Student contribution in asynchronous online discussion: a review of the research and empirical exploration   总被引：1，自引：0，他引：1  

Khe Foon Hew  Wing Sum Cheung  Connie Siew Ling Ng 《Instructional Science》2010,38(6):571-606

The increasingly prevalent use of Internet in schools and homes has resulted in asynchronous online discussion becoming an increasingly common means to facilitate dialogue between instructors and students, as well as students and students beyond the boundaries of their physical classrooms. This article is organized into two main sections. In the first section, we review 50 empirical studies in order to identify the factors leading to limited student contribution. Limited student contribution is defined as students making few or no postings, or students exhibiting surface-level thinking or low-level knowledge construction in online discussions. We then identify the various empirically based guidelines to address the factors. In the second section, we discuss three potential guideline dilemmas that educators may encounter: (a) use of grades, (b) use of number of posting guideline, and (c) instructor-facilitation. These are guidelines where previous empirical research shows mixed results when they are implemented. Acknowledging the dilemmas is essential for educators and researchers to make informed decisions about the discussion guidelines they are considering implementing. Finally, we report two exploratory case studies on student-facilitation that we conducted. Using students as facilitators may be an alternative solution to educators who wish to avoid the instructor-facilitation guideline dilemma.  相似文献   

School experience influences on pre-service teachers' evolving beliefs about effective teaching   总被引：1，自引：0，他引：1  

Wan Ng  Howard Nicholas  Alan Williams 《Teaching and Teacher Education》2010

This study systematically tracked a group of 37 pre-service teachers' evolving beliefs about and perceptions of themselves and their experiences from the initial data collection prior to any experiential base in schools through the varied phases of their professional placements involving steadily increasing levels of professional responsibility. The results indicated that the pre-service teachers' beliefs about good teaching evolved from a belief in being in control through expertise to a belief in being in control through charisma and building relationship with their students. The first teaching practicum experience dramatically challenged the beliefs of these students where the beliefs indicated immediately after the experience to be more focussed on ‘self’ rather than students. Subsequent belief structures differed in character from both those after the first teaching experience and from those held prior to the first teaching responsibility. The study also reports on the pre-service students' self-efficacy beliefs in good teaching. Gender differences are also discussed.  相似文献   

香港科技大学土工离心机先进模拟技术在岩土工程中的应用(英文)   总被引：3，自引：0，他引：3  

Charles W.W.NG 《浙江大学学报(A卷英文版)》2014,15(1):1-21

研究目的:采用香港科技大学的先进土工离心模拟技术来研究和解决复杂的岩土工程问题。创新要点:1.验证竖向钻孔开挖技术(应力释放)对建筑纠偏的有效性;2.研究隧道坍塌对其邻近既有隧道的影响;3.研究基坑开挖对坑中既有桩基承载力的影响;4.揭示不同颗粒级配形成的土坡在水位上升和动力荷载作用下的破坏模式。研究方法:1.用香港科技大学全球首台离心机中的双向震动台(见图5)模拟地震荷载对土坡的影响;2.用香港科技大学全球第二台四轴机械手(见图6)模拟不停机情况下的钻孔开挖。重要结论:1.竖向钻孔开挖技术能有效地对建筑物进行纠偏;2.隧道坍塌会对其邻近既有隧道产生很大的附加弯矩,尤其是拱脚处的弯矩可增加多达228%;3.基坑开挖后坑中桩基的承载力取决于桩土接触面的粗糙程度,粗糙的桩-土接触面在剪切过程中倾向于发生剪胀,这会增大桩周围土的水平土压力,从而使桩基承载力增加;4.当水位上升时,颗粒均匀,级配差的松散砂土坡容易发生静态液化;相反地,颗粒级配好的松散砂土坡(风化土)不太可能发生静态液化,而只是发生整体滑动破坏;5.离心机双向震动台实验显示松散的风化岩土坡在0.3g的地震加速度作用下不会发生液化,可以抵御香港地区的地震荷载(0.08g到0.11g)。  相似文献   

Providing Readable Readers for Children in the Lower Primary School     

Ng Seok Mot 《Asia Pacific Journal of Education》1984,6(1):7-13

Even a proficient mature reader occasionally has problems with reading. Try reading this sentence.

“that that is is not that that is not is that it is” Even when appropriate punctuation is provided to facilitate the apprehension of the linguistic structure of this sentence, its meaning is not easily evident.  相似文献   

Note from the Executive Editor     

Pak Tee Ng 《Educational Research for Policy and Practice》2014,13(1):1-1

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Effects of motion control footwear on running: a systematic review     

Cheung RT  Wong MY  Ng GY 《Journal of sports sciences》2011,29(12):1311-1319

Excessive foot pronation is a risk factor of running injuries and motion control footwear is designed to control foot pronation. With the movement transfer between foot pronation and tibial rotation, motion control footwear may not only be confined to controlling foot pronation. In view of the controversies in the literature on effectiveness of motion control footwear, this paper reviewed the efficacy of motion control footwear functions as reported in the literature. Eligible studies were identified from seven electronic databases. Two independent authors extracted the data and assessed the methodological qualities using the Jadad Scale. A total of 14 quasi randomised controlled trials were included. Even though the included studies were rated as "low quality" according to the Jadad Scale, the data were pooled and analysed. Results revealed that motion control footwear was effective in reducing the amount of foot pronation and the peak vertical impact during landing. There is no evidence that suggests motion control footwear for controlling kinematics of the proximal segments.  相似文献   

Book Review     

Ng Pak Tee 《Asia Pacific Journal of Education》2004,24(2):225-227

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Cultivating revolutionary successors in the Chinese communes through open‐door education     

Pedro Pak‐Tao Ng 《Cambridge Journal of Education》1979,9(1):23-35

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网络教学平台使用的师资培训——香港理工大学的经验   总被引：3，自引：0，他引：3  

吴廷坚 《远程教育杂志》2007,(4)

面授和网上教学有机结合的整合式教学越来越成为高校教育和培训的主要模式.本文旨在介绍和分析香港理工大学教学发展中心(简称EDC)如何通过网上教学平台的功能,与面授教学结合起来,发挥面授教学和网上教学的各自优势,使教师培训更加有效.EDC的实践表明,在大学教师培训课程中,发挥网上教学的优势,能帮助学员弥补由于有限的面授教学产生的师生之间、学员和学员之间互动的不足.在网上学习中,通过互相的学习观摩和观念碰撞,能激发学员的学习兴趣,有效地促进学员之间进行探究性学习,同时,这种集体学习的方法,能促进在职教师之间的友好交往和学术交流.  相似文献   

Economic development, human capital, and gender earnings differentials in China   总被引：2，自引：0，他引：2  

Ying Chu Ng   《Economics of Education Review》2004,23(6):587

Gender earnings differentials in China during the course of development in the post-reform period were examined. The analysis showed that the female–male earnings ratio increased over time in all regions. The region with relatively rapid economic reforms had the highest female–male earnings ratio. Decomposition of the gender earnings differential revealed that in the more developed region a lower percentage of the differential could be explained by gender differences in productive characteristics. Changes in the discriminatory component of the differential by region over time suggested that both the “competition” effect proposed by Becker [The Economics of Discrimination, 1971] and the effects of wage decentralization during economic reforms played a different role in the eastern and central regions versus their role in the western region. Further examination of the sub-components of the explained component of the differential highlighted the minor role of education in explaining the gender earnings differentials.  相似文献