Digital Module 16: Longitudinal Data Analysis     

Jeffrey R. Harring  Tessa L. Johnson 《Educational Measurement》2020,39(3):137-138

In this digital ITEMS module, Dr. Jeffrey Harring and Ms. Tessa Johnson introduce the linear mixed effects (LME) model as a flexible general framework for simultaneously modeling continuous repeated measures data with a scientifically defensible function that adequately summarizes both individual change as well as the average response. The module begins with a nontechnical overview of longitudinal data analyses drawing distinctions with cross-sectional analyses in terms of research questions to be addressed. Nuances of longitudinal designs, timing of measurements, and the real possibility of missing data are then discussed. The three interconnected components of the LME model—(1) a model for individual and mean response profiles, (2) a model to characterize the covariation among the time-specific residuals, and (3) a set of models that summarize the extent that individual coefficients vary—are discussed in the context of the set of activities comprising an analysis. Finally, they demonstrate how to estimate the linear mixed effects model within an open-source environment (R). The digital module contains sample R code, diagnostic quiz questions, hands-on activities in R, curated resources, and a glossary.  相似文献   

For sale, by degrees: Overseas students and the commodification of higher education in Australia and the United Kingdom     

Anthony R. Welch 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1988,34(3):387-395

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So many filters, so little time: the development of a search filter appraisal checklist          下载免费PDF全文

Julie Glanville  Sue Bayliss  Andrew Booth  Yenal Dundar  Hasina Fernandes  Nigel David Fleeman  Louise Foster  Cynthia Fraser  Anne Fry-Smith  Su Golder  Carol Lefebvre  Caroline Miller  Suzy Paisley  Liz Payne  Alison Price    Karen Welch 《Medical Library and Historical Journal》2008,96(4):356-361

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The Path of Least Resistance: Using Available Tools to Support the E-Resources Lifecycle     

Tessa Minchew  Sofia Slutskaya 《期刊图书馆员》2016,70(1-4):236-246

On the surface, it might appear that libraries with different collections, staffing levels, and budgets would have to make use of different tools to address their e-resource management needs. However, in their review of electronic resources lifecycle work at North Carolina State University and Georgia Perimeter College, Tessa Minchew and Sofia Slutskaya discovered that this is not always the case. The presenters reviewed the electronic resources lifecycle and three distinct types of tools (content management systems/wikis, Microsoft Access, and Trello) that are being used in different ways to address different lifecycle-related tasks at each of their institutions.  相似文献   

Factors affecting journal submission numbers: Impact factor and peer review reputation     

Thomas E. Gaston  Francesca Ounsworth  Tessa Senders  Sarah Ritchie  Emma Jones 《Learned Publishing》2020,33(2):154-162

Previous research has found that researchers rank journal reputation and impact factor (IF) amongst the key selection criteria when choosing where to submit. We explored the actual effect upon submission numbers of several possible factors. We retrieved 10 years of submission data from over a thousand journals, as well as data on IF, retractions, and other factors. We performed statistical analysis and identified correlations. We also undertook case study research on the 55 most significant submission decreases. We found a statistically significant correlation between changes in IF, ISI percentage ranking, and changes in submissions numbers in subsequent years. We also found a statistically significant effect on submission numbers in the year following the publication of a retraction. Our case studies identified other factors, including negative feedback on the peer review process. Our findings regarding IF confirm previous indications about the significance of IF on submissions. We explain the correlation with retractions through the concept of ‘peer review reputation’. These results indicate that editors and publishers need to focus on a journal's peer review practices, as well as a journal's IF, if they are to maintain and grow submissions.  相似文献   

Book reviews     

E. D. Duryea  Neville Bennett  Sharom Ahmat  Dietrich Brandt  Lionel S. Lewis  Ian Woodburn  Claude E. Welch Jr.  Sheila Slaughter  Pierre L. van den Berghe  Doreen Harrison 《Higher Education》1980,9(2):227-237

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The emergence of a knowledge-based theory of internationalisation     

Lawrence S. Welch 《普罗米修斯》2015,33(4):361-374

This paper charts the development of the knowledge-based theory of internationalisation, driven particularly by early research at the University of Uppsala, led by Sune Carlson. Information and knowledge, allied with an interest in the associated effect on risk and uncertainty, were components of a process perspective. Its essence was a focus on the restraining effects of a lack of knowledge as decision-makers contemplated international market entry or expansion requiring a commitment of resources in various forms, in different types of foreign operations (such as exporting, licensing and foreign direct investment). Lack of knowledge of a prospective foreign market (of its characteristics, culture, ways of doing business) was seen to create uncertainty so that firm decision-makers would be less prepared to commit resources. This situation was bound to change as a firm conducted operations in the foreign market and acquired experiential knowledge (learning by doing), which made the foreign market less of a mystery, in the process lowering uncertainty. As the learning process unfolded, and expanded opportunities were perceived, at some stage the firm might be prepared to undertake additional commitments to the foreign market. Empirical research at Uppsala, and in Finland, had shown a pattern of gradual expansion of foreign commitments by internationalising firms. In terms of theoretical development, a key step was relaxation of the assumption of perfect knowledge used in economics (not without critique), noted by Don Lamberton in 1974. Following the development of internationalisation theory in the 1970s, there was a range of extensions to the basic theory, such as the role of networks, the nature of inward–outward connections, and the need for knowledge to pass over language hurdles in the process of international transmission – within and outside the firm. In one sense, the internationalisation of companies was a perfect research site for an exploration of the role of information and knowledge in firm behaviour, given the additional exigencies of the diverse and demanding information environment that is the international arena.  相似文献   

The book availability study as an objective measure of performance in a health sciences library     

S J Kolner  E C Welch 《Bulletin of the Medical Library Association》1985,73(2):121-131

In its search for an objective overall diagnostic evaluation, the University of Illinois Library of the Health Sciences' Program Evaluation Committee selected a book availability measure; it is easy to administer and repeat, results are reproducible, and comparable data exist for other academic and health sciences libraries. The study followed the standard methodology in the literature with minor modifications. Patrons searching for particular books were asked to record item(s) needed and the outcome of the search. Library staff members then determined the reasons for failures in obtaining desired items. The results of the study are five performance scores. The first four represent the percentage probability of a library's operating with ideal effectiveness; the last provides an overall performance score. The scores of the Library of the Health Sciences demonstrated no unusual availability problems. The study was easy to implement and provided meaningful, quantitative, and objective data.  相似文献   

Why Learn? Higher Education in a Learning Society     

Tessa Blackstone 《Higher Education Quarterly》2001,55(2):175-184

It is an honour to be invited to give the Birley Lecture here at City University 1 . Many previous lecturers had personal contacts with Robert Birley. Alas, I did not, like Lord Prior, keep pigs at Charterhouse during the war. Nor was I spotted by Robert Birley on the strength of brilliant scholarship answers in history, but coupled with undistinguished Latin and Greek, and worse mathematics, like William Rees-Mogg. But I do share with Robert Birley a passion for education. Not only as an end in itself, but also as a means to increase the prosperity of society as a whole and the life-chances of individuals. I want to concentrate this evening on university education, and to make links with the very end of Robert Birley's distinguished career, when he was professor and head of the department of social sciences here. I shall talk about the future of higher education in a world which is changing rapidly, and in which the application of knowledge will be essential to our prosperity.  相似文献   

On the Possibility, or Otherwise, of Hypercomputation     

Welch  P. D. 《The British journal for the philosophy of science》2004,55(4):739-746

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