盐酸戊乙奎醚对心脏瓣膜置换术患者NF-κB表达的影响

为研究盐酸戊乙奎醚对心脏瓣膜置换术患者心肌NF-κB转录活性的影响,选取择期瓣膜置换术患者60例,随机分为对照组（C）、盐酸戊乙奎醚组1（P1）、盐酸戊乙奎醚组2（P2）,每组20例。结果心肌缺血再灌注后,P1、P2组NF-κB的转录活性明显下降,可见盐酸戊乙奎醚可以抑制心肌NF-κB的激活,在一定程度上具有心肌保护作用。     

A Limited Information Estimator for Dynamic Factor Models

Structural equation modeling (SEM) is an increasingly popular method for examining multivariate time series data. As in cross-sectional data analysis, structural misspecification of time series models is inevitable, and further complicated by the fact that errors occur in both the time series and measurement components of the model. In this article, we introduce a new limited information estimator and local fit diagnostic for dynamic factor models within the SEM framework. We demonstrate the implementation of this estimator and examine its performance under both correct and incorrect model specifications via a small simulation study. The estimates from this estimator are compared to those from the most common system-wide estimators and are found to be more robust to the structural misspecifications considered.     

基于多层验证性因素分析的各种信度系数方法

近年来,心理学研究的复现性受到广泛关注,许多实证研究难以重复验证,信度较低。大量研究使用多层技术,但只报告整体信度,导致研究可重复危机。基于各种信度系数和验证性因素分析的理论,以二层模型为例,总结多层信度计算方法,通过文献综述检索应用情况,并用MPLUS进行实例演示,最后讨论单层信度估计存在的偏差及分层估计的好处。总之,对多层数据进行分层信度估计是很有必要的,可消除因测量工具缺乏信度而导致的研究不可重复。     

Utility of the REDFLAGS Model for Supporting Community College Students’ Mental Health: Implications for Counselors

The counseling literature is lacking in research on supporting the mental health needs of the growing community college student population. A number of past investigators have demonstrated the utility of mental health literacy for supporting college students’ mental health on 4‐year universities. The present researchers examined the validity of the REDFLAGS model (a theoretical model for promoting mental health literacy) with a national stratified random sample (N = 640, stratified by age, gender, and ethnicity) of community college students. Collectively, the results of the confirmatory factor analysis, hierarchical logistic regression, and factorial analysis of variance supported the use of the model with community college students. Implications for enhancing counseling practice as well as directions for future research are provided.     

初级指挥官人格类型与PM领导行为类型有效性的关系

通过对陆军初级指挥官人格心理类型与领导行为有效性的心理学研究 ,探讨个人的领导潜能、人格心理类型对领导行为有效性的影响。研究发现 :1方差分析表明 ,具有不同领导行为的指挥官在人格维度上存在明显的统计学差异。提示了指挥官的领导行为取向与人格因素有密切的关系。2卡方分析结果也表明 ,PM型行为的军官在其人格特征上具有“ESTJ”组合特征 ,而 pm型的军官则正好相反 ;另外 ,pm型的军官在成就动机上获得高分的人数最少。3系统聚类分析显示 ,“成就动机”、“感觉”和“判断”三种人格因素与军事指挥官完成整体领导职能有着更为密切的关系。     

The effect of additional variables on factor indeterminacy in models with a single common factor

Determinate solutions for the indeterminate common factor ofp variables satisfying the single common factor model are not unique. Therefore an infinite sequence of additional variables that conform jointly with the originalp variables to the original single common factor model does not determine a unique solution for the indeterminate factor of thep variables (although the solution is unique for the factor of the infinite sequence). Other infinite sequences may be found to determine different solutions for the factor of the originalp variables. The paper discusses a number of theorems about the effects of additional variables on factor indeterminacy in a model with a single common factor and draws conclusions from them for factor theory in general.     

Beyond principal component analysis: A trilinear decomposition model and least squares estimation

The paper derives sufficient conditions for the consistency and asymptotic normality of the least squares estimator of a trilinear decomposition model for multiway data analysis.     

Continuous and discrete latent structure models for item response data

Relations are examined between latent trait and latent class models for item response data. Conditions are given for the two-latent class and two-parameter normal ogive models to agree, and relations between their item parameters are presented. Generalizationss are then made to continuous models with more than one latent trait and discrete models with more than two latent classes, and methods are presented for relating latent class models to factor models for dichotomized variables. Results are illustrated using data from the Law School Admission Test, previously analyzed by several authors.     

阅读保持的类比结构映射效应研究

探讨文章阅读过程中类比结构映射效应与共同元素效应对阅读信息保持的迁移作用,包括两个实验,实验Ｉ探讨前阅读的源文章与目标文章在结构上与命题上的共同性对目标文章信息保持的迁移效果,结果表明,前后阅读文献的结构共同目标文章的保持有显著的促进作用,命题共同的促进作用不显著,实验２进一步探讨在源文章与目标文章结构或命题有共同性的情况下,提示与否对目标文章的信息保持效果的影响作用,结果证明,有两种情况下,提示     

从EDRF的发现来看科学研究中的偶然性和必然性

本文通过讲述血管内皮舒张因子(endothelium-derived relaxing factor,EDRF)发现过程中的一些事例,讨论科学研究中的偶然性与必然性之间的辩证关系。把握偶然性和必然性之间的对立统一关系,有助于深化对自然和社会规律的认识。科研工作者应运用辩证唯物主义的观点,重视偶然现象,探索必然规律。