1,721,302 research outputs found
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
Understanding adolescent sexually abstinent behavior and intentions through structural equation modeling and use of the integrated theory
No full textAdolescent sex research, historically, has suffered from 4 limitations: a lack of theoretical grounding to guide the development of hypotheses (in individual studies); the absence of a multidimensional theoretical model on sexual behavior; use of simple univariate/bivariate analytic techniques; and little systematic study of sexual abstinence. These remain important limitations, as the federal government has increased its allocation of millions of dollars annually for abstinence-promotion programs and 1 in 5 US teens still report having had sexual intercourse before the age of 15. The purpose of this dissertation study was to utilize structural equation modeling to 1) test The Integrated Theory in explaining adolescentsâ sexually abstinent behavior and intentions to remain abstinent before marriage, and 2) refine the theory to reflect which elements contribute more powerfully to the explanation of adolescentsâ behavior and intentions. An anonymous, theory-based paper-and-pencil questionnaire was administered to 2 non-random samples of 7th/8th grade youth (Wave 1 N = 451, Wave 2 N = 448), taking part in a broader evaluation study of Title V-funded abstinence-only-until-marriage education programs in Texas. The questionnaire assessed adolescentâ s self-reported sexual behaviors, intentions to remain abstinent, environmental constraints, beliefs, subjective norms, pro-abstinence self-standards, emotions regarding sexual abstinence and sex before marriage, and self-efficacy. Measurement modeling provided sufficient evidence for establishing construct validity. Initial structural model fit (Wave 2 data) was satisfactory; however, a refined model demonstrated better fit, yielding a Ï 2/df ratio of 3.16, CFI/TLI values of 0.73/0.95, and RMSEA and WRMR values of 0.07 and 0.86, respectively. Greater endorsement of abstinence-related standards predicted stronger beliefs toward staying abstinent, stronger perceptions that others endorse pro-abstinence norms, and a greater self-efficacy to remain abstinent until marriage. In turn, beliefs, perceived norms, and self-efficacy were predictive of intentions (β = .379, .300, and .273, respectively, p â ¤ .001). I found similar findings in a second modeling analysis (replication) using a second but similar set of sample data (from Wave 1). Results indicate The Integrated Theory may be useful in explaining adolescentsâ intention to remain abstinent and their subsequent abstinent behavior. I identify several implications for future study and health education practice
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
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
Sample Size for Joint Testing of Indirect Effects
Get PDFThis paper presents methods to calculate sample size for evaluating mediation by joint testing of both links in an indirect pathway from exposure to mediator to outcome. Calculations rely on simulations of the underlying data structure, with testing of the two links performed under the simplifying assumption that the two test statistics are asymptotically independent. Simulations show that the proposed methods are accurate. Continuous and binary exposures and mediators, as well as continuous, binary, count, and survival outcomes are accommodated, along with over-dispersion of count outcomes, design effects, and confounding of the exposure-mediator and mediator-outcome relationships. An illustrative example is provided, and a documented R program implementing the calculations is available online
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