1,721,045 research outputs found
Miss Lindquist : un système fondé sur le dialogue pour apprendre à exprimer algébriquement des énoncés en langage naturel
No full textSymbolization is the ability to translate a real world situation into [NTH1J the language of algebra. We believe that symbolization is the single most important skill students learn in high school algebra. We present research on what makes this skill difficult and report the discovery of a “ hidden ” skill in symbolization. Contrary to past research that has emphasized that symbolization is difficult due to both comprehension difficulties and the abstract nature of variables , we found that symbolization is difficult because it is the articulation in the “foreign” language of “algebra”. We also present Mrs Lindquist, an Intelligent Tutoring System (ITS) designed to carry on a tutorial dialog about symbolization. Mrs Lindquist has a separate tutorial model encoding pedagogical content knowledge in the form of different tutorial strategies, which were partially developed by observing an experienced human tutor. We discuss aspects of this human tutor’s method that can be modeled well by Mrs Lindquist. Finally, we present an early formative showing that students can leam from the dialogs Mrs Lindquist is able to engage student in. Mrs Lindquist has tutored over one thousand of students at wwwAlgebraTutor.org.La symbolisation est la compétence permettant de traduire en langage algébrique une situation du monde réel. A notre sens, c’est la compétence principale à acquérir par les élèves pour l’apprentissage de l’algèbre au niveau de l’enseignement secondaire. Nous présentons une recherche portant sur les problèmes posés par l’acquisition de cette compétence, étude qui a mis en évidence une «compétence cachée » à l’intérieur de la symbolisation. Contrairement à des recherches antérieures qui ont analysé cette acquisition en termes de difficultés de compréhension des textes des énoncés et de compréhension du rôle abstrait des variables, nous pensons que l’algèbre est une langue étrangère pour les élèves et que c’est la difficulté pour eux à s’exprimer dans cette langue étrangère qui pose problème pour l’acquisition de la symbolisation. Nous présentons également Mrs Lindquist, un tuteur intelligent (TI) conçu pour mener un dialogue pédagogique sur des exercices de symbolisation. Mrs Lindquist possède un modèle pédagogique spécifique pour représenter la connaissance pédagogique sous forme de différentes stratégies mises au point en observant un enseignant (humain) expérimenté. Nous discutons certains des aspects de la méthode mise en œuvre par le tuteur humain que nous avons modélisés dans Mrs Lindquist. Enfin, nous présentons une première évaluation formative de notre système qui montre que les élèves peuvent apprendre à partir des dialogues où ils peuvent s’engager grâce à Mrs Lindquist. Mrs Lindquist a ainsi formé plus de mille élèves sur le site www.AlgebraTutor.org.Heffeman Neil T., Koedinger Kenneth R. Miss Lindquist : un système fondé sur le dialogue pour apprendre à exprimer algébriquement des énoncés en langage naturel. In: Sciences et techniques éducatives, volume 9 n°1-2, 2002. Logiciels pour l'apprentissage de l'algèbre (dir. Jean-François Nicaud, Elisabeth Delozanne, Brigitte Grugeon) pp. 11-35
Pedagogical Agents Trying on a Caring Mentor Role
Get PDFIssue called: Artificial Intelligence in Education - Building Technology Rich Learning Contexts That WorkWe describe the design and evaluation of an affective pedagogical agent persona for Intelligent Tutoring Systems. The goal of our research was to develop an agent embodying a persona of a caring mentor interested in the learner's progress. The agent's behaviour is guided by a set of rules that are triggered by the states of the session history. Four agents were integrated with EER-Tutor for a formative evaluation study. The mentor persona secured strong rapport with the users; the audible narration was seen as a strong feature of the agents
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Simulated Students and Classroom Use of Model-Based Intelligent Tutoring
Get PDFTwo educational uses of models and simulations: 1) Students create models and use simulations ; and 2) Researchers create models of learners to guide development of reliably effective materials. Cognitive tutors simulate and support tutoring - data is crucial to create effective model. Pittsburgh Science of Learning Center: Resources for modeling, authoring, experimentation. Repository of data and theory. Examples of advanced modeling efforts: SimStudent learns rule-based model. Help-seeking model: Tutors metacognition. Scooter uses machine learning detectors of student engagement
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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