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

  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   

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

  相似文献   

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

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

  相似文献   

Another note on the education of urban West Indian black Canadians     

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

  相似文献   

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   

Influence of a conservative sleep management strategy during a solo Pacific Ocean crossing on anxiety and perceived fatigue: a case study     

Hagin V  Gonzales BR  Candau RB  Groslambert A 《Journal of sports sciences》2012,30(4):395-402

The aim of this case study was to determine whether a sailor's deliberate choice of a conservative strategy to manage sleep deprivation would allow him to cross the Pacific Ocean and to minimize his state of anxiety and perceived fatigue. The participant, who had more than 10 years' sailing experience in severe conditions, was tested on a small catamaran without any living quarters during a solo Pacific Ocean crossing. Estimations of sleep hours, state anxiety, and perceived fatigue were self-reported by the sailor on a daily basis using a specific questionnaire. The most important finding is that the sailor's deliberate sleep strategy, 5.4 h sleep per day (24% less than on-shore), was enough to keep his anxiety and perceived fatigue within acceptable limits and enabled him to achieve his goal, which was the first crossing of the Pacific Ocean on a catamaran of less than 6 m. In conclusion, our results suggest that the sailor observed in the present case study was able to minimize anxiety and perceived fatigue with adequate sleep to optimize his performance, security, and to achieve his goal.  相似文献   

College students' views on criminal justice     

Margaret Farnworth  Dennis R. Longmire  Vincent M. West 《Journal of Criminal Justice Education》2013,24(1):39-57

We surveyed 683 college students to examine their attitudes toward the death penalty, other criminal sanctions, and the war on drugs. College seniors were consistently less likely than freshmen to hold punitive views; this suggests a “liberalizing” effect of the college experience. This liberalizing college effect on attitudes toward criminal justice was not apparent for criminal justice majors, however, particularly when criminal justice seniors' attitudes toward the death penalty were compared with those of freshmen in criminal justice. The views of criminal justice majors overall did not differ appreciably from other students' views. We found no support for the expectation that criminal justice majors with experience in criminal justice would express more conservative, more punitive views than would criminal justice majors in general.  相似文献   

Closing the gap: supporting literacy through a computer-assisted-reading-intervention     

Kerry Vincent 《Support for Learning》2020,35(1):68-82

Schools in England are expected to ‘close the gap’ for a range of vulnerable pupils who are achieving below the levels seen amongst their same-aged peers. They are also highly accountable for additional funding that is provided to support this goal. The project reported here involved collating and analysing a range of data in order to evaluate the impact of a widely used computer-assisted-reading-intervention (CARI). Sixteen primary school pupils, all of whom were identified by their school as underachieving in literacy, used the CARI daily over a five-week period. The post-intervention data showed some clear gains in reading and spelling skills for all bar one of the children. The findings are discussed in relation to the wider literatures on CARIs. The research concludes that the CARI under investigation offers a useful and cost-effective adjunct to whole-class and group reading instruction and may be particularly beneficial for supporting the learning of pupils who are struggling to consolidate the knowledge and skills covered in their regular classroom reading instruction.  相似文献