer a flexible approach to the study of longitudinal data when the form of change in a response is nonlinear. This article considers such models that are conditionally linear with regard to the random coefficients at the 2nd level. This framework allows fixed parameters to enter a model linearly or nonlinearly, and random coefficients at the 2nd level may only enter linearly. Beginning with LISREL 8.80 for Windows, such models can be fitted, giving users greater flexibility in model specification. An example with LISREL syntax is provided. 相似文献