Averages of ratios vs. ratios of averages: An empirical analysis of four levels of aggregation     

Vincent Larivière  Yves Gingras 《Journal of Informetrics》2011,5(3):392-399

In the recent debate on the use of averages of ratios (AoR) and ratios of averages (RoA) for the compilation of field-normalized citation rates, little evidence has been provided on the different results obtained by the two methods at various levels of aggregation. This paper provides such an empirical analysis at the level of individual researchers, departments, institutions and countries. Two datasets are used: 147,547 papers published between 2000 and 2008 and assigned to 14,379 Canadian university professors affiliated to 508 departments, and all papers indexed in the Web of Science for the same period (N = 8,221,926) assigned to all countries and institutions. Although there is a strong relationship between the two measures at each of these levels, a pairwise comparison of AoR and RoA shows that the differences between all the distributions are statistically significant and, thus, that the two methods are not equivalent and do not give the same results. Moreover, the difference between both measures is strongly influenced by the number of papers published as well as by their impact scores: the difference between AoR and RoA is greater for departments, institutions and countries with low RoA scores. Finally, our results show that RoA relative impact indicators do not add up to unity (as they should by definition) at the level of the reference dataset, whereas the AoR does have that property.  相似文献   

Analysis of gene expression at the single-cell level using microdroplet-based microfluidic technology     

Mary P  Dauphinot L  Bois N  Potier MC  Studer V  Tabeling P 《Biomicrofluidics》2011,5(2):24109

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Fostering parents-professional collaboration for facilitating the school inclusion of students with ASD: design of the “ToGather” web-based prototype     

Mazon  Cécile  Etchegoyhen  Kattalin  Saint-Supery  Isabeau  Amestoy  Anouck  Bouvard  Manuel  Consel  Charles  Sauzéon  Hélène 《Educational technology research and development : ETR & D》2022,70(1):231-262

Educational technology research and development - In recent years, many psycho-educational technologies were studied to address the school-related difficulties encountered by students with autism...  相似文献   

Differences in Brain Activation Between Novices and Experts in Science During a Task Involving a Common Misconception in Electricity     

Steve Masson  Patrice Potvin  Martin Riopel  Lorie‐Marlène Brault Foisy 《Mind, Brain, and Education》2014,8(1):44-55

Science education studies have revealed that students often have misconceptions about how nature works, but what happens to misconceptions after a conceptual change remains poorly understood. Are misconceptions rejected and replaced by scientific conceptions, or are they still present in students' minds, coexisting with newly acquired scientific conceptions? In this study, we use functional magnetic resonance imaging (fMRI) to compare brain activation between novices and experts in science when they evaluate the correctness of simple electric circuits. Results show that experts, more than novices, activate brain areas involved in inhibition when they evaluate electric circuits in which a bulb lights up, even though there is only one wire connecting it to the battery. These findings suggest that experts may still have a misconception encoded in the neural networks of their brains that must be inhibited in order to answer scientifically.  相似文献   

Graphophonemic awareness in adults after instruction in phonic generalisations     

Vincent Connelly   《Learning and Instruction》2002,12(6)

A number of studies have shown, counter-intuitively, that skilled adult readers find it difficult to correctly relate phonemes to graphemes in written words. In most adults this is of little consequence. However, teachers are required to show children how to relate phonemes to graphemes when teaching reading. This study investigated whether a brief period of instruction would improve the ability of adults in this task. Results showed a general level of improvement relative to controls. Exposure alone to the task had no effect. Improvement for the instructed group was not very large and there was difficulty relating phonemes to graphemes which had more than one letter. It may be that trainee teachers need instruction to improve knowledge of grapheme phoneme correspondence so that they can pass such knowledge onto young readers.  相似文献   

Training educational administrators in Central America     

Jean-François Bernède 《Prospects》1977,7(1):113-117

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Teacher portraiture: A timely proposal for more effective teacher development     

Vincent Rogers  John Brubacher 《Journal of Personnel Evaluation in Education》1988,1(3):245-257

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The Influence of Learning Theory on the Behavior of the Teacher in the Classroom     

Vincent Roper 《Educational theory》1974,24(2):155-160

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Another note on the education of urban West Indian black Canadians     

Vincent D'Oyley 《Interchange》1976,7(2):23-26

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National testing for college and university: The role of the Service for Admission to College and University (SACU) in Canadian higher education     

Vincent R. D'oyley  Hermann Müller-Solger 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1975,21(1):91-109

Taking the present crisis of the Canadian Service of Admission to College and University as a starting point, the authors examine the history of SACU, which in 1971 was still a comparatively efficient organisation. Changes in the wider society, such as growing provincialism in Canada as well as stagnation or decline in enrolment together with a broader acceptance of the philosophy of open admission, have led to a drastic decline in the number of participants in the tests and to severe criticism of the predominantly selective function of SACU. It is felt that a reorientation of the testing activities of SACU should be in the direction of distributive and counselling functions, thus adopting the 1970 recommendations of the Commission on Tests of the American College Entrance Examination Board.  相似文献