1,721,075 research outputs found
Some drivers of test item difficulty in mathematics
Full text linkThis paper is one of four contributions to the symposium session at the AERA’s 2012 Annual Meeting titled Exploring Reading and Mathematics Item Difficulty: Teaching and Learning Implications of PISA Survey Data. The author presents a rubric used to analyse mathematics test items developed for use in the OECD’s PISA survey. The rubric focuses on a set of mathematical competencies that are components of mathematical literacy. The work on which this report is based suggests that demand for activation of these competencies functions as a significant driver of item difficulty, which potentially has implications for the teaching and learning of mathematics.
For an examination of the empirical validation of the competency rubric described in this paper refer to Turner, Ross; Adams, Ray J. (April 2012). Some drivers of test item difficulty in mathematics : an analysis of the competency rubric. Paper presented at the Annual Meeting of the American Educational Research Association (AERA), Vancouver, 13-17 April 2012. http://research.acer.edu.au/pisa/7
Some drivers of test item difficulty in mathematics : an analysis of the competency rubric
Full text linkThis paper is concerned with the empirical validation of the competency rubric described in another paper presented at the same conference: Turner, Ross (April 2012). Some drivers of test item difficulty in mathematics. Paper presented at the Annual Meeting of the American Educational Research Association (AERA), Vancouver, 13-17 April 2012 http://research.acer.edu.au/pisa/4/
Using items developed for the PISA 2012 survey, and data collected as part of an extensive field trial of the PISA tasks conducted during 2011 in some 67 countries, the authors use multidimensional Rasch modelling and latent regression to examine the following three questions: 1. What is the level of agreement among raters when they apply the competency rubric? 2. Does each of the competencies capture different dimensions of cognitive complexity in the tasks? 3. To what extent do ratings of the cognitive complexity account for (predict) the difficulty of the tasks for students
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
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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