多级评分的认知诊断计算机化适应测验

本文在0-1评分的CD-CAT基础上, 拓展出了适合多级评分CD-CAT (psCD-CAT)的认知诊断模型及选题策略, 为实现多级评分CD-CAT提供了方法支持。Monte Carlo模拟实验结果表明：本文拓展的多级评分CD-CAT具有较理想的属性诊断正确率及测验效率和题库安全性, 可以用于多级评分数据的CD-CAT; 模拟实验还表明, 整体来看PS-PWKL和PS-HKL两种选题策略具有较高属性判准率、题库安全性和高测验效率, 且均优于PS-KL选题策略。总之, 本研究对于进一步拓展CD-CAT在实践中的应用提供了认知诊断模型与选题策略等。     

童年中晚期孤独感的发展轨迹：一项潜变量增长模型分析

使用问卷法和同伴提名法对884名小学二年级学生进行历时三年的四次追踪测试, 采用潜变量增长模型建模, 检验小学2~5年级学生孤独感的变化趋势, 并考察不同性别儿童孤独感变化的差异性以及同伴接纳对孤独感变化的影响。结果发现：(1) 2~5年级小学生孤独感呈曲线递减趋势, 递减速度逐渐减缓, 起始水平及发展速度均存在显著的个体差异; (2)女孩起始的孤独感水平显著低于男孩, 而发展速度、加速度则不存在显著的性别差异; (3)较高的同伴接纳对当时儿童孤独感的降低具有显著的促进作用。研究采用孤独感发展的情境观, 并结合儿童认知、自我发展的特点对结果进行了分析。     

卫生事业管理专业研究生培养方案探讨

研究生培养方案是研究生培养的规范性文件,对于保证研究生培养质量具有关键的作用.随着社会的发展,培养方案应该及时修订和更新.对美国大学卫生事业管理专业研究生培养计划与国内该专业研究生培养方案进行了对比研究,结果将为进一步修改我国该专业培养方案修订提供借鉴.     

产前超声检查的医学伦理学思考

产前超声检查是指在妊娠期间应用超声检查技术检测母体内胎儿是否存在先天性缺陷和遗传性疾病,随着超声技术的迅速普及和发展,产前超声检查已成为产前诊断的不可缺少的有效手段之一.本文从医学与哲学的角度对产前超声检查的必要性、安全性、局限性以及相关医学伦理问题,如知情同意权、隐私权及人工流产等进行综合分析.     

脑动静脉畸形的诊治方法探讨

结合最新文献和实践经验,用科学、辩证的观点分析脑动静脉畸形的自然史、诊断和治疗选择.就显微手术、血管内治疗及放射外科治疗三种手段的选择进行探讨.     

论王宗传的易学观

王宗传作为南宋以心解《易》的开启者之一,继承义理派传统,提出理乃所以为象者、数生于理、理寓于数、《易》乃假蓍龟之神发明人心之神等观念。体现了他重义理而不废象数的易学观。其易学观体现了当时儒者传承华夏文明正统的学术旨归。     

帛书《二三子问》“龙之德”之意蕴及忧患意识

帛书《二三子问》作为解经之作,其论述是依《易》之经文展开的。《二三子问》论《易》屡称"龙德",分别从龙与天地阴阳的关系,龙的变化特性,龙之德在人类社会中的体现三个方面进行论证,表达作者的易学观。在此基础上,《二三子问》的作者通过对卦爻辞的诠释,以阐述施政艰难的方式表达忧患意识,同时通过比较人君、贤者、君子、小人的不同德行,表达重德的核心观念,凸显忧患意识。     

Latent Class Dynamic Mediation Model with Application to Smoking Cessation Data

Traditional mediation analysis assumes that a study population is homogeneous and the mediation effect is constant over time, which may not hold in some applications. Motivated by smoking cessation data, we propose a latent class dynamic mediation model that explicitly accounts for the fact that the study population may consist of different subgroups and the mediation effect may vary over time. We use a proportional odds model to accommodate the subject heterogeneities and identify latent subgroups. Conditional on the subgroups, we employ a Bayesian hierarchical nonparametric time-varying coefficient model to capture the time-varying mediation process, while allowing each subgroup to have its individual dynamic mediation process. A simulation study shows that the proposed method has good performance in estimating the mediation effect. We illustrate the proposed methodology by applying it to analyze smoking cessation data.

     

Employee-experienced High-performance Work Systems in Facilitating Employee Helping and Voice: The Role of Employees’ Proximal Perceptions and Trust in the Supervisor

Relative to previous research concerning the positive association between high-performance work systems (HPWS) and employees’ voice and helping, we examined a wider range of mediators reflecting employees’ ability, motivation, and opportunity to expand their citizenship-based role definitions. Trust in the supervisor was also investigated as a boundary condition on the relationships in question. Multisource data, collected in 4 waves, from 208 supervisor–employee dyads showed that employees’ efficacy, instrumentality, and autonomy perceptions concerning voice mediated the association between employee-experienced HPWS and expanded role definition for voice. Instrumentality mediated the relationship between employee-experienced HPWS and expanded role definition for helping. The positive links between employee-experienced HPWS and both supervisor-rated helping and voice were mediated by employees’ role definitions. Trust in the supervisor positively moderated the mediated effects.     

政德——政权兴亡的生命线

中国自古就存在政治伦理 ,即“政德”。汉初的思想家们更加重视“政德” ,将其视为一切政权的生命线。