Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
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2Frandsen, T.F. ; Nicolaisen, J.: Citation behavior : a large-scale test of the persuasion by name-dropping hypothesis.
In: Journal of the Association for Information Science and Technology. 68(2017) no.5, S.1278-1284.
Abstract: Citation frequencies are commonly interpreted as measures of quality or impact. Yet, the true nature of citations and their proper interpretation have been the center of a long, but still unresolved discussion in Bibliometrics. A comparison of 67,578 pairs of studies on the same healthcare topic, with the same publication age (1-15 years) reveals that when one of the studies is being selected for citation, it has on average received about three times as many citations as the other study. However, the average citation-gap between selected or deselected studies narrows slightly over time, which fits poorly with the name-dropping interpretation and better with the quality and impact-interpretation. The results demonstrate that authors in the field of Healthcare tend to cite highly cited documents when they have a choice. This is more likely caused by differences related to quality than differences related to status of the publications cited.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23746/full.
3Nicolaisen, J. ; Frandsen, T.F.: Bibliometric evolution : is the journal of the association for information science and technology transforming into a specialty Journal?.
In: Journal of the Association for Information Science and Technology. 66(2015) no.5, S.1082-1085.
Abstract: Applying a recently developed method for measuring the level of specialization over time for a selection of library and information science (LIS)-core journals seems to reveal that Journal of the Association for Information Science and Technology (JASIST) is slowly transforming into a specialty journal. The transformation seems to originate from a growing interest in bibliometric topics. This is evident from a longitudinal study (1990-2012) of the bibliometric coupling strength between Scientometrics and other LIS-core journals (including JASIST). The cause of this gradual transformation is discussed, and possible explanations are analyzed.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23224/abstract.
4Frandsen, T.F. ; Nicolaisen, J.: ¬The ripple effect : citation chain reactions of a nobel prize.
In: Journal of the American Society for Information Science and Technology. 64(2013) no.3, S.437-447.
Abstract: This paper explores the possible citation chain reactions of a Nobel Prize using the mathematician Robert J. Aumann as a case example. The results show that the award of the Nobel Prize in 2005 affected not only the citations to his work, but also affected the citations to the references in his scientific oeuvre. The results indicate that the spillover effect is almost as powerful as the effect itself. We are consequently able to document a ripple effect in which the awarding of the Nobel Prize ignites a citation chain reaction to Aumann's scientific oeuvre and to the references in its nearest citation network. The effect is discussed using innovation decision process theory as a point of departure to identify the factors that created a bandwagon effect leading to the reported observations.
5Frandsen, T.F. ; Nicolaisen, J.: Effects of academic experience and prestige on researchers' citing behavior.
In: Journal of the American Society for Information Science and Technology. 63(2012) no.1, S.64-71.
Abstract: This article reports the findings of a bibliometric study of the measurable effects of experience and prestige on researchers' citing behavior. All single authors from two econometrics journals over a 10-year time period form the basis of the analysis of how experience and prestige affect the number of references in their publications. Preliminary results from linear regression models suggest that two author types can be characterized using this analysis. Review experience seems to be the decisive factor in the data. The article discusses the implications of the findings and offers suggestions for future research within this new and promising area.
6Frandsen, T.F. ; Nicolaisen, J.: Praise the bridge that carries you over : testing the flattery citation hypothesis.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.5, S.807-818.
Abstract: Flattery citations of editors, potential referees, and so on have been claimed to be a common strategy among academic authors. From a sociology of science perspective as well as from a citation analytical perspective, it is both an interesting claim and a consequential one. The article presents a citation analysis of the editorial board members entering the American Economic Review from 1984 to 2004 using a citation window of 11 years. To test the flattery citation hypothesis further, we have conducted a study applying the difference-in-differences estimator. We analyze the number of times the editors and editorial board members of the American Economic Review were cited in articles published in the journal itself as well as in a pool of documents comprising articles from the Journal of Political Economy and the Quarterly Journal of Economics. The results of the analyses do not support the existence of a flattery citation effect.
7Frandsen, T.F. ; Wouters, P.: Turning working papers into journal articles : an exercise in microbibliometrics.
In: Journal of the American Society for Information Science and Technology. 60(2009) no.4, S.728-739.
Abstract: This article focuses on the process of scientific and scholarly communication. Data on open access publications on the Internet not only provides a supplement to the traditional citation indexes but also enables analysis of the microprocesses and daily practices that constitute scientific communication. This article focuses on a stage in the life cycle of scientific and scholarly information that precedes the publication of formal research articles in the scientific and scholarly literature. Binomial logistic regression models are used to analyse precise mechanisms at work in the transformation of a working paper (WP) into a journal article (JA) in the field of economics. The study unveils a fine-grained process of adapting WPs to their new context as JAs by deleting and adding literature references, which perhaps can be best captured by the term sculpting.
Themenfeld: Internet ; Elektronisches Publizieren
8Frandsen, T.F.: ¬The integration of open access journals in the scholarly communication system : three science fields.
In: Information processing and management. 45(2009) no.1, S.131-141.
Abstract: The greatest number of open access journals (OAJs) is found in the sciences and their influence is growing. However, there are only a few studies on the acceptance and thereby integration of these OAJs in the scholarly communication system. Even fewer studies provide insight into the differences across disciplines. This study is an analysis of the citing behaviour in journals within three science fields: biology, mathematics, and pharmacy and pharmacology. It is a statistical analysis of OAJs as well as non-OAJs including both the citing and cited side of the journal to journal citations. The multivariate linear regression reveals many similarities in citing behaviour across fields and media. But it also points to great differences in the integration of OAJs. The integration of OAJs in the scholarly communication system varies considerably across fields. The implications for bibliometric research are discussed.
Themenfeld: Informetrie ; Elektronisches Publizieren
Wissenschaftsfach: Mathematik ; Biologie ; Pharmazie
9Frandsen, T.F. ; Nicolaisen, J.: Intradisciplinary differences in database coverage and the consequences for bibliometric research.
In: Journal of the American Society for Information Science and Technology. 59(2008) no.10, S.1570-1581.
Abstract: Bibliographic databases (including databases based on open access) are routinely used for bibliometric research. The value of a specific database depends to a large extent on the coverage of the discipline(s) under study. A number of studies have determined the coverage of databases in specific disciplines focusing on interdisciplinary differences; however, little is known about the potential existence of intradisciplinary differences in database coverage. Focusing on intradisciplinary differences, the article documents large database-coverage differences within two disciplines (economics and psychology). The point extends to include both the uneven coverage of specialties and research traditions. The implications for bibliometric research are discussed, and precautions which need to be taken are outlined.
10Nebelong-Bonnevie, E. ; Frandsen, T.F.: Journal citation identity and journal citation image : a portrait of the Journal of Documentation.
In: Journal of documentation. 62(2006) no.1, S.30-57.
Abstract: Purpose - The purpose of this paper is to propose a multiple set of journal evaluation indicators using methods and theories from author analysis. Among those are the journal citation identity and the journal citation image. Design/methodology/approach - The Journal of Documentation is celebrating its 60th anniversary, and for that reason it is portrayed in a bibliometric study using the two indicators, based, e.g. on analyses of references in journal articles and journal co-citation analyses. Findings - The Journal of Documentation, which is portrayed in this study is characterized by high impact and high visibility. It publishes a relatively low number of documents with scientific content compared to other journals in the same field. It reaches far into the scientific community and belongs to a field that is more and more visible. The journal is relatively closely bounded to Western Europe, which is an increasing tendency. Research limitations/implications - The research is based on analyses of just three LIS journals. Practical implications - Journal citation identity and the journal citation image indicators contribute in giving a more detailed multifaceted picture of a single journal. Originality/value - The multiple set of indicators give rise to a journal evaluation of a more qualitative nature.
Objekt: Journal of documentation
11Frandsen, T.F. ; Rousseau, R. ; Rowlands, I.: Diffusion factors.
In: Journal of documentation. 62(2006) no.1, S.58-72.
Abstract: Purpose - The purpose of this paper is to clarify earlier work on journal diffusion metrics. Classical journal indicators such as the Garfield impact factor do not measure the breadth of influence across the literature of a particular journal title. As a new approach to measuring research influence, the study complements these existing metrics with a series of formally described diffusion factors. Design/methodology/approach - Using a publication-citation matrix as an organising construct, the paper develops formal descriptions of two forms of diffusion metric: "relative diffusion factors" and "journal diffusion factors" in both their synchronous and diachronous forms. It also provides worked examples for selected library and information science and economics journals, plus a sample of health information papers to illustrate their construction and use. Findings - Diffusion factors capture different aspects of the citation reception process than existing bibliometric measures. The paper shows that diffusion factors can be applied at the whole journal level or for sets of articles and that they provide a richer evidence base for citation analyses than traditional measures alone. Research limitations/implications - The focus of this paper is on clarifying the concepts underlying diffusion factors and there is unlimited scope for further work to apply these metrics to much larger and more comprehensive data sets than has been attempted here. Practical implications - These new tools extend the range of tools available for bibliometric, and possibly webometric, analysis. Diffusion factors might find particular application in studies where the research questions focus on the dynamic aspects of innovation and knowledge transfer. Originality/value - This paper will be of interest to those with theoretical interests in informetric distributions as well as those interested in science policy and innovation studies.
12Frandsen, T.F. ; Rousseau, R.: Article impact calculated over arbitrary periods.
In: Journal of the American Society for Information Science and Technology. 56(2005) no.1, S.58-62.
Abstract: In this paper we address the various formulations of impact of articles, usually groups of articles as gauged by citations that these articles receive over a certain period of time. The journal impact factor, as published by ISI (Philadelphia, PA), is the best-known example of a formulation of impact of journals (considered as a set of articles) but many others have been defined in the literature. Impact factors have varying publication and citation periods and the chosen length of these periods enables, e.g., a distinction between synchronous and diachronous impact factors. It is shown how an impact factor for the general case can be defined. Two alternatives for a general impact factor are proposed, depending an whether different publication years are seen as a whole, and hence treating each one of them differently, or by operating with citation periods of identical length but allowing each publication period different starting points.
Themenfeld: Informetrie ; Citation indexing
13Frandsen, T.F.: Journal diffusion factors - a measure of diffusion?.
In: Aslib proceedings. 56(2004) no.1, S.5-11.
Abstract: This paper shows that the measure of diffusion introduced by Ian Rowlands called the journal diffusion factor (JDF) is highly negatively correlated with the number of citations, leading highly cited journals to get a low JDF, whereas less cited journals get a high JDF. This property reduces the utility of the JDF as a tool for evaluation of research influence. The paper presents a new definition of the JDF in order to attempt to improve it. This new JDF corrects the strong correlation with the number cited, but has a strongly statistically positive correlation with journal impact factors (JIF). However, the new JDF may still be used as an evaluation tool since, for journals with similar JIF values, the new JDF can be used to differentiate between them. Thereby, journal evaluation will be based on more than one aspect of journal influence when assessing journal influence with similar journal impact factor values.