Promoting self-regulated learning through portfolio assessment: testimony and recommendations     

Ricky Lam 《Assessment & Evaluation in Higher Education》2014,39(6):699-714

Portfolio assessment (PA) has been extensively adopted for writing development in the past three decades. Much research on PA primarily investigates students’ and teachers’ perceptions of its benefits, and how it influences students’ motivation and general writing abilities. Despite its purported effectiveness, not much has been done to understand the relationship between PA and self-regulated learning (SRL) especially in English as a Foreign Language (EFL) or English as a Second Language (ESL) writing research. This paper contends that PA can productively foster SRL in EFL writing classrooms, and, more specifically, it develops a conceptual model of SRL within the context of writing portfolios and iterative feedback processes. Supporting evidence emphasising how PA can facilitate SRL is discussed and evaluated. The paper ends with six recommendations and implications proposing how SRL can be promulgated in EFL portfolio-based contexts. Finally, possible future research is suggested.  相似文献   

The relationship between civic attitudes and voting intention: an analysis of vocational upper secondary schools in England and Singapore     

Christine Han  Bryony Hoskins  Jasmine Boon-Yee Sim 《Compare》2014,44(5):801-825

From 2009 to 2011, a team from the Centre for Learning and Life Chances in Knowledge Economies and Societies carried out a mixed-methods study of young people in England and Singapore. With regard to civic attitudes, the study showed that there was a greater sense of political self-efficacy and collective (school) efficacy in Singapore than in England. In addition, the group in Singapore scored higher on future voting relative to the group in England. Further, while both political self-efficacy and collective (school) efficacy were correlated with future voting in England, only the latter was correlated in the case of Singapore. For some, the results may seem counter-intuitive. The article reflects on these results, particularly those relating to democratic outcomes.  相似文献   

Reachable set estimation and controller design for distributed delay systems with bounded disturbances     

Baoyong Zhang  James Lam  Shengyuan Xu 《Journal of The Franklin Institute》2014

This paper is concerned with the problems of reachable set estimation and state-feedback controller design for linear systems with distributed delays and bounded disturbance inputs. The disturbance inputs are assumed to be either unit-energy bounded or unit-peak bounded. First, based on the Lyapunov–Krasovskii functional approach and the delay-partitioning technique, delay-dependent conditions for estimating the reachable set of the considered system are derived. These conditions guarantee the existence of an ellipsoid that contains the system state under zero initial conditions. Second, the reachable set estimation is taken into account in the controller design. Here, the purpose is to determine an ellipsoid and find a state-feedback controller such that the determined ellipsoid contains the reachable set of the resulting closed-loop system. Sufficient conditions for the solvability of the control synthesis problem are obtained. Based on these results, the problem of how to design a controller such that the state of the resulting closed-loop system is contained in a prescribed ellipsoid is studied. Finally, numerical examples and simulation results are provided to show the effectiveness of the proposed analysis and design methods.  相似文献   

Simplified prototyping of perfusable polystyrene microfluidics     

Reginald Tran  Byungwook Ahn  David R. Myers  Yongzhi Qiu  Yumiko Sakurai  Robert Moot  Emma Mihevc  H. Trent Spencer  Christopher Doering  Wilbur A. Lam 《Biomicrofluidics》2014,8(4)

Cell culture in microfluidic systems has primarily been conducted in devices comprised of polydimethylsiloxane (PDMS) or other elastomers. As polystyrene (PS) is the most characterized and commonly used substrate material for cell culture, microfluidic cell culture would ideally be conducted in PS-based microsystems that also enable tight control of perfusion and hydrodynamic conditions, which are especially important for culture of vascular cell types. Here, we report a simple method to prototype perfusable PS microfluidics for endothelial cell culture under flow that can be fabricated using standard lithography and wet laboratory equipment to enable stable perfusion at shear stresses up to 300 dyn/cm² and pumping pressures up to 26 kPa for at least 100 h. This technique can also be extended to fabricate perfusable hybrid PS-PDMS microfluidics of which one application is for increased efficiency of viral transduction in non-adherent suspension cells by leveraging the high surface area to volume ratio of microfluidics and adhesion molecules that are optimized for PS substrates. These biologically compatible microfluidic devices can be made more accessible to biological-based laboratories through the outsourcing of lithography to various available microfluidic foundries.  相似文献   

Preparation for Future Collaboration: Cognitively Preparing for Learning From Collaboration     

Rachel Lam  Manu Kapur 《Journal of Experimental Education》2013,81(4):546-559

In a study investigating different ways to engage students in an individual preparation activity, we assessed learning from collaboration with a peer. Learning was measured at pretest, individual preparation, collaboration, and posttest. Two conditions were compared: generative preparation and nongenerative preparation. With no differences in knowledge at pretest, we found that students who prepared by engaging in the generative compared to the nongenerative preparation task performed worse to a statistically significant degree in both the preparation and collaboration phases. However, in a postactivity transfer task, the students performed to a similar degree as the comparison group evidencing productive failure. In addition, students in the generative condition showed greater learning gains from the preparation to the collaboration phase. We introduce the notion that generative preparation may better invoke learning mechanisms that help students to learn from subsequent collaboration.  相似文献   

On Generalization and Variation Theory     

Ho Cheong Lam 《Scandinavian Journal of Educational Research》2013,57(4):343-356

The variation theory developed by Marton has quickly become popular as a framework for providing guidance for making learning possible. However, the epistemological assumption behind the theory is often accepted without critical scrutiny. This paper poses an apparent problem of the possible occurrence of learning in the situation of generalization, where one aspect is kept invariant, while other aspects vary. Eventually some of the learners can learn the invariant aspect. However, variation theory entails that the experience of variation in an aspect is necessary for learners to discern that aspect. How then is it possible for the learners in a situation of generalization to fully discern the invariant aspect? Through scrutinizing the epistemological assumption, I hope to foster discussion toward further improvement of the theory.  相似文献   

Teacher and student intrinsic motivation in project-based learning   总被引：1，自引：0，他引：1  

Shui-fong Lam  Rebecca Wing-yi Cheng  William Y. K. Ma 《Instructional Science》2009,37(6):565-578

In this study we examined the relationship between teacher and student intrinsic motivation in project-based learning. The participants were 126 Hong Kong secondary school teachers and their 631 students who completed evaluation questionnaires after a semester-long project-based learning program. Both teachers and students were asked to indicate their motivation in the program, and students were also asked to report the instructional support they received from their teachers. The results of hierarchical linear modeling analyses showed that teacher intrinsic motivation predicted student intrinsic motivation directly as well as indirectly through the mediation of instructional support. When teachers reported higher intrinsic motivation in the program, their students tended to perceive receiving more support from them and to report higher intrinsic motivation in the learning experience.  相似文献   

优化电子期刊展示与标识的PIE-J规程解析     

向佳丽  林秀丽 《图书情报工作》2018,62(6):37-44

[目的/意义]通过对PIE-J的系统解析,使PIE-J在中国获得更多的关注与了解,以期电子期刊供应链上的各方合作优化电子期刊元数据,解决电子期刊难以搜寻这个长期困扰各方的问题。[方法/过程]通过归纳、实例分析等方法对PIE-J的制定背景、意义、主要内容、应用情况及其对中国电子期刊展示与标识的启示进行分析。[结果/结论]PIE-J通过简明的语言和形象的例子对电子期刊元数据的标识进行详细指引,可提高开放链接质量,提高使用者对期刊文章的查找效率和准确率,进一步完善与发展电子期刊。在我国目前尚未出台电子期刊标识标准的情况下,中国电子期刊出版商或供应商如能参照PIE-J优化电子期刊元数据,对于提高自身产品的竞争力,促进国内及海外市场的开拓将大有裨益。  相似文献   

Teacher Evaluation and Effectiveness in Hong Kong: Issues and Challenges     

John Chi Kin Lee  Wing Po Lam  Yuk Yung Li 《Journal of Personnel Evaluation in Education》2003,17(1):41-65

This article first provides an overview of teacher effectiveness and evaluation in Hong Kong. Several studies related to classroom environment and teacher behavior in selected subjects are referenced, as are recent studies of teachers instructional leadership. Finally, the preliminary use of the Revised Classroom Observation Instrument (RCOI) from the Louisiana School Effectiveness Study in three secondary schools is reported. The results from using the RCOI in Hong Kong indicate that some items may be irrelevant in the Hong Kong context (e.g., physical characteristics), while more items may be needed to reflect good teaching in Hong Kong (e.g., questioning skills). In addition, the potential use of teacher profiles to drive staff development and school improvement is explored.  相似文献   

Student plagiarism in higher education in Vietnam: an empirical study     

Khang Do Ba  Khai Do Ba  Quoc Dung Lam  Dao Thanh Binh An Le  Phuong Lien Nguyen  Phuong Quynh Nguyen 《高等教育研究与发展》2017,36(5):934-946

This paper assesses and compares the prevalence of plagiarism across different student and assignment characteristics at a university in Vietnam, using the similarity index reported by the text-matching software Turnitin as a proxy measure of plagiarism on a sample of 681 student papers. The findings present a level of match higher than reported in earlier studies at universities outside of Vietnam, with an average similarity index of 29.06%. Controlling for the gender and major of the students, the extent of plagiarism is implied to be negatively correlated with the students’ academic performances and with the likelihood of being caught, and positively correlated with the length of the assignments. Thus, this study, relying on actual text-matching data rather than self-reported surveys, provides the first empirical test of two theoretical plagiarism models proposed in the literature. The explanatory factors confirmed by this study illustrate the potential benefits of the use of software tools to detect plagiarism and can help refine academic integrity policy formulations for universities.  相似文献