Statistical Power of the Multiple Domain Latent Growth Model for Detecting Group Differences

The latent growth model (LGM) in structural equation modeling (SEM) may be extended to allow for the modeling of associations among multiple latent growth trajectories, resulting in a multiple domain latent growth model (MDLGM). While the MDLGM is conceived as a more powerful multivariate analysis technique, the examination of its methodological performance is very limited. Hence, the present study compared the power of the MDLGM with that of a set of univariate LGMs for detecting group differences in growth rates over time using a Monte Carlo study with a two-group and two-domain design. The results indicated that there were different scenarios where the power rates for the MDLGM were greater than that of the set of LGMs (and vice versa) due to a joint function of the two domains’ intercorrelation size and the group difference effect size.     

开放型问题的解法

开放型问题有利于培养学生的思维能力和创新能力,作者就三种类型的开放型问题作简单归纳。     

Strategy use,listening problems,and motivation of high- and low-proficiency Chinese listeners

Building on previous listening strategy research, the author aimed to explore the differences between Chinese high-proficiency listeners (HLs) and low-proficiency listeners (LLs) on their strategy use, problems, and motivation in native language (L1) listening. It involved 1,290 Grade 7 and 1,515 Grade 9 students. Both quantitative and qualitative methods, including a listening comprehension test, questionnaires, and interviews, were adopted. The findings indicated that HLs possessed more types of strategies and used strategies more frequently and effectively than LLs. HLs not only reported fewer listening problems but also had a better awareness of listening problems and use of problem-solving strategies than LLs. Both HLs and LLs agreed with the importance of listening but showed little interest in doing listening tasks. The similarities and differences between the findings of this study and those of second-language listening research and implications for planning effective instruction to enhance native language listening proficiency are discussed.     

中外合作办学实践中的法律问题及法律建议

中外合作办学是我国教育体制改革中出现的新的办学形式。从北京地区的情况看 ,中外合作办学尽管发展迅速 ,但仍存在许多涉及办学目的、学历、税、外汇及办学主体法律地位等方面的法律问题。本文在分析这些问题的基础上 ,提出了完善我国中外合作办学法律制度的法律建议     

中小学"数学情境与提出问题"教学探析

中小学“ 情境—问题” 数学教学研究是基于国际、国内数学教育改革大趋势而开展的一项前沿性、探索性与实证性的数学教学研究.它所提倡的课堂教学观有:(1)以人为本,以学生为中心;(2)关注学生的学习过程;(3)发展共性与突出个性.“ 情境—问题” 数学教学实验研究还应在以下 3 方面做出努力:(1)实验研究范围需进一步扩大;(2)将“ 情境—问题” 数学教学的基本理念向其它学科渗透;(3)进一步提升理论研究水平.     

中小学信息技术教育发展中的几个问题及思考

中小学校信息技术教育在取得辉煌成绩的同时，也存在着一些不容忽视的问题。本文分析了中小学教育技术的现状并由此引发了一系列思考，期望寻求解决途径，使其健康发展。     

汉族与撒拉族初中学生数学应用题解决特点的比较研究

汉族与撒拉族初中学生数学应用题解决的特点为:1 数学应用题解决具有跨文化性,但汉族与撒拉族在不同阶段各有优势;2 初中学生数学问题解决中的常见错误是关系感知错误、图式错误和计算错误,最常见的是关系感知错误,而撒拉族学生的图式错误较为严重,汉族学生的计算错误高于撒拉族学生;3 语言可能是影响民族学生数学应用题解决的重要因素。     

关于导数在解题中的应用

对于某些较难的数学问题,运用导数解题能使操作简便,且能揭示习题的内涵,从而获得化繁为简的特殊功效。     

农业和农村经济结构战略性调整与农民增收

对农业和农村经济结构的战略性调整，是促进农村经济发展、增加农民收入、提高经济增长质量和效益的根本性措施。在调整过程中要走好发展乡镇企业、加快小城镇建设和农业产业化经营几步棋。要调整乡镇企业产业结构。小城镇建设应因地制宜，东部重点可放在建设农村工业小区和发展农村小城镇上，中西部地区宜重点建设县级以上城市和区位优势明显的建制镇。     

农村精神文明建设现状分析与对策

新时期农村精神明建设出现下滑的趋势，部分农民理想信念淡化，封建迷信沉渣泛起社会治安形势恶化，铺张浪费现象严重。这种局面的形成除了部分领导认识不到位，抓得不力外，也与近年精神明建设投入严重不足及不良的社会大环境有关。因此，解决这些问题，一要提高认识，二要讲求实效，三要加大投