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The need to cluster small text corpora composed of a few hundreds of short texts rises in various applications; e.g., clustering top-retrieved documents based on their snippets. This clustering task is challenging due to the vocabulary mismatch between short texts and the insufficient corpus-based statistics (e.g., term co-occurrence statistics) due to the corpus size. We address this clustering challenge using a framework that utilizes a set of external knowledge resources that provide information about term relations. Specifically, we use information induced from the resources to estimate similarity between terms and produce term clusters. We also utilize the resources to expand the vocabulary used in the given corpus and thus enhance term clustering. We then project the texts in the corpus onto the term clusters to cluster the texts. We evaluate various instantiations of the proposed framework by varying the term clustering method used, the approach of projecting the texts onto the term clusters, and the way of applying external knowledge resources. Extensive empirical evaluation demonstrates the merits of our approach with respect to applying clustering algorithms directly on the text corpus, and using state-of-the-art co-clustering and topic modeling methods. 相似文献
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Educational technology research and development - Video games’ capacity to facilitate complex and interactive modes of engagement has led to their portrayal as particularly effective means... 相似文献
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Arulmani Gideon van Laar Darren Easton Simon 《International Journal for Educational and Vocational Guidance》2003,3(3):193-204
This paper responds to current discussions in career psychology that emphasise the importance of understanding how socio-economic
backgrounds and social-cognitive environments influence career development. Located in India, this study examines the interaction
between career beliefs and socio-economic status within a sample of Indian high school students. Significant socio-economic
status differences were observed, with the lower SES groups showing higher levels of negative career beliefs. The relevance
of these findings to career psychologists who work in multi cultural contexts is discussed within the framework of the Social
Cognitive Theories of Career Decision Making.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Gideon Dishon 《Paedagogica Historica: International Journal of the History of Education》2017,53(4):364-380
This article examines the ascendance of team sports as tools of “character building” in British Victorian public schools in the second half of the nineteenth century. The focus of this enquiry is the commonly overlooked pedagogical innovation underlying this process – the utilisation of organised games as educational tools. Relying on Roger Caillois' delineation of the unique qualities of game playing, I explore how team sports’ game qualities shaped their educational function and perception in Victorian public schools. Broadly stated, these game qualities enabled team sports to function as an ideal site for shaping on-court behaviour, while limiting their long-term effect on student conduct. Two central limitations of the Victorian application of game playing are pointed out. First, offering an organised model of play, team sports increased adult control over students’ play patterns, yet they concurrently undermined student agency within play, and the relevance of these activities to external contexts. Moreover, Victorian educators assumed that lessons learned on the court would readily carry over to other areas of students’ lives and failed to meaningfully incorporate team sports into the broader educational curriculum. These lessons concerning the educational function of games are particularly timely in light of the growing pervasiveness of games, physical and virtual, in educational contexts and in children’s lives in general. 相似文献
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Invention and Productive Failure activities ask students to generate methods that capture the important properties of some given data (e.g., uncertainty) before being taught the expert solution. Invention and Productive Failure activities are a class of scientific inquiry activities in that students create, implement, and evaluate mathematical models based on data. Yet, lacking sufficient inquiry skills, students often do not actualize the full potential of these activities. We identified key invention strategies in which students often fail to engage: exploratory analysis, peer interaction, self-explanation, and evaluation. A classroom study with 134 students evaluated the effect of supporting these skills on the quality and outcomes of the invention process. Students in the Unguided Invention condition received conventional Invention Activities; students in the Guided Invention condition received complementary metacognitive scaffolding. Students were asked to invent methods for calculating uncertainties in best-fitting lines. Guided Invention students invented methods that included more conceptual features and ranked the given datasets more accurately, although the quality of their mathematical expressions was not improved. At the process level, Guided Invention students revised their methods more frequently and had more and better instances of unprompted self-explanations even on components of the activity that were not supported by the metacognitive scaffolding. Classroom observations are used to demonstrate the effect of the scaffolding on students’ learning behaviours. These results suggest that process guidance in the form of metacognitive scaffolding augments the inherent benefits of Invention Activities and can lead to gains at both domain and inquiry levels. 相似文献
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Ido Roll Vincent Aleven Bruce M. McLaren Kenneth R. Koedinger 《Metacognition and Learning》2007,2(2-3):125-140
Intelligent Tutoring Systems have been shown to be very effective in supporting learning in domains such as mathematics, physics,
computer programming, etc. However, they are yet to achieve similar success in tutoring metacognition. While an increasing
number of educational technology systems support productive metacognitive behavior within the scope of the system, few attempt
to teach skills students need to become better future learners. To that end, we offer a set of empirically-based design principles
for metacognitive tutoring. Our starting point is a set of design principles put forward by Anderson et al. (Journal of the Learning Sciences, 4:167–207, 1995) regarding Cognitive Tutors, a family of Intelligent Tutoring Systems. We evaluate the relevance of these
principles to the tutoring of help-seeking skills, based on our ongoing empirical work with the Help Tutor. This auxiliary
tutor agent is designed to help students learn to make effective use of the help facilities offered by a Cognitive Tutor.
While most of Anderson’s principles are relevant to the tutoring of help seeking, a number of differences emerge as a result
of the nature of metacognitive knowledge and of the need to combine metacognitive and domain-level tutoring. We compare our
approach to other metacognitive tutoring systems, and, where appropriate, propose new guidelines to promote the discussion
regarding the nature and design of metacognitive tutoring within scaffolded problem-solving environments. 相似文献
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Niels Smits Gideon J. Mellenbergh Harrie C. M. Vorst 《Journal of Educational Measurement》2002,39(3):187-206
In this article, grade point average (GPA) is considered a missing data technique for unavailable grades in school grade records. In Study 1, theoretical and empirical differences between GPA and seven alternative missing grade techniques were considered. These seven techniques are subject mean substitution, corrected subject mean, subject correlation substitution, regression imputation, expectation maximization algorithm imputation and two multiple imputation methods-stochastic regression imputation and data augmentation., The missing grade techniques differ greatly. Data augmentation and stochastic regression imputation appear to be superior as missing grade techniques. In Study 2, the completed grade records (observed and imputed values) were used in two prediction analyses of academic achievement. One analysis was based on unweighed grades, the other on weighed grades. In both analyses, alternative missing grade methods produced better and more consistent predictions. It is concluded that some alternative missing grade methods are superior to GPA. 相似文献
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Ido Gideon 《British Educational Research Journal》2022,48(1):182-200
In Israel, the Israeli–Palestinian conflict is the most fundamental political and moral issue current and future citizens face. If we accept the maxim that schools should prepare citizens for participation in determining the future of their state, Israeli students must be introduced to the historical, political and moral questions at the heart of the conflict. But this responsibility of Israeli schools and teachers is a highly contentious issue. The most important issue in Israeli political education is thus the hardest to teach. In this article I argue that, despite considerable educational and political risks, teaching Jewish Israeli students about the 1948 Palestinian Nakba (alternatively known as the Israeli War of Independence) holds substantial potential for their epistemic development as capable knowers. I begin by reviewing the political, dialogical, cognitive and epistemic deficits in Israeli education, highlighting how the Nakba is suppressed in history and citizenship education. By analysing the epistemic context of the Nakba in Israeli society and education, I present two pedagogical approaches for teaching controversial issues, arguing for an inquiry-based approach over the widely held approach. I demonstrate the benefits of an inquiry-based approach in the context of history education. In the final section of the article, I build on the case of the Nakba to argue for a new epistemic framework for Israeli citizenship education. I begin by outlining the shortcomings of the current epistemic framework of the subject and point to possible future directions for the subject. 相似文献