Assessment for learning: a catalyst for student self-regulation     

Eleanor Hawe  Helen Dixon 《Assessment & Evaluation in Higher Education》2017,42(8):1181-1192

The development of students as lifelong, self-regulating learners is a valued outcome of higher education. To this end, the current project investigated how students in an undergraduate course experienced and responded to a teaching–learning environment where they were expected to take responsibility for their learning. The pedagogic environment of this course was grounded in strategies and activities associated with assessment for learning (AfL). As such, students were expected to participate in activities that provided them with opportunities to exercise control over their learning. Data gathering comprised individual semi-structured interviews and the collection of artefacts. Findings indicated goals helped students know where they were going; exemplars provided insights into what was expected and what constituted quality work; course activities elicited evidence of learning; dialogic interactions around these generated feedback about understandings and progress; the evaluation of exemplars developed evaluative knowledge, skill and expertise; peer review and feedback provided an authentic context for evaluation and monitoring of works-in-progress. It was concluded that, while each of the AfL strategies contributed to student self-regulation, the full impact of AfL as a catalyst for self-regulated learning was realised in the cumulative and recursive effect these strategies had on students’ thinking, actions and feelings.  相似文献   

Written feedback in intercultural doctoral supervision: a case study     

Linlin Xu 《Teaching in Higher Education》2017,22(2):239-255

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具有二次性能指标的最优输出反馈的一个必要条件     

黄献青  瞿坦 《科技通报》1996,12(1):4-9

本文用矩阵的秩这个工具考察了有限维线性系统具有二次性能指标的最优输出反馈问题，得到了一个必要条件。特殊情形下，这一条件可以演化为最优输出反馈增益与观测矩阵的乘积即为状态反馈增益这个相当清晰的关系。  相似文献   

Query expansion with terms selected using lexical cohesion analysis of documents     

Olga Vechtomova  Murat Karamuftuoglu 《Information processing & management》2007

We present new methods of query expansion using terms that form lexical cohesive links between the contexts of distinct query terms in documents (i.e., words surrounding the query terms in text). The link-forming terms (link-terms) and short snippets of text surrounding them are evaluated in both interactive and automatic query expansion (QE). We explore the effectiveness of snippets in providing context in interactive query expansion, compare query expansion from snippets vs. whole documents, and query expansion following snippet selection vs. full document relevance judgements. The evaluation, conducted on the HARD track data of TREC 2005, suggests that there are considerable advantages in using link-terms and their surrounding short text snippets in QE compared to terms selected from full-texts of documents.  相似文献   

Output feedback stabilization for symmetric control systems     

Carmen Coll  Néstor Thome 《Journal of The Franklin Institute》2005,342(7):814-823

This work is devoted to the study of symmetric control systems. It establishes a relation between internal symmetry and external one for a linear invariant control system having n real simple poles. The symmetric stabilization problem is studied using a symmetric feedback gain such that the output control stabilizes the closed-loop system. A necessary and sufficient condition is given to solve this stabilization problem for a symmetric control system (A,B,C) and a generalized symmetric control system (E,A,B,C).  相似文献   

我国城市用水探讨     

顾定法 《资源科学》1996,18(4):8-14

针对目前我国城市缺水形势严峻，同时又存在大量浪费水和水污染的现象，再一次敲响了水危机的警钟。本文结合城市用水特点，提出了城市用水、节水的基本原理。城市理想的用水系统应该是一个闭环反馈系统，这一系统应该靠节水和污水回用来实现。文中列举大量数据分析城市节水取0城市水资源系统、闭环反馈系统、工业用水重复利用率  相似文献   

A relevance feedback mechanism for cluster-based retrieval     

Niall Rooney  David Patterson  Mykola Galushka  Vladimir Dobrynin 《Information processing & management》2006

Contextual document clustering is a novel approach which uses information theoretic measures to cluster semantically related documents bound together by an implicit set of concepts or themes of narrow specificity. It facilitates cluster-based retrieval by assessing the similarity between a query and the cluster themes’ probability distribution. In this paper, we assess a relevance feedback mechanism, based on query refinement, that modifies the query’s probability distribution using a small number of documents that have been judged relevant to the query. We demonstrate that by providing only one relevance judgment, a performance improvement of 33% was obtained.  相似文献   

网络舆论中的蝴蝶效应：混沌理论视野的解释   总被引：2，自引：0，他引：2  

党生翠 《内蒙古大学学报(人文社会科学版)》2011,(3):115-120

由微内容引起的网络反腐、网络流言、网络造星等＂舆论风暴＂被喻为网络舆论的蝴蝶效应。该概念在学界存在一定程度的异化现象。只有将蝴蝶效应置于混沌学视野的复杂动力学图谱,引入自组织概念,才能避免网络舆论先天不足偏见。研究发现,奇异吸引子触动网络舆论蝴蝶效应的舆论扳机,正反馈集聚引发连锁反应,信息与观点的分形与迭代贯穿其全过程。  相似文献   

Student perceptions of quality feedback in teacher education   总被引：1，自引：1，他引：0  

Peter Ferguson 《Assessment & Evaluation in Higher Education》2011,36(1):51-62

Many reports have identified a perceived lack of quality in regard to assessment feedback in higher education contexts. One research study in 2007 on undergraduate university students found that less than half of the students (46%) collected their formative feedback, suggesting that from their perspective feedback clearly was not fulfilling the role it should. This is a study of 465 graduate students and 101 undergraduate students studying teacher education at a major Australian university. The study investigated what students perceived to be effective, quality feedback based upon their extensive higher education experiences. Students identified preferences in regard to form, detail and timing of assessment feedback. The data were collected by means of pen and paper survey and identified which strategies the students perceived to be the most effective, particularly within the context of large cohort teaching and written assessment formats. Findings agreed with research elsewhere regarding problems with assessment feedback quality and quantity, but students also provided clear indications of how realistic improvements could be made in terms of assessment feedback processes and strategies.  相似文献   

Investigating university tutor perceptions of assessment feedback: three types of tutor beliefs     

Jinlan Tang  Colin Harrison 《Assessment & Evaluation in Higher Education》2011,36(5):583-604

Feedback is a key element in effective teaching and learning. The issue of how teachers perceive the role of feedback will impact significantly their feedback approaches, the amount of the detail of their feedback and the time and effort expended on the feedback provision. This research was designed with the purpose of exploring how a group of over 50 tutors who were supporting an online university English course perceived, understood and interpreted the processes of assignment feedback. A factor analysis study based on questionnaire data revealed three sets of tutor beliefs towards assessment and tutor feedback: traditional–autonomous–global (TAG), student‐centred (SC) and traditional‐local (TL). Follow‐up in‐depth interviews were conducted with tutors. The TAG tutors saw scores as the most important feedback to students, but doubted the value of detailed feedback. SC tutors maintained that good tutor feedback should offer more than mere scores, and that students needed feedback in order to improve. TL tutors tended to underline all the errors and provide detailed feedback. They were negative towards the idea of their feedback being monitored. The authors identified some differing and converging tutor perceptions on assessment feedback, the understanding of which could arguably play an important role in introducing changes in tutor feedback culture.  相似文献